Question

Consider the following two statements (A) Line spectra contain information about atoms.
(B) Band spectra contain information about molecules.
(a) Both A and B are wrong
(b) A is correct but B is wrong
(c) B is correct but A is wrong
(d) Both A and B are correct

Answer 1

(A) line specta contains information about atoms

( B)band spectra contains information about molecules

(d) Both A and B are correct

1.The bright coloured spectral lines are found in the line spectrum

2.the lines are made up of atoms

3.Band spectra which is also known as molecular spectra are radiated from rotational or vibrating molecules

Answer 2

(A) Line spectra contain information about atoms.

(B) Band spectra contain information about molecules.

On considering the above statements, Both A and B are correct

Explanation:

• When elements or their compounds are heated by a flame or arc, they emit energy in the frame of light.
• Analysis of this light with a spectroscope reveals a discontinuous spectrum. The spectrum appears in a row of lines called spectrum lines.
• This linear spectrum is also named an atomic spectrum because it comes from an element.
• The energy of the molecule can also change due to rotation, vibration and vibration transitions (combined vibrations and electronics).
• These energy transformations often result in many distinct spectral lines that are identified as spectral bands or band spectra.

Therefore the correct answer is Option (d)