IGCSE Chemistry 0620 Overall Revision Quiz
What does the atomic number of an atom represent?
The atomic number indicates the total mass of an atom.
The atomic number represents the number of protons in an atom's nucleus.
The atomic number signifies the number of neutrons in an atom.
The atomic number represents the number of electrons in an atom.
Describe the structure of an atom
An atom is made up of a nucleus, which contains electrons and protons, with neutrons orbiting around it.
The structure of an atom is composed of a nucleus, which contains electrons and protons, with neutrons located outside the nucleus.
An atom consists of a nucleus, which contains protons and neutrons, surrounded by electrons in energy levels or shells.
Atoms are comprised of a nucleus, which contains protons and electrons, with neutrons found in the electron cloud.
How many valence electrons does Sulfur have?
6
8
3
7
Why are noble gases monoatomic?
Noble gases are monoatomic because they have a high ionization energy, which means it requires a lot of energy to remove an electron from their outermost shell.
Noble gases are monoatomic because they have a low electronegativity, which means they do not readily attract or share electrons with other atoms.
Noble gases are monoatomic because they have a large atomic radius, which makes it difficult for them to form chemical bonds with other elements.
Noble gases have completely filled valence shells, which makes them stable and less likely to form chemical bonds with other elements.
What does the period number on the periodic table represent?
The period number represents the number of energy levels or shells that an atom's electrons occupy.
The period number represents the number of protons in an atom's nucleus.
The period number represents the atomic ma
The period number represents the number of neutrons in an atom's nucleus.
What is an isotope?
An isotope is a type of molecule that contains two or more different elements.
An isotope is a subatomic particle with a positive charge found in the nucleus of an atom.
An isotope is a variant of an element that has the same number of protons but a different number of neutrons.
An isotope is a type of chemical bond formed between two atoms.
How to isotopes of the same atom differ from each other?
Isotopes of the same atom differ in their number of protons.
Isotopes of the same atom differ in their atomic mass.
Isotopes of the same atom differ in their electron configuration.
Isotopes of the same atom differ in their number of neutrons.
Why is the relative atomic mass of Chlorine 35.5?
The relative atomic mass of Chlorine is 35.5 because it is the average mass of all the naturally occurring isotopes of Chlorine, taking into account their abundance.
The relative atomic mass of Chlorine is 35.5 because it is the sum of the masses of its protons and neutrons in the nucleus.
The relative atomic mass of Chlorine is 35.5 because it is determined by the number of electrons in its outermost energy level.
The relative atomic mass of Chlorine is 35.5 because it is a rounded value for simplicity in calculations.
What is an ionic bond?
An ionic bond is a type of chemical bond where atoms share electrons equally, resulting in the formation of a stable compound.
An ionic bond is a type of chemical bond where atoms share electrons unequally, resulting in the formation of a polar molecule.
An ionic bond is a type of chemical bond where atoms form covalent bonds, resulting in the formation of a network solid.
An ionic bond is a type of chemical bond where electrons are transferred from one atom to another, resulting in the formation of ions.
Which of these are made up of a giant lattice structure of an ionic compound?
A diamond
A covalent compound
A metallic compound
A salt crystal
In terms of structure and bonding, why do ionic compounds have high melting and boiling points?
Ionic compounds have high melting and boiling points due to the strong electrostatic forces of attraction between oppositely charged ions.
Ionic compounds have high melting and boiling points because they are made up of large, closely packed lattice structures held together by strong electrostatic forces.
Ionic compounds have high melting and boiling points because they contain covalent bonds that require a lot of energy to break.
Ionic compounds have high melting and boiling points because they have weak intermolecular forces between their molecules.
In terms of structure and bonding, why are ionic compounds able to conduct electricity in the liquid of aqueous state?
Ionic compounds are able to conduct electricity in the liquid or aqueous state because the ions are free to move and carry electric charge.
Ionic compounds are able to conduct electricity in the liquid or aqueous state because they have a high melting point and can easily break down into ions.
