Question

In oxides of three elements, first element oxide produces milky colour on passing Ca(OH)2
Solution. Second element oxide produces blue colour on reaction with anhydrous CuSO4. While
aqueous solution of third oxide have pH less than seven. Then oxides of elements first, second
and third are respectively.
(A) C, N, P.
(B) H, N, Mg
(C) C, H, S
(D) CI, O, S​

Answer 1

Answer:

Option C

Explanation:

When CO2 is passed through Ca(OH)2 it produces milky colour.

When H2O is passed through anhydrous solution of CuSO4 it turns into CuO which is blue in colour. and SO2 has pH less than 7.

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