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.
(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