Equilibrium Question 652

Question: 56 g of nitrogen and 8 g hydrogen gas are heated in a closed vessel. At equilibrium 34 g of ammonia are present. The equilibrium number of moles of nitrogen, hydrogen and ammonia are respectively [KCET 2004]

Options:

A) 1,2,2

B) 2,2,1

C) 1,1,2

D) 2,1,2

Show Answer

Answer:

Correct Answer: C

Solution:

N2+3H22NH3 -.. (i) at t=0

56,gm

8gm

0gm = 2mole

4mole

0mole at equilibrium 21

43

34gm = 1,mole = 1,mole = 2,mole According to eq. (i) 2 mole of ammonia are present & to produce 2 mole of NH3 , we need 1 mole of N2 and 3 mole of H2 hence 21=1 mole of N2 and 43=1 mole of H2 are present at equilibrium in vessel.



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