Question33:-Which of the following statement is/are incorrect about hollow cathode
lamp?

(1) It is the resonance line source in AAS.

(11) It has an emitting anode made of the element being studied.

(iii) It has an emitting cathode made of the element being studied.

(iv) The anode is in the form of a cylinder.

A:-Only (i) and (iii)
B:-Only (ii) and (iv)
C:-Only (ii)

D:-Only (iii) and (iv)
Correct Answer:- Option-B

Question34:-The photoelectron spectrum of argon is generated by using a helium
source of energy 21.22 eV. What will be the binding energy of argon if its kinetic
energy is 5.4 eV?

A:-5.4 eV

B:-26.62 eV

C:-15.82 eV

D:-10.61 eV

Correct Answer:- Option-C

Question35:-In X-ray photoelectron spectroscopy, irradiation of atoms by X-rays
leads to:

A:-Photoionisation through the ejection of valance electrons
B:-Ejection of the core electrons
C:-Excitation of the valance electrons
D:-Emission of characteristic X-rays by core electrons.
Correct Answer:- Option-B
Question36:-Which of the following is not a background correction method in AAS?
A:-Deuterium arc method
B:-Stark effect method
C:-Zeeman effect method
D:-Smith-Hieftje system
Correct Answer:- Option-B

Question37:-Pick out most appropriate statements regarding ICP - AES
(i) | Produces lesser number of excited atoms compared to Flame Emission
Spectroscopy
(ii) | Self-absorption is practically absent compared to Flame Emission
Spectroscopy
(iii) Inductively Coupled Plasma (ICP) generally has inferior detection limits to
Direct Current

Plasma (DCP).
(iv) Suitable for simultaneous multi-elemental determination