Hydrogen NDA Questions

NDA Chemistry

Hydrogen MCQ Questions


7.
Because it shows dual behaviour, resembling both alkali metals and halogens, hydrogen is generally placed in the periodic table:
A.
Strictly within Group 17 only
B.
Separately, at the top, without being strictly assigned to Group 1 or Group 17
C.
Strictly within Group 1 only
D.
In Group 14, alongside carbon
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ANSWER :
B. Separately, at the top, without being strictly assigned to Group 1 or Group 17
8.
Hydrogen exists as a diatomic molecule (H2), a structural feature it shares with the:
A.
Halogens
B.
Alkaline earth metals
C.
Noble gases
D.
Alkali metals
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ANSWER :
A. Halogens
9.
Hydrogen exists as a gas at ordinary room temperature, a physical state property it shares with the:
A.
Halogens (e.g., Cl2, F2)
B.
Alkali metals
C.
Alkaline earth metals
D.
Transition metals
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ANSWER :
A. Halogens (e.g., Cl2, F2)
10.
Unlike the highly reactive metallic solids of Group 1, hydrogen at room temperature is best described as a:
A.
Liquid non-metal
B.
Non-metallic gas
C.
Reactive metallic solid
D.
Metalloid solid
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ANSWER :
B. Non-metallic gas
11.
Depending on the compound it forms, hydrogen can exhibit oxidation states of:
A.
Only +1
B.
Only −1
C.
Both +1 and −1
D.
Only 0
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ANSWER :
C. Both +1 and −1
12.
The hydride ion (H⁻), formed when hydrogen gains one electron, is isoelectronic with which noble gas?
A.
Helium
B.
Neon
C.
Argon
D.
Krypton
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ANSWER :
A. Helium