Preparation and Properties of Hydrogen, Oxygen, Nitrogen and Carbon dioxide, Oxidation and Reduction NDA Questions

NDA Chemistry

Preparation and Properties of Hydrogen, Oxygen, Nitrogen and Carbon dioxide, Oxidation and Reduction MCQ Questions


7.
Electronic configuration of _____ resembles that of alkali metals.
A.
Hydrogen
B.
Helium
C.
Lithium
D.
Carbon
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ANSWER :
A. Hydrogen
8.
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
9.
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
10.
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
11.
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
12.
What is the most abundant element on earth?
A.
Helium
B.
Hydrogen
C.
Oxygen
D.
Carbon
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ANSWER :
C. Oxygen