JEE Advanced levelSingle correct optionDifficulty 3 of 3ph105
10.65g of ClX2 reacts with excess ammonia according to 8NHX3+3ClX26NHX4Cl+NX2. Taking N=14, H=1 and Cl=35.5, the mass of NHX4Cl formed is
A24.08g
B16.05g
C32.10g
D8.03g
Answer: B
Moles of ClX2=10.65/71=0.15. The equation gives 6 mol NHX4Cl per 3 mol ClX2, i.e. 2 mol per mol, so 0.30 mol NHX4Cl. Molar mass is 53.5, so mass =16.05g.