Match the transformation in Column I with appropriate options is Column II{:(,"Column I",,"Column II"),((A),CO_(2)(s)rarrCO_(2)(g),(p),"Phase transition"),((B),CaCO_(3)(s)rarrCaO(s)+CO_(2),(q),"Allotropic change"),((C),2H• rarrH_(2)(g),(r),DeltaH" is positive"),((D),P_(("white,solid"))rarrP_(("red,solid")),(s),DeltaS" is positive"),(,,(t),DeltaS " is negative"):}

Match the transformation in Column I with appropriate options is Colum

1.	Match the transformation in Column I with appropriate options is Column II{:(,"Column I",,"Column II"),((A),CO_(2)(s)rarrCO_(2)(g),(p),"Phase transition"),((B),CaCO_(3)(s)rarrCaO(s)+CO_(2),(q),"Allotropic change"),((C),2H• rarrH_(2)(g),(r),DeltaH" is positive"),((D),P_(("white,solid"))rarrP_(("red,solid")),(s),DeltaS" is positive"),(,,(t),DeltaS " is negative"):}
Answer» Solution :(A) `CO_(2)(s)rarrCO_(2)(g)` It is phase TRANSITION. The process is ENDOTHERMIC (sublimation). Gas is produced, so entropy increases. (B) On heating `CaCO_(3)` decomposes, So, process is endothermic. The entropy increases as gaseous product is FORMED. (C) `2H•rarrH_(2)(g)` Entropy decreases as number of gaseous particles decreases. (D) It is phase transition White and RED P are allotropes Red P is more stable than white ,brgt So `DeltaG` is -ve