Ionic compounds are able to conduct electricity in the liquid or aqueous state because they have covalent bonds that allow for the flow of electrons.
Ionic compounds are able to conduct electricity in the liquid or aqueous state because they have metallic bonds that allow for the flow of electrons.
Why do covalent compounds have a low melting point and boiling point?
Covalent compounds have strong metallic bonds
Covalent compounds have weak intermolecular forces
Covalent compounds have high electronegativity
Covalent compounds have a high number of valence electrons
Why are covalent compounds not able to conduct electricity?
Covalent compounds do not contain charged particles that can move freely to conduct electricity.
Covalent compounds have a low melting and boiling point, which prevents the flow of electrons.
Covalent compounds have a high electrical resistance due to their strong covalent bonds.
Covalent compounds lack mobile ions necessary for conducting electricity.
Which of these pairs of substances have a giant covalent structure?
Diamond and graphite
Water and ethanol
Sodium chloride and potassium iodide
Oxygen and nitrogen
In terms of structure, how are diamond and silicon(IV) oxide similar?
Both diamond and silicon(IV) oxide have a three-dimensional network structure.
Diamond and silicon(IV) oxide both have covalent bonds between their atoms.
Both diamond and silicon(IV) oxide are composed of carbon and oxygen atoms.
Diamond and silicon(IV) oxide both have a high melting point.
Describe the bonding in the particles in a metal
The particles in a metal are held together by covalent bonds.
The particles in a metal are held together by metallic bonds.
The particles in a metal are held together by ionic bonds.
The particles in a metal are held together by hydrogen bonds.
What is electrolysis?
Electrolysis is the process of breaking down a compound into its constituent elements using an electric current.
Electrolysis is the process of converting electrical energy into chemical energy.
Electrolysis is the process of generating electricity through the use of chemical reactions.
Electrolysis is the process of purifying water by removing impurities using an electric current.
What is the anode and the cathode in an electrolytic cell?
The anode is where electrons are given off and the cathode is where electrons are absorbed.
The anode is the negatively charged electrode and the cathode is the positively charged electrode.
The anode is the electrode where reduction occurs and the cathode is the electrode where oxidation occurs.
The anode is the electrode where oxidation occurs and the cathode is the electrode where reduction occurs.
How do the electrons move in the external circuit of an electrolytic cell?
The electrons move from the anode to the cathode
The electrons move from the cathode to the anode
The electrons move randomly in the external circuit
The electrons do not move in the external circuit
In electrolysis, in which electrodes do the gain and loss of electrons occur?
The gain and loss of electrons occur at both the anode and the cathode
The gain of electrons occurs at the cathode and the loss of electrons occurs at the anode
The gain of electrons occurs at the anode and the loss of electrons occurs at the cathode
Electrons are only passed from the cations to the anions directly.
In electrolysis, describe the movement of ions in the electrolyte
Ions move from the anode to the cathode
Ions move from the cathode to the anode
Ions move randomly in the electrolyte
Ions do not move in the electrolyte
Identify the products formed at the electrodes during the electrolysis of molten lead (II) bromide.
Lead (II) oxide and bromine gas
Lead (II) bromide and oxygen gas
Lead metal and bromine gas
Lead (II) bromide and hydrogen gas
Identify the products formed at the electrodes during the electrolysis of concentrated aqueous sodium chloride.
Sodium metal and hydrogen gas
Chlorine gas and sodium hydroxide
Sodium chloride and water
Chlorine gas and sodium chloride
Identify the products formed at the electrodes during the electrolysis of dilute sulfuric acid
Hydrogen gas and oxygen gas
Sulfur gas and water
Sulfuric acid and hydrogen gas
Water and carbon dioxide
Describe the observations made during the electrolysis of molten lead(II) bromide.
