Number of molecules of water of crystallization in copper sulphate, sodium carbonate and Gypsum are
[amp_mcq option1=”5, 10 and 2 respectively” option2=”10, 2 and 5 respectively” option3=”5, 2 and 10 respectively” option4=”2, 5 and 10 respectively” correct=”option1″]
This question was previously asked in
UPSC NDA-2 – 2020
– Copper sulphate exists commonly as copper(II) sulphate pentahydrate, CuSO4·5H2O, which has 5 molecules of water.
– Sodium carbonate exists commonly as sodium carbonate decahydrate (washing soda), Na2CO3·10H2O, which has 10 molecules of water.
– Gypsum is calcium sulphate dihydrate, CaSO4·2H2O, which has 2 molecules of water.