**Match the following compounds with the percentage of oxygen by mass:**

**Column I:**
(A)
(B)
(C)
(D)

**Column II:**
(P)
(Q)
(R)
(S)

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Question

**Match the following compounds with the percentage of oxygen by mass:**

**Column I:**
(A) $H_2O$
(B) $NaOH$
(C) $MgO$
(D) $CO_2$

**Column II:**
(P) $40\%$
(Q) $88.8\%$
(R) $72.7\%$
(S) $40\%$

Prashant Kotian · Accepted Answer

Correct answer: (A) $\RIGHTARROW$ Q
(B) $\RIGHTARROW$ P
(C) $\RIGHTARROW$ S
(D) $\RIGHTARROW$ R. **(A)** (Q).
**(B)** (P).
**(C)** (S).
**(D)** (R).

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