Assertion :The carbonate of lithium decomposes easily on heating. Reason: Lithium being very small in size polarises large carbonate ion leading to the formation of more stable $L i_{2} O$ and $C O_{2}$ .

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
The carbonate of lithium decomposes easily on heating because lithium being very small in size can not polarize the large $C O_{3}^{2 -}$ ion but rather can polarize the $O_{2}^{2 -}$ ion and forms stable $L i O$ and $C O_{2}$ .

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Similar questions

Q. Assertion : The carbonate of lithium decomposes easily on heating to form lithium oxide and

C O_{2}

.
Reason : Lithium being very small in size polarises large carbonate ion leading to the formation of more stable

L i_{2} O

and

C O_{2}

In the following question, a statement fo Assertion (A) followed by a statement fo Reason (R ) is given. Choose the correct option out of the choices given below in each question
Assertion (A) the carbonate of lithium decomposes easily on heating to form lithium oxide and $C O_{2}$
Reason (R) Lithium being very small in size polarises large carbonate ion leading to the formation of more stable $L i_{2} O a n d C O_{2}$
(a) Both A and R are correct and R is the correct Explanation of A
(b) Both A and R are correct but R is not the correct explanation Of A
(c) Both A and R are not Correct
(d) A is not correct but R is correct

Assertion (A) Phenol forms 2, 4, 6-tribromophenol on treatment with $B r_{2}$ in carbon disulphide at 273K.
Reason (R) Bromine polarises in carbon disulphide.
(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 – The non-fusible impurities present in iron ore are removed by $C a C O_{3}$ .

Reason: $C a C O_{3}$ which decomposes into $C a O$ and $C O_{2}$ . The $C a O$ formed reacts with $S i O_{2}$ to remove silica

Q. Assertion : Two electrons of helium atom are placed in only one shell but three electrons of lithium need two shells.
Reason: A shell can have maximum

{2n}^{2}

electrons.

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Assertion :The carbonate of lithium decomposes easily on heating. Reason: Lithium being very small in size polarises large carbonate ion leading to the formation of more stable Li2O and CO2.

Assertion :The carbonate of lithium decomposes easily on heating. Reason: Lithium being very small in size polarises large carbonate ion leading to the formation of more stable $L i_{2} O$ and $C O_{2}$ .