During the electrolysis of molten lead(II) bromide, several observations can be made. First, a reddish-brown gas is evolved at the anode, which is bromine gas. This gas has a strong odor and is corrosive. Second, a shiny, silvery metal is deposited at the cathode, which is lead metal. Third, the color of the molten lead(II) bromide changes from white to yellowish-brown due to the formation of lead(II) ions in the molten salt. Finally, the electrolyte conducts electricity due to the movement of ions in the molten state. Overall, the observations indicate that the electrolysis of molten lead(II) bromide results in the decomposition of the salt into its constituent elements, lead and bromine.
During the electrolysis of molten lead(II) bromide, a green gas is evolved at the anode, which is chlorine gas. This gas has a pungent odor and is toxic. At the cathode, a black solid is deposited, which is lead(II) oxide. The color of the molten lead(II) bromide remains unchanged. The electrolyte conducts electricity due to the movement of ions in the molten state. These observations indicate that the electrolysis of molten lead(II) bromide results in the formation of lead(II) oxide and chlorine gas.
During the electrolysis of molten lead(II) bromide, a yellow gas is evolved at the anode, which is sulfur dioxide gas. This gas has a suffocating odor and is toxic. At the cathode, a gray solid is deposited, which is lead(II) sulfide. The color of the molten lead(II) bromide changes to a pale yellow. The electrolyte conducts electricity due to the movement of ions in the molten state. These observations indicate that the electrolysis of molten lead(II) bromide results in the formation of lead(II) sulfide and sulfur dioxide gas.
During the electrolysis of molten lead(II) bromide, a colorless gas is evolved at the anode, which is oxygen gas. This gas supports combustion and is necessary for respiration. At the cathode, a white solid is deposited, which is lead(II) carbonate. The color of the molten lead(II) bromide changes to a milky white. The electrolyte conducts electricity due to the movement of ions in the molten state. These observations indicate that the electrolysis of molten lead(II) bromide results in the formation of lead(II) carbonate and oxygen gas.
What is observed at the cathode during the electrolysis of concentrated sodium chloride solution?
Chlorine gas is observed
Sodium metal is observed
Oxygen gas is observed
Hydrogen gas is observed
What is observed at the anode during the electrolysis of dilute sulfuric acid solution?
Hydrogen gas is observed
Oxygen gas is observed
Sulfur dioxide gas is observed
Carbon dioxide gas is observed
What is the half equation for the reaction at the cathode when molten lead bromide is electrolysed?
Pb2+ + 2e- -> Pb
Br- -> Br + e-
Pb2+ + 2Br- -> PbBr2
Pb2+ + 2e- -> Pb2+
Why are metal objects electroplated?
Metal objects are electroplated to prevent corrosion
Metal objects are electroplated to make them more shiny
Metal objects are electroplated to increase their strength
Metal objects are electroplated to improve their conductivity
Which is one advantage of using a hydrogen-oxygen fuel cell over a petrol engine?
One advantage of using a hydrogen-oxygen fuel cell over a petrol engine is that it produces zero emissions.
One advantage of using a hydrogen-oxygen fuel cell over a petrol engine is that it provides higher energy efficiency.
One advantage of using a hydrogen-oxygen fuel cell over a petrol engine is that it requires less maintenance.
One advantage of using a hydrogen-oxygen fuel cell over a petrol engine is that it offers quieter operation.
What is enthalpy change?
Enthalpy change is the heat absorbed or released during a chemical reaction.
Enthalpy change is the change in temperature of a substance during a physical change.
Enthalpy change is the amount of energy required to break the bonds of a molecule.
Enthalpy change is the difference in pressure between two points in a system.
What is activation energy?
Activation energy is the minimum amount of energy required for a chemical reaction to occur.
Activation energy is the energy released during a chemical reaction.
Activation energy is the energy required to stop a chemical reaction.
Activation energy is the energy stored in a substance before a chemical reaction takes place.
What is the enthalpy change for an exothermic reaction?
The enthalpy change is positive
The enthalpy change is negative
The enthalpy change is zero
The enthalpy change depends on the temperature
What is the enthalpy change for an endothermic reaction?
