5. Thermodynamics and thermochemistry — Chemistry STD 11 Science — Question

$A + B$ $\rightleftharpoons$ $C + D$ + heat

has reached equilibrium. The reaction may be made to proceed forward by

$(A)\,\,NH_4OH + NH_4Cl$       $(B)\,\,HCl + NaCl$

$(C)\,\,NH_4OH + HCl$ in $2 : 1\,mole$ ratio

Select the correct answer using the code given below