Chemistry
                                                                                                                                                                                                                           Chapter # 2
                                                                                                             Quiz  

                                                    Atomic                                                                                              Structure

Name:

Positive rays are produced in discharge tube:

From cathode surface

From anode surface

By ionization of gas molecules

Both a & b.

William Crook concluded from pin wheel experiment that cathode rays have:

Momentum and energy

Positive charge

.Cast shadow

Deflect in magnetic field

A visible ray of highest frequency is:

Red

Violet

Infra red

Ultraviolet

The decreasing order of wavelengths when energy of radiation A > C> B:

A > C> B

B > C> A

A > B> C

C > B> A

In continuous spectrum:

Some wavelengths are missing

No wavelengths are missing

Dark spaces separate bright lines

Additional wavelengths are observed

A band of colors of an oil film on the Water surface is an example of :

Continuous spectrum

Discontinuous spectrum

Band spectrum

Line spectrum

Bohr’s model helps to explain:

Photoelectric effect

Zeeman effect

Stark effect

Stability and Line spectrum

An electronic level that allows only absorption and not emission of energy :

1s

2s

2p

3s

When an electron falls from higher into second energy level in H-atom, the emitted radiations are:

Ultraviolet

Infra-red

Visible

X-rays

The frequency of X-rays produced in X-rays tube increase with an increase in:

Size of cathode

Atomic number of cathode

Size of anti-cathode

Atomic number of anti- cathode

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