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When a substance A reacts with water it ...

When a substance A reacts with water it produces a combustible gas B and a solution of a substance C in water. When another substance D reacts with this solution of C, it also produces the same gas Bon warming, but D can produce B on reaction with dilute sulphuric acid at room temperature. A imparts a deep golden yellow colour to a smokeless flame of Bunsen burner. A, B, C and D respectively are:

A

`Na,H_2,NaOH and Zn`

B

`K,H_2,KOH and Al`

C

`Ca,H_2,Ca(OH)_2 and Sn`

D

`CaC_2,C_2H_2,Ca(OH)_2` and Sn

Text Solution

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The correct Answer is:
A
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