Home
Class 12
CHEMISTRY
Match the transformation in colums I wit...

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"):}`

Text Solution

Verified by Experts

The correct Answer is:
A `rarr` p, r, s; B `rarr` r, s; C `rarr` t ; D `rarr`p, q, t
(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
Promotional Banner

Similar Questions

Explore conceptually related problems

For the reaction : CaCO_(3) (s) hArr CaO (s) + CO_(2) (g)

For the reaction CaCO_(3(s)) hArr CaO_((s))+CO_(2(g))k_p is equal to

Delta S for the reaction , MgCO_(3)(s)rarr MgO(s)+CO_(2)(g) will be :

For the reaction, CaCO_(3)(s) rarr CaO(s)+CO_(2)(g) , which is the correct representation?

{:(,"Column-I",,"Column-II"),((a),C ("s,graphite")+0_(2)(g)rarrCO_(2)(g),(p),DeltaH^(@)_("Combustion")),((b),C("s,graphite")rarrC(g),(q),DeltaH^(@)_("combustion")),((c),CO(g)+(1)/(2)O_(2)(g)rarrCO_(2)(g),(r),DeltaH^(@)_("atomization")),((d),CH_(4)(g)rarrC(g)+4H(g),(s),DeltaH^(@)("sublimation")):}

Match the conversions in Column I with the type(s) of reaction(s) given in Column II. {:("Column I","ColumnII"),(A. "PbS"rarr"PbO",p. "Roasting"),(B. "CaCo"_(3)rarr"CaO",q. "Calcination"),(C. "ZnS"rarr"Zn",r. "Carbon reduction"),(D. "Cu"_(2)"S"rarr"Cu",s. "Self-reduction"):}