The enthalpy change is positive
The enthalpy change is negative
The enthalpy change is zero
The enthalpy change is undefined
Is bond breaking an endothermic or exothermic process?
Bond breaking is an endothermic process.
Bond breaking is an exothermic process.
Bond breaking is a neutral process.
Bond breaking can be both endothermic and exothermic depending on the specific reaction.
Is bond making an endothermic or exothermic process?
Bond making is an exothermic process.
Bond making is an endothermic process.
Bond making does not involve any energy change.
Bond making can be both endothermic and exothermic, depending on the specific reaction.
What is collision theory?
Collision theory is a theory that explains how chemical reactions occur and why reaction rates vary. It states that for a reaction to occur, particles must collide with sufficient energy and proper orientation.
Collision theory is a theory that explains the formation of new elements in stars through the collision of atomic nuclei.
Collision theory is a theory that describes the process of two or more celestial bodies colliding in space.
Collision theory is a theory that explains the behavior of subatomic particles in particle accelerators.
How does a catalyst affect the activation energy of a reaction?
A catalyst increases the activation energy of a reaction.
A catalyst decreases the activation energy of a reaction.
A catalyst has no effect on the activation energy of a reaction.
A catalyst converts the activation energy into heat energy.
What happens to the rate of reaction when the concentration of solutions is increased?
The rate of reaction increases
The rate of reaction decreases
The rate of reaction remains the same
The rate of reaction becomes unpredictable
What happens to the rate of reaction when the pressure of gases is reduced?
The rate of reaction decreases
The rate of reaction increases
The rate of reaction remains the same
The rate of reaction becomes unpredictable
What happens to the rate of reaction when the surface area of solids is increased?
The rate of reaction increases
The rate of reaction decreases
There is no effect on the rate of reaction
The rate of reaction remains constant
What happens to the rate of reaction when the temperature is reduced?
The rate of reaction decreases
The rate of reaction increases
The rate of reaction remains the same
The rate of reaction becomes unpredictable
For a reversible reaction, how is the position of equilibrium affected by increasing temperature?
The position of equilibrium is not affected by increasing temperature.
Increasing temperature shifts the position of equilibrium to the left.
Increasing temperature shifts the position of equilibrium to the right.
Increasing temperature has no effect on the position of equilibrium.
For a reversible reaction, how is the position of equilibrium affected by increasing the concentration?
The position of equilibrium is not affected by increasing the concentration
Increasing the concentration shifts the position of equilibrium to the left
Increasing the concentration shifts the position of equilibrium to the right
Increasing the concentration has no effect on the position of equilibrium
What are the temperature, pressure and catalyst needed for the Haber Process?
The temperature is 450 degrees Celsius, the pressure is 200 atmospheres, and the catalyst is iron.
The temperature is 300 degrees Celsius, the pressure is 100 atmospheres, and the catalyst is platinum.
The temperature is 600 degrees Celsius, the pressure is 50 atmospheres, and the catalyst is nickel.
The temperature is 400 degrees Celsius, the pressure is 150 atmospheres, and the catalyst is palladium.
In the Haber Process, what is the source of nitrogen?
Atmospheric nitrogen
Nitric acid
Ammonium nitrate
Nitrogen gas cylinders
What is an acid?
An acid is a substance that donates protons or accepts electrons.
An acid is a type of chemical compound that reacts with bases to form carbon dioxide.
An acid is a bitter-tasting substance that turns blue litmus paper red.
An acid is a corrosive substance that can dissolve metals.
What is a strong acid?
A strong acid is an acid that completely dissociates in water to produce hydrogen ions.
A strong acid is an acid with a pH value less than 2.
A strong acid is an acid that reacts violently with metals.
A strong acid is an acid that has a sour taste.
What is a weak acid?
A weak acid is an acid that only partially dissociates in water and releases a small amount of hydrogen ions.
A weak acid is an acid that has a low concentration and does not completely ionize in water.
A weak acid is an acid that has a pH value greater than 7.
A weak acid is an acid that is highly reactive and easily reacts with other substances.
