Metal and Non-Metals UPSC Questions

Chemistry

Metal and Non-Metals MCQ Questions


13.

What is the ordinary temperature of the surfaces of metals that are covered with a thin layer of oxide?
(i)Magnesium
(ii)Aluminium
(iii)Zinc
(iv)Oxide etc.,

A.

Options i,ii,iii

B.

Options i,ii,iv

C.

Options ii,iii,iv

D.

All of the Above

😑 View Answer Rough Work Error
ANSWER :

A. Options i,ii,iii

14.
What does not burn on heating but filings burn vigorously when sprinkled in the flame of the burner ?
A.
Silver
B.
Copper
C.
Zinc
D.
Iron
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ANSWER :
D. Iron
15.
Copper does not burn but the hot metal is coated with a black coloured layer of
A.
Aluminium Oxide
B.
Copper(II) Oxide
C.
Metal Oxides
D.
Oxide Layer
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ANSWER :
B. Copper(II) Oxide
16.
Which two do not react with oxygen even at high temperatures?
A.
Gold and Platinum
B.
Iron and Copper
C.
Copper and Zinc
D.
Silver and Gold
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ANSWER :
D. Silver and Gold
17.

What is the name of the reaction?
Ca(s) + 2H2O(l) → Ca(OH)2 (aq) + H2 (g)

A.

Calcium Reaction

B.

Decomposition Reaction

C.

Synthesis Reaction

D.

Chlorine Reaction

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ANSWER :

A. Calcium Reaction

18.
Calcium starts floating because the bubbles of ______________ formed stick to the surface of the metal.
A.
Gas
B.
Solid
C.
Liquid
D.
Hydrogen Gas
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ANSWER :
D. Hydrogen Gas