InterviewSolution
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InterviewSolution
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Match the transformation in colums I with appropriate options in column II. `{:("Column I" ,"Column II"),((A)CO_(2)(s) rarr CO_(2)(g),(p)"phase transition"),((B)CaCO_(3)(s)rarr CaO(s) + CO_(2)(g) ,(q)"allotropic change"),((C)2H.rarrH_(2)(g),(r)DeltaH "is positive"),((D)P_(("white, solid"))rarr P_(("red,solid")),(s)DeltaS "is positive"),(,(t) DeltaS "is negative"):}` |
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Answer» Correct Answer - A::B::C::D `(A) CO_(2)(s) rarr CO_(2)(g)` It is phase transition . The process is endothermic (sublimation). Gas is produced , so entropy increases. (B) On heating `CaCO_(2)` decomposes. So process is endothermic . The enthropy increases as gaseous product is formed. (C) `2H.rarr H_(2)(g)` Entropy decreases as number of gaseous particles decreases. (D) It is phase transition. Red P is more stable than while. So `DeltaH "is" -ve`. |
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