Question

Choose all the correct statements.

a) A hot gas emits a continuous spectrum.

b) A hot solid emits a continuous spectrum.

c) A hot gas emits a line spectrum.

d) A hot solid emits a line spectrum.

e) The emission spectrum from a hot solid cannot be used to identify the chemical compositions of the solid.

f) The emission spectrum from a hot gas can be used to identify the chemical compositions of the solid.

g) The emission spectrum from an incandescent light bulb is considered as light emitted from a hot gas.

h) The emission spectrum from a fluorescent tube is considered as light emitted from a hot gas.

Answer 1

a) A hot gas emits only line spectrum characterstic to the gas. Hence WRONG.

b) Hot solid emits continous spectrum over all range . Hence RIGHT.

c) A hot gas emits only line spectrum characterstic to the gas. Hence RIGHT.

d) Hot solid emits continous spectrum over all range . Hence WRONG

e) The emission spectrum from a hot solid cannot be used to identify the chemical compositions of the solid. SInce the emission is of all range . Hence RIGHT.

f) The emission spectrum from a hot gas cannot be used ot identify chemical composition of solid. It can be used to find chemical composition of gas. Hence WRONG.

g) The incandiscent bulb is example of solid continous spectrum hence its a spectrum of solid (Tungsten). Hence WRONG

h) Fluroscent tube emits the light from gas. Hence it can be comnsidered as light emission from gas. Hence right.