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) Beryllium carbonate is kept in the atmosphere fo carbon dioxide.
Reason (R) Beryllium carbonate is unstable and decomposes to give beryllium oxide and carbon dioxide.
(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

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Solution

Answer:

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

BeO is more stable than $B e C O_{3}$ due t small size and high polarising power of $B e^{2 +}$ As $B e C O_{3}$ is unstable and BeO is more stable thus, when $B e C O_{3}$ is kept in an atmosphere of $C O_{2}$ a reversible process takes place and stability of $B e C O_{3}$ increases.
$B e C O_{3} ⇌ B e O + C O_{2}$

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