The S-Block Elements NDA Questions

NDA Chemistry

The S-Block Elements MCQ Questions


1.
Electronic configuration of _____ resembles that of alkali metals.
A.
Hydrogen
B.
Helium
C.
Lithium
D.
Carbon
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ANSWER :
A. Hydrogen
2.
Just like halogens, hydrogen also exists as _____ molecules and it combines with metals and non-metals to form covalent compounds.
A.
Triatomic
B.
Diatomic
C.
Monoatomic
D.
None of these
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ANSWER :
B. Diatomic
3.
What is the atomic radius of hydrogen atom?
A.
26 pm
B.
17 pm
C.
37 pm
D.
20 pm
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ANSWER :
C. 37 pm
4.
Sodium hydrogen carbonate simply termed as _____
A.
Common salt
B.
Caustic soda
C.
Baking soda
D.
Washing soda
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ANSWER :
C. Baking soda
5.
Sodium hydrogen carbonate is made by saturating a solution of sodium carbonate with _____
A.
Nitrogen
B.
Carbon dioxide
C.
Ammonia
D.
Oxygen
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ANSWER :
B. Carbon dioxide
6.
What is the colour of moist hydrogen?
A.
Green
B.
Violet
C.
Red
D.
White
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ANSWER :
D. White