Mixtures and Compounds NDA Questions

NDA Chemistry

Mixtures and Compounds MCQ Questions


1.
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
2.
A qualitative measure of the ability of an atom in a chemical compound to attract shared electrons to itself is called
A.
Reactants
B.
Electropositive
C.
Electronegativity
D.
Electron repulsion
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ANSWER :
C. Electronegativity
3.
The organolead compounds were earlier used as anti-knock additives to petrol, but nowadays vehicles use ______ petrol.
A.
Ammonia-free
B.
Carbon-free
C.
Lead-free
D.
Lithium-free
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ANSWER :
C. Lead-free
4.
Which of the following are the industrially important compounds of sodium?
A.
Sodium carbonate
B.
Sodium hydroxide
C.
Sodium chloride
D.
All the above
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ANSWER :
D. All the above
5.
Lithium and magnesium oxides and hydroxides are much _____
A.
Highly soluble
B.
Less soluble
C.
Both a and b
D.
None of these
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ANSWER :
B. Less soluble
6.
Sodium hydroxide is generally prepared commercially by the electrolysis of sodium chloride in _____
A.
Copper furnace
B.
Baking kiln
C.
Castner-Kellner cell
D.
None of these
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ANSWER :
C. Castner-Kellner cell