Question

(40.) 0.9 g Al reacts with dil. HCI to give H^2 . The volume of H^2, evolved at STP is (Atomic weight of Al = 27
(1) 1.12 litre
(2) 2.24 litre
(3) 3.33 litre
(4) 4.44 litre​

Answer 1

Answer:

1.12

Explanation:

number of moles of al=0.9/27

=1/30 moles

Al+HCl gives rise to AlCl3+H2

the balanced reaction is

2Al+6HCl gives rise to 2AlCl3+3H2

2 moles of al are moles  needed for 3 moles of h2

so 1/20 moles of h2 are required for 1/30 moles of al.

1/20*22.4=1.12