JEE Advanced 2018 — Paper 1 — Question 20

The ammonia prepared by treating ammonium sulphate with calcium hydroxide is completely used by

$\mathrm{NiCl}_{2} \cdot 6 \mathrm{H}_{2} \mathrm{O}$ to form a stable coordination compound. Assume that both the reactions are $100 \%$ complete.

If 1584 g of ammonium sulphate and 952 g of $\mathrm{NiCl}_{2} \cdot 6 \mathrm{H}_{2} \mathrm{O}$ are used in the preparation, the combined weight

(in grams) of gypsum and the nickel-ammonia coordination compound thus produced is $\_\_\_\_$ .

(Atomic weights in $\mathrm{g} \mathrm{mol}^{-1}: \mathrm{H}=1, \mathrm{~N}=14, \mathrm{O}=16, \mathrm{~S}=32, \mathrm{Cl}=35.5, \mathrm{Ca}=40, \mathrm{Ni}=59$ )