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Question

For the given three step endothermic reaction, which of the following statement(s) is/are correct?

A2(g)+B2(g)Step14C(g)Step23D(g)Step32E(g)

A
Step 1 is favoured by high temperature and low pressure
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B
Step 2 is favoured by low temperature and high pressure
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C
Step 2 is favoured by high pressure and high temperature
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D
Step 3 is favoured by high pressure and high temperature
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Solution

The correct options are
B Step 1 is favoured by high temperature and low pressure
C Step 2 is favoured by high pressure and high temperature
D Step 3 is favoured by high pressure and high temperature
According to Le Chatelier's principle, endothermic reactions are favoured at high temperature, while exothermic reactions are more favoured at lower temperatures.
If Δng>0, then the reaction is favourable at low pressure and if Δng<0, then the reaction is favourable at high pressure.

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