Assertion :Heat of neutralisation of strong acid and strong base is constant irrespective of nature of strong acid or the strong base. Reason: It is because strong acid and strong base are completely ionised in aqueous solution.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Neutralisation is the name given to the reaction that occurs between an Arrhenius acid and an Arrhenius base.
Molar heat (enthalpy) of neutralisation is the energy liberated per mole of water formed during a neutralisation reaction.
Molar heat of neutralisation for reactions between dilute aqueous solutions of strong acid and strong base is always the same as no bonds need to be broken, but making the H-O bonds in $H_{2} O$ releases energy.

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Similar questions

Q. Assertion :The heat of neutralisation is constant for any strong acid and strong base reaction. Reason: Strong acids and strong bases will completely ionise at any concentration.

Assertion (A) Ethanol is a weaker acid than phenol.
Reason (R) Sodium ethoxide may be prepared by the reaction of ethanol with aqueous NaOH.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

Assertion (A) Rate constant determined from Arrhenius equation are fairly accurate for simple as well as complex molecules.

Reason (R) Reactant molecules undergo chemical change irrespective of their orientation during collision.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

Q. Assertion :Heat of neutralisation of nitric acid with

N a O H

is same to that of

H C l

and

N a O H

. Reason: In both cases strong acid and strong base are neutralised.

H^{+} + {O H}^{-} \to H_{2} O

Assertion (A) Like bromination of benzene, bromination of phenol is also carried out in the presence of Lewis acid.
Reason (R) Lewis acid polarises the bromine molecule.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

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