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 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 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 ANSWER DOWNLOAD EXAMIANS APP
Chemistry Where does the oxygen that keeps us alive come from? Carbonates absorbed from soil Carbon dioxide Water Oxides of minerals Carbonates absorbed from soil Carbon dioxide Water Oxides of minerals ANSWER DOWNLOAD EXAMIANS APP
Chemistry In chemical terms, what are alums used for purifying water for drinking purposes ? Hydrated chlorides Double sulphates Nitrates of aluminium Double nitrate Hydrated chlorides Double sulphates Nitrates of aluminium Double nitrate ANSWER DOWNLOAD EXAMIANS APP
Chemistry Brown stains in vessels and clothes indicate the presence of high quantities of ________ in water Manganese Magnesium None of these Calcium Manganese Magnesium None of these Calcium 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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