Question

Tick the correct options:
1. Materials that can be compressed easily are called..............
(a) soluble
(b) insoluble (c) hard. (d) soft
2. Which of the following is not a hard material?
(a) iron nail (b) foam
(c) copper jug. (d) aluminium rod
3. Sugar is...............in water.
(a) soluble
(b) insoluble
(c) miscible. (d) immiscible
4. Liquids that are completely mixed with water are called.................
(a) soluble. (b) insoluble
(c) miscible. (d) immiscible
5. Which of the following gases is soluble in water?
(a) nitrogen
(b) oxygen. (c) hydrogen
(d) methane ​

Answer 1

Answer:

d.soft

b.foam

a.soluble

a.soluble

b.oxygen

Answer 2

1:- [D] Materials which can be compressed or scratched easily are called soft while some other materials which are difficult to compress are called hard. For example, cotton or sponge is soft while iron is hard.

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2:- [B] foam

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3:- [A] soluble

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4:- [A] A mixture in which a substance has fully dissolved in water is called a solution and the substance is said to be soluble

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5:- The main gases dissolved in purified water are oxygen and nitrogen, carbon dioxide, plus traces of inert gases, all in equilibrium with ambient air.

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