Question

Q.1. A. Choose the most appropriate answer.
[5]
i) Which gas is produced when copper (II) carbonate is
heated?
a) Hydrogen
b)Oxygen
c) Carbon dioxide
d) None of these
ii) Which non-metal has a shining surface?
a) Iodine
b) Sulphur
c) Zinc
d) Copper
iii) Which of the following is used as a rocket propellant?
a) Liquid Oxygen
b) Dry ice
c) Hydrogen
d) Nitrogen
iv) Which of the following is used to prepare oxygen?
a) Nitrogen dioxide b) Carbon monoxide
c) Hydrogen peroxide d) Carbon dioxide
v) Which is the most abundant metal in the earth's crust?
a) Copper
b) Aluminum
c) Iron
d) Zinc
15​

Answer 1

Answer:

1 carbon dioxide

2 sulphur

3 hydrogen

4 hydrogen peroxide

5 aluminium

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Answer 2

Answer:

I) c) carbon dioxide

ii). a) iodine

iii). c) hydrogen

iv ). c) hydrogen peroxide

v) b) aluminium

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