A reaction takes place in a several sequential steps A,B,C and D. the vlaue of enthalpy change for sequential steps are p,q,r and s respectively. If A and C have equal values of enthalpy change with total enthalpy change is t, then choose the incorrect statement among the following.

A reaction takes place in a several sequential steps A,B,C and D. the

1.	A reaction takes place in a several sequential steps A,B,C and D. the vlaue of enthalpy change for sequential steps are p,q,r and s respectively. If A and C have equal values of enthalpy change with total enthalpy change is t, then choose the incorrect statement among the following.
Answer» `q=r` `q+r=t-(s+p)` `2q=t-(s+p)` `q+r=p+s` SOLUTION :According to the question, the diagramatic representation of given reaction can be drawn as As given, q=r[Hence, (a) is correct] USING concept of Hess's law `t=p+q+r+s` `therefore q+r=t-(s+p)`[hence (b) is correct] `2q=t-(s+p)`[hence (C) is correct] `[becauseq=r]` but q+r=p+s is INCORRECT because EXACT amount of enthalpy change for each step is not given.