Q65 / 200 · NEET 2011 (Screening) · Chemistry

The value of $\Delta H$ for the raction $X_2(g)+4 Y_2(g)^{39} 2 X Y_4(g)$ is less than zero. Formation of $X Y_4(g)$ will be favoured at

  • A
    low pressure and low temperature
  • B
    high temperature and low pressure
  • Correct answer
    C
    high pressure and low temperature
  • D
    high temperature and high pressure

Solution

$$ \begin{aligned} & X_2(g)+4 Y_2 \rightleftharpoons 2 X Y_4(g) \\ & \Delta H < 0 \text { and } \Delta n < 0 \end{aligned} $$ $\therefore$ The forward reaction is favoured at high pressure and low temperature. (According to co-chatelie's principle)

Hence, the correct answer is option: 'C'.

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