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