Question

1. A solution reacts with marble chips to produces a gas which turns lime water milky. The solution contains

A).Na2SO4 B). CaSO4 C). H2SO4 D).K2SO4

2. 10 mL of a solution of NaOH is found to be completely neutralised by 8mL of a given solution of HCl. If we take 20 mL of the same solution of NaOH, the amount of HCl solution (the same solution as before) required to neutralise it will be

A). 4 B). 8 C). 12 D).16

3. A solution reacts with zinc granules to give a gas which burns with a “pop” sound. The solution contains :-

A). ()2 B). 23 C). D).

4. Bee sting contains

A). An acid liquid B). A salt solution C). An alkaline liquid D).An alcohol

5. A solution turns red litmus blue. Its Ph is likely to be

A). 1 B). 4 C). 5 D).10

6. A solution turns blue litmus. Its pH is likely to be:

A). 7 B). 5 C). 8 D).14

7. Wasp stings can be treated with:

A). Baking soda B). Vinegar C). Washing soda D).Milk of magnesia​

Answer 1

Answer:

1. C). H2SO4
2. D).16
3. (d) HCl.
4. A). An acid liquid
5. D).10
6. B). 5
7. A). Baking soda B). Vinegar