Zinc sulphate forms a colourless solution in water. Will you
observe any colour on adding copper turning in it?
. A purple coloured non-metal forms a brown solution in alcohol
which is applied on wounds as an antiseptic. Name the nonmetal.
Name two major non-metals which are present in fertilisers and
enhance the growth of plants.
Which non-metal is essential for our life and all living beings
inhale it during breathing?
. 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
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