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The reaction of an element A with water ...

The reaction of an element A with water produces combustible gas B and an aqueous solution of C. When another substance D reacts with this solution C also produces the same gas B.D also produces the same gas even on reaction with dilute `H_2 SO_4` at room temperature. Element A imparts golden yellow colour to Bunsen flame. Then A,B,C and D may be identified as

A

`Na,H_2, NaOH and Zn`

B

`K,H_2,KOH and Zn`

C

`K,H_2 NaOH and Zn`

D

`Ca,H_2 CaCOH_2 and Zn`

Text Solution

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The correct Answer is:
A
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