Q. 454.0( 1 Vote )

In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below each question.

Assertion (A): Beryllium carbonate is kept in the atmosphere of carbon dioxide.

Reason (R) : Beryllium carbonate is unstable and decomposes to give beryllium oxide and carbon dioxide.

(i) Both A and R are correct and R is the correct explanation of A.

(ii) Both A and R are correct but R is not the correct explanation of A.

(iii) Both A and R are not correct.

(iv) A is not correct but R is correct.

Answer :

(i) Both A and R are correct and R is the correct explanation of A.

Explanation: All alkaline earth metal carbonates are stable at room temperature except beryllium carbonate. It decomposes to give BeO and CO2, hence it is kept in a CO2 atmosphere so that the equilibrium shifts to the right of the equation.


BeCO3 BeO + CO2


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