Matter and its Nature NEET Questions

Physical Chemistry - Some Basic Concepts of Chemistry

Matter and its Nature MCQ Questions


13.
A photoelectric surface is illuminated with λ and λ/2 light. If KE triples, the work function is:

NEET - 2017

A.
hc/4λ
B.
hc/3λ
C.
hc/2λ
D.
hc/λ
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ANSWER :
B. hc/3λ
14.
Which of the following represents the correct order of intermolecular forces in different states of matter?
A.
Gas > Liquid > Solid
B.
Solid > Liquid > Gas
C.
Liquid > Solid > Gas
D.
Solid > Gas > Liquid
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ANSWER :
B. Solid > Liquid > Gas
15.
Which of the following is a physical change?
A.
Rusting of iron
B.
Melting of ice
C.
Burning of paper
D.
Cooking of food
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ANSWER :
B. Melting of ice
16.
Energy of incident light increases by 20%, KE of emitted electrons increases from 0.5 eV to 0.8 eV. Find work function:

NEET - 2021

A.
1.3 eV
B.
1.5 eV
C.
0.65 eV
D.
1.0 eV
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ANSWER :
D. 1.0 eV
17.
Which of the following is not a state of matter?
A.
Plasma
B.
Bose-Einstein Condensate
C.
Neutronium
D.
Fermionic condensate
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ANSWER :
C. Neutronium
18.
Which of the following statements is incorrect about elements?
A.
They are made of different types of atoms
B.
They cannot be broken into simpler substances
C.
They have varying properties
D.
They are composed of molecules
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ANSWER :
A. They are made of different types of atoms