QAIPM-2011-Ch-1842: NEET 2011 Chemistry - Class 11 AIPM-2011-Ch-1842 Solution: If n = 6 the correct sequence for filling of electrons will be…

X 2(g) + 4Y 2(g) _ 2XY 4(g) _ n g = -ve and _ H = -ve As _ H < 0 i.e., the given reaction is exothermic. According to Le-Chatelier principle, for exothermic reaction, forward reaction is favoured when temperature becomes low. Also, there are 5 gaseous moles on reactant side and 2 gaseous moles on products side. So, forward reaction is favoured when pressure of the reaction mixture becomes high. The reason is that at high pressure reaction tends to more in direction where there is lessee number of gaseous moles.