Chemistry Assertion (A) : Synthetic detergents can lather wen in hard water.Reason (R) : Synthetic detergents form soluble calcium and magnesium salts with hard water. Both A and R is true and R is the correct explanation of A Both A and R is true but R is not a correct explanation of A A is false but R is true A is true but R is false Both A and R is true and R is the correct explanation of A Both A and R is true but R is not a correct explanation of A A is false but R is true A is true but R is false ANSWER DOWNLOAD EXAMIANS APP
Chemistry Where does the oxygen that keeps us alive come from? Oxides of minerals Carbonates absorbed from soil Carbon dioxide Water Oxides of minerals Carbonates absorbed from soil Carbon dioxide Water ANSWER DOWNLOAD EXAMIANS APP
Chemistry In chemical terms, what are alums used for purifying water for drinking purposes ? Double nitrate Nitrates of aluminium Double sulphates Hydrated chlorides Double nitrate Nitrates of aluminium Double sulphates Hydrated chlorides ANSWER DOWNLOAD EXAMIANS APP
Chemistry Brown stains in vessels and clothes indicate the presence of high quantities of ________ in water Magnesium Calcium Manganese None of these Magnesium Calcium Manganese None of these ANSWER DOWNLOAD EXAMIANS APP
Chemistry If water smells bad, then that odour can be removed by adding Deactivated nitrogen Activated carbon Alum Bleach Deactivated nitrogen Activated carbon Alum Bleach ANSWER DOWNLOAD EXAMIANS APP
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