What are the temperature, pressure and catalyst needed for the Contact Process to occur?
The temperature needed is 450-500°C, the pressure is 1-2 atmospheres, and the catalyst used is vanadium pentoxide.
The temperature needed is 200-250°C, the pressure is 5-10 atmospheres, and the catalyst used is iron(III) oxide.
The temperature needed is 800-1000°C, the pressure is 20-30 atmospheres, and the catalyst used is nickel.
The temperature needed is 300-350°C, the pressure is 3-5 atmospheres, and the catalyst used is platinum.
For a reversible reaction, how is the position of equilibrium affected by decreasing pressure?
The position of equilibrium is not affected by decreasing pressure.
The position of equilibrium shifts to the left, favoring the reactants.
The position of equilibrium shifts to the right, favoring the products.
The position of equilibrium remains unchanged.
What is meant when a reversible reaction in a closed system is in equilibrium?
When a reversible reaction in a closed system is in equilibrium, it means that the forward and backward reactions are occurring at the same rate and there is no net change in the concentrations of reactants and products.
When a reversible reaction in a closed system is in equilibrium, it means that the reaction has stopped and no further changes are happening.
When a reversible reaction in a closed system is in equilibrium, it means that the reaction has reached its maximum yield of products.
When a reversible reaction in a closed system is in equilibrium, it means that the reaction is proceeding only in one direction and not in the reverse direction.
What is meant when a reversible reaction in a closed system is in equilibrium?
When a reversible reaction in a closed system is in equilibrium, it means that the forward and reverse reactions are occurring at the same rate and there is no net change in the concentrations of reactants and products.
When a reversible reaction in a closed system is in equilibrium, it means that the reaction has stopped and no further changes occur.
When a reversible reaction in a closed system is in equilibrium, it means that the reaction has reached completion and all reactants have been converted into products.
When a reversible reaction in a closed system is in equilibrium, it means that the reaction is proceeding only in the forward direction and no reverse reaction occurs.
In the Haber Process, why is a temperature higher than 450 not used?
A temperature higher than 450 leads to a decrease in the yield of ammonia
A temperature higher than 450 causes the reaction to become too slow
A temperature higher than 450 results in the formation of unwanted byproducts
A temperature higher than 450 increases the energy consumption of the process
In the contact process, why is a pressure higher than 2 atm not used?
A pressure higher than 2 atm is not necessary for the contact process
Using a pressure higher than 2 atm would lead to an uncontrollable reaction
The catalyst used in the contact process is only effective at pressures below 2 atm
At pressures higher than 2 atm, the production of unwanted byproducts increases significantly
What is a reducing agent?
A reducing agent is a substance that donates electrons to another chemical species, causing it to undergo reduction.
A reducing agent is a substance that increases the concentration of hydrogen ions in a solution.
A reducing agent is a substance that speeds up a chemical reaction without being consumed in the process.
A reducing agent is a substance that decreases the temperature at which a chemical reaction takes place.
What is an oxidising agent?
An oxidising agent is a substance that causes another substance to lose electrons, resulting in an increase in its oxidation state.
An oxidising agent is a substance that causes another substance to gain electrons, resulting in a decrease in its oxidation state.
An oxidising agent is a substance that causes another substance to undergo a chemical reaction, resulting in the formation of a new compound.
An oxidising agent is a substance that causes another substance to release energy, resulting in an exothermic reaction.
When acidified aqueous potassium manganate is involved in a redox reaction, what is the expected colour change?
The expected colour change is from purple to colorless
The expected colour change is from purple to green
The expected colour change is from purple to yellow
The expected colour change is from purple to blue
What are the products when an acid reacts with a metal?
Hydrogen gas and a salt
Oxygen gas and a salt
Water and a salt
Carbon dioxide and a salt
What are the products when an acid reacts with a base?
Water and a salt
Hydrogen gas and oxygen gas
Carbon dioxide and water
Ammonia and sulfuric acid
What are the products when an acid reacts with a carbonate?
