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Q.

Select the option which is correct regarding true/false of the given statements :
Statement-1: Thermal decomposition of solid CaCO3 is expected to be spontaneous as high temperatures and non-spontaneous at low temperatures.
Statement-2: If the rate law for an acid catalysed reaction is  r = K [Reactant] 1 [Catalyst] °  then rate will be independent of presence / absence of catalyst.

Statement-3: When water freezes in a glass beaker, volume of the system increases at constant temperature and hence entropy will also increase.

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a

 Only statement-1 is correct 

b

Only statement-2 incorrect

c

Only statement-3 is incorrect

d

 All statements are correct 

answer is C.

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Detailed Solution

The value of G° will be negative and the decomposition reaction will be spontaneous at any temperature greater than 835°C.

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Select the option which is correct regarding true/false of the given statements :Statement-1: Thermal decomposition of solid CaCO3 is expected to be spontaneous as high temperatures and non-spontaneous at low temperatures.Statement-2: If the rate law for an acid catalysed reaction is  r = K [Reactant] 1 [Catalyst] °  then rate will be independent of presence / absence of catalyst.Statement-3: When water freezes in a glass beaker, volume of the system increases at constant temperature and hence entropy will also increase.