. Which of the following property is not responsible for copper to
be used as electrical conduction wires?
(a) ductility (c) good conductor of electricity
(b) colour (d) it is solid
Generally metallic oxides are basic and non-metallic oxides are
acidic in nature. Solution of which of the following oxides in
water will change the colour of blue litmus to red?
(a) sulphur dioxide (c) iron oxide
(b) magnesium oxide (d) copper oxide
Which of the following non-metals reacts and catches fire on
exposure to air?
(a) phosphorus (c) sulphur
(b) nitrogen (d) hydrogen
The metal which produces hydrogen gas on reaction with dilute
hydrochloric acid as well as sodium hydroxide solution is
(a) copper (c) aluminium
(b) iron (d) sodium
Which of the following reacts with cold water vigorously?
(a) carbon (c) magnesium
(b) sodium (d) sulphur
Metals generally react with dilute acids to produce hydrogen gas.
Which one of the following metals does not react with dilute
hydrochloric acid?
(a) magnesium (c) iron
(b) aluminium (d) copper
Metals are generally solid. Which of the following metals is in the
liquid state at room temperature?
(a) mercury (c) aluminium
(b) silver (d) sodium
Metals are generally hard. Which of the following metals is an
exception and can be cut with a knife?
(a) iron (c) gold
(b) sodium (d) magnesium
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