Question

(i) Name the reaction when HCl and NaOH combined. (ii) What is the use of Na 2 CO 3 ? (iii) Which one is strong acid and strong base? (iv) What is the use of NaHCO 3 ? (v) What is the use of CaSO 4 . ½ H 2 O? (vi) What is the use of CaOCl 2 ?

Answer 1

1) neutrilisation reaction

2) it is called washing soda and is used for cleansing purpose

3) HCl is strong acid and NaOH is strong base

4) it is called baking soda and is used for baking purpose

5) IT IS CALLED PLASTER OF PARIS AND IS USED FOR MAKING TOYS

6) it is known as bleaching powder and is used as disinfectant of water