Mixtures and Compounds NDA Questions

NDA Chemistry

Mixtures and Compounds MCQ Questions


7.
What is the melting point of sodium hydroxide in K?
A.
591 K
B.
190 K
C.
256 K
D.
300 K
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ANSWER :
A. 591 K
8.
The alkaline earth metals are ______, lustrous and relatively soft but harder than the alkali metals.
A.
Silvery white
B.
Crimson red
C.
Violet
D.
Blue
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ANSWER :
A. Silvery white
9.
The electropositive character ______ down the group from Be to Ba
A.
Backward
B.
Forward
C.
Decreases
D.
Increases
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ANSWER :
D. Increases
10.
What is the other name of washing soda?
A.
Sodium carbonate
B.
Sodium hydroxide
C.
Sodium chloride
D.
Sodium borohydride
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ANSWER :
A. Sodium carbonate
11.
Sodium hydroxide is a white, translucent _____
A.
Plasma
B.
Gas
C.
Liquid
D.
Solid
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ANSWER :
D. Solid
12.
Lithium and magnesium react _____ with water
A.
Slowly
B.
Fastly
C.
Speeder
D.
None of these
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ANSWER :
A. Slowly