Question

(i) What class of drug is Ranitidine ?
(ii) If water contains dissolved $C{a}^{2+}ions,$ out of soaps and synthetic detergents, which will you use for cleaning clothes ?
(iii) Which of the following is an antiseptic ?
0.2% phenol, 1% phenol.

Answer 1

(i) Antacid.

(ii) Water containing dissolved $C{a}^{2+}$ is hard. Synthetic detergents are preferred over soaps for cleaning clothes in hard water because calcium salts of detergents are soluble in water while calcium salts of soaps are insoluble. As a result, a lot of soap in water.

(iii) 0.2% phenol can be used as an antiseptic whereas 1% phenol can be used a disinfectant.