Carbon dioxide and water
Hydrogen gas and oxygen gas
Salt and water
Ammonia and nitrogen gas
What is the difference between an base and an alkali?
An alkali is a type of base that dissolves in water.
A base is a type of alkali that does not dissolve in water.
Bases are typically stronger than alkalis.
Alkalis are commonly found in acidic substances.
What is an amphoteric oxide?
An amphoteric oxide is an oxide that can react with both acids and bases.
An amphoteric oxide is an oxide that can only react with acids.
An amphoteric oxide is an oxide that can only react with bases.
An amphoteric oxide is an oxide that does not react with any other substances.
Which of the following salts are insoluble?
Zinc Nitrate
Lead chloride
Silver chloride
Sodium carbonate
Potassium hydroxide
Copper hydroxide
Magnesium carbonate
Barium sulfate
Calcium sulfate
How would a sample of lead sulfate be prepared?
Precipitation
Acid + Alkali Titration
Acid + Metal
Acid + base
How does the reactivity of Group 1 elements in the periodic table change down the group?
The reactivity of Group 1 elements increases down the group
The reactivity of Group 1 elements decreases down the group
The reactivity of Group 1 elements remains constant down the group
The reactivity of Group 1 elements is unpredictable down the group
How does the reactivity of Group 7 elements in the periodic table change down the group?
The reactivity decreases down the group
The reactivity increases down the group
The reactivity remains constant down the group
The reactivity fluctuates randomly down the group
Why is aluminium used to manufacture aircraft?
Aluminium is lightweight and has a high strength-to-weight ratio, making it ideal for aircraft manufacturing.
Aluminium is abundant and inexpensive, making it a cost-effective choice for aircraft manufacturing.
Aluminium is resistant to corrosion, ensuring the longevity of aircraft structures.
Aluminium is highly conductive, allowing for efficient electrical systems in aircraft.
Why are alloys harder than pure metals?
Alloys have a more ordered atomic structure, which makes it harder for dislocations to move through the material.
Alloys contain impurities that strengthen the material and prevent dislocation movement.
Alloys have a higher melting point than pure metals, making them harder.
Alloys have a larger grain size, which increases their hardness.
What is anhydrous copper (II) sulfate used to test for?
Anhydrous copper (II) sulfate is used to test for water.
Anhydrous copper (II) sulfate is used to test for the presence of oxygen.
Anhydrous copper (II) sulfate is used to test for the acidity of a solution.
Anhydrous copper (II) sulfate is used to test for the presence of carbon dioxide.
How do we know if a substance is pure?
A substance is pure if it has a fixed melting and boiling point.
A substance is pure if it is transparent and colorless.
A substance is pure if it is odorless and tasteless.
A substance is pure if it dissolves completely in a solvent without leaving any residue.
What are the main chemicals that cause acid rain?
Sulfur dioxide and nitrogen oxides
Carbon monoxide and methane
Ozone and carbon dioxide
Lead and mercury
In organic chemistry, what is a functional group?
A functional group is a specific group of atoms within a molecule that is responsible for the characteristic chemical reactions of that molecule.
A functional group is a type of chemical bond that forms between two atoms, allowing them to share electrons and create a stable molecule.
A functional group is a term used to describe a group of chemicals that are commonly found in organic compounds, such as hydroxyl, carbonyl, and amino groups.
A functional group is a type of reaction that occurs when two or more molecules combine to form a larger molecule, often with the release of energy.
In organic chemistry, what is a homologous series?
A homologous series is a group of organic compounds that have the same functional group and similar chemical properties, with each successive member differing by a CH2 unit.
A homologous series is a type of chemical reaction that occurs in organic chemistry, involving the substitution of one functional group for another.
A homologous series is a classification system used in organic chemistry to categorize compounds based on their molecular weight.
A homologous series is a term used to describe the process of synthesizing organic compounds from inorganic precursors.
In organic chemistry, what is an unsaturated compound?
