MCQ
For chemical reactions, the calculation of change in entropy is normally done
- AAt constant pressure
- BAt constant temperature
- ✓At constant temperature and pressure both
- DAt constant volume
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$(I) \,CO_3^{-2}$ $(II)\, XeF_4$
$(III)\, I^-_3$ $(IV)\, NCl_3$
$(V)\, BeCl_2$

$A.$ $I _2( g ) \rightarrow 2 I ( g )$
$B.$ $HCl ( g ) \rightarrow H ( g )+ Cl ( g )$
$C.$ $H _2 O ( l ) \rightarrow H _2 O ( g )$
$D.$ $C ( s )+ O _2( g ) \rightarrow CO _2( g )$
$E.$ Dissolution of ammonium chloride in water