Question

1 Which of the following is a covalent compound
(a) Sodium chloride
(b) Carbon tetrachloride
(c) Magnesium Chloride
(d) Calcium Chloride​



2 The salt that undergoes photo chemical decomposition is
(a) Copper sulphate
(b) Zinc carbonate
(c) Lead bromide
(d) Silver nitrate




3 With the increase in temperature the solubility of sodium chloride in water
(a) decreases
(b) increases and then decreases
(c) increases sharply
(d) increases only a little






4 Which metal gives hydrogen on reacting with water, acid and alkali?
(a) Iron
(b) Zinc
(c) Magnesium
(d) Lead






5 A substance that does not contain water of crystallization is
(a) Blue vitrol
(b) Common salt
(c) Glauber's salt
(d) Washing soda crystals



​

Answer 1

1. B - Carbon Tetrachloride

2. D - Silver Nitrate

3. D - Increases only a little

4. A - Iron

5. B - Common Salt

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Answer 2

Explanation:

1) Sodium Chloride

2)Silver Nitrate

3)decreases

4)Zinc

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