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 but R is not a correct explanation of A A is true but R is false Both A and R is true and R is the correct explanation of A A is false but R is true Both A and R is true but R is not a correct explanation of A A is true but R is false Both A and R is true and R is the 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? Water Carbon dioxide Carbonates absorbed from soil Oxides of minerals Water Carbon dioxide 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 ? Double sulphates Hydrated chlorides Double nitrate Nitrates of aluminium Double sulphates Hydrated chlorides Double nitrate Nitrates of aluminium ANSWER DOWNLOAD EXAMIANS APP
Chemistry Brown stains in vessels and clothes indicate the presence of high quantities of ________ in water Calcium None of these Magnesium Manganese Calcium None of these Magnesium Manganese ANSWER DOWNLOAD EXAMIANS APP
Chemistry If water smells bad, then that odour can be removed by adding Activated carbon Alum Deactivated nitrogen Bleach Activated carbon Alum Deactivated nitrogen Bleach ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS