Question

please answer these questions .These are one mark questions from class 10 acids, bases and salts​

Answer 1

Answer:

12. We feel a burning sensation when we overeat because when we overeat hydrochloric acid is released in a big quantity. Hydrochloric acid is a powerful acid so it causes a burning sensation.

Answer 2

Answer:

12. Burning sensation in the stomach is due to excess of HCl in the stomach.

13. Substances having water of crystalisation are:

i) CuSO4.7H2O - Copper Sulfate Heptahydrate

ii)Na2CO3. 10H2O - Washing soda Or sodium carbonate decahydrate

14. Universal Indicator - Universal indicator is a mixture of many indicators which gives us the nature of the solution and the pH of the solution.

15. Uses of washing soda:

1 ) It is used to remove permanent hardness of water.

2) It is used in the manufacture of glass,soap,paper.

16..

1. Testube A show vigorous reaction

2. Because acidic strength of H2​SO4​ is more than H2​CO3​

3.Hydrogen gas is liberated in both reactions.

4.

Mg+H2SO4------->MgSO4+H2

Mg+H2Co3----->MgCO3 +H2.