Q.

When 22.4 litres of H2(g) is mixed with 11.2 litres of Cl2(g), each at STP, the moles of HCl(g) formed is equal to               [2014]

1 1 mol of HCl(g)  
2 2 mol of HCl(g)  
3 0.5 mol of HCl(g)  
4 1.5 mol of HCl(g)  

Ans.

(1)

1 mole  22.4 litres at STP.

nH2=22.422.4=1 mol;  nCl2=11.222.4=0.5 mol

Reaction is as,

Here, Cl2 is the limiting reagent. So, 1 mole of HCl(g) is formed.