Chemistry Assertion (A) : Synthetic detergents can lather wen in hard water.Reason (R) : Synthetic detergents form soluble calcium and magnesium salts with hard water. 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 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 ANSWER DOWNLOAD EXAMIANS APP
Chemistry Where does the oxygen that keeps us alive come from? Carbon dioxide Water Carbonates absorbed from soil Oxides of minerals Carbon dioxide Water Carbonates absorbed from soil Oxides of minerals ANSWER DOWNLOAD EXAMIANS APP
Chemistry In chemical terms, what are alums used for purifying water for drinking purposes ? Hydrated chlorides Nitrates of aluminium Double sulphates Double nitrate Hydrated chlorides Nitrates of aluminium Double sulphates Double nitrate ANSWER DOWNLOAD EXAMIANS APP
Chemistry Brown stains in vessels and clothes indicate the presence of high quantities of ________ in water None of these Magnesium Calcium Manganese None of these Magnesium Calcium Manganese ANSWER DOWNLOAD EXAMIANS APP
Chemistry If water smells bad, then that odour can be removed by adding Alum Deactivated nitrogen Bleach Activated carbon Alum Deactivated nitrogen Bleach Activated carbon ANSWER DOWNLOAD EXAMIANS APP
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