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(i) What class of drug is ranitidine ? ...

(i) What class of drug is ranitidine ?
(ii) If water contains dissolved `Ca^(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.

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(i) It is an antacid and helps in removing acidity of stomach.
(ii) As the water contain `Ca^(2+)` ions, therefore it is hard water. Hence synthetic detergents are preferred over the soaps for cleaning the clothes because calcium salts of detergents are soluble in water while calcium salts of soap are insoluble. As a result, lot of soap is wasted.
(iii) 0.2% solution of phenol is used as an antiseptic where as 1% solution of phenol acts as a disinfectant.
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