An unsaturated compound is a compound that contains double or triple bonds between carbon atoms.
An unsaturated compound is a compound that contains only single bonds between carbon atoms.
An unsaturated compound is a compound that contains both carbon and hydrogen atoms.
An unsaturated compound is a compound that contains only carbon atoms.
What are hydrocarbons?
Hydrocarbons are organic compounds made up of only hydrogen and carbon atoms.
Hydrocarbons are chemical substances found in water bodies.
Hydrocarbons are minerals formed by the combination of hydrogen and carbon.
Hydrocarbons are gases released during volcanic eruptions.
Hydrocarbons are compounds used in the production of plastics and fuels.
How is petroleum separated into useful fractions?
By fractional distillation
By chemical reaction
By filtration
By evaporation
What is the colour change observed when propene is reacted with aqueous bromine?
The color changes from clear to yellow
The color changes from clear to red
The color changes from clear to green
The color changes from clear to blue
In the production of ethanol through the catalytic addition of steam, what is the required temperature, pressure and catalyst?
The required temperature is 400 degrees Celsius, the pressure is 10 atmospheres, and the catalyst is sulfuric acid.
The required temperature is 200 degrees Celsius, the pressure is 5 atmospheres, and the catalyst is sodium hydroxide.
The required temperature is 600 degrees Celsius, the pressure is 20 atmospheres, and the catalyst is phosphoric acid.
The required temperature is 300 degrees Celsius, the pressure is 15 atmospheres, and the catalyst is potassium hydroxide.
What kind of reaction do Alkanes Go through?
Addition
Substitution
What kind of reaction do Alkenes Go through?
Addition
Substitution
When Alkanes go through a substitution reaction with Chlorine, what is required?
A high temperature
Light
Catalyst
High pressure
In Alkenes, what is a test for saturation?
The presence of bromine water turning from orange to colorless
The presence of potassium permanganate turning from purple to colorless
The presence of silver nitrate forming a white precipitate
The presence of iodine solution turning from brown to blue-black
What is produced when an alkene is reacted with hydrogen and a nickel catalyst?
Ethane
Methane
Propane
Butane
What is produced when an alkene is reacted with steam and an acid catalyst?
Ethanol
Methanol
Acetic acid
Hydrogen gas
In the creation of alcohols using steam and ethene, what are the temperature, pressure and catalyst required?
The temperature is 300°C, the pressure is 60-70 atm, and the catalyst is phosphoric acid
The temperature is 200°C, the pressure is 30-40 atm, and the catalyst is sulfuric acid
The temperature is 400°C, the pressure is 80-90 atm, and the catalyst is hydrochloric acid
The temperature is 250°C, the pressure is 50-60 atm, and the catalyst is nitric acid
What is one disadvantage of using fermentation to create alcohols?
One disadvantage of using fermentation to create alcohols is the production of impurities and by-products.
One disadvantage of using fermentation to create alcohols is the slow reaction rate compared to other methods of alcohol production.
One disadvantage of using fermentation to create alcohols is the limited control over the final product's quality and consistency.
One disadvantage of using fermentation to create alcohols is the requirement for specific environmental conditions, such as temperature and pH, which can be difficult to maintain.
What is needed in the formation of ethanoic acid by the oxidation of ethanol
Oxygen gas
Carbon dioxide
Water
Hydrogen gas
In the formation of esters, what reactants are required?
Alcohol and carboxylic acid
Alcohol and amine
Alcohol and aldehyde
Alcohol and ketone
Which laboratory apparatus is most suited to measure out 25 cubic centimetre of a solution?
Burette
Beaker
Pipette
Graduated cylinder
Describe the melting points, boiling points and electrical conductivity of ionic compounds
Ionic compounds have high melting points, high boiling points, and are good conductors of electricity.
Ionic compounds have low melting points, low boiling points, and are poor conductors of electricity.
Ionic compounds have high melting points, low boiling points, and are good conductors of electricity.
Ionic compounds have low melting points, high boiling points, and are poor conductors of electricity.
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