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  • 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

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 B on 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 are respectively -

Option: 1

\mathrm{Na}, \mathrm{H}_{2}, \mathrm{NaOH}$ and $\mathrm{Zn} 


Option: 2

\mathrm{K}, \mathrm{H}_{2}, \mathrm{KOH}\: \text{and} \: \mathrm{Al}


Option: 3

\mathrm{Ca}, \mathrm{H}_{2}, \mathrm{Ca}(\mathrm{OH})_{2}$ and $\mathrm{Sn}


Option: 4

\mathrm{CaC}_{2}, \mathrm{C}_{2} \mathrm{H}_{2}, \mathrm{Ca}(\mathrm{OH})_{2}$ and $\mathrm{Sn}


Answers (1)

best_answer

\underset{\textup{(A)}}{\mathrm{Na}}+\mathrm{H}_{2} \mathrm{O} \rightarrow \underset{\textup{(C)}}{\mathrm{NaOH}}+\underset{\textup{(B)}}{\mathrm{H}_{2}}

\underset{\textup{(C)}}{\mathrm{NaOH}}+\underset{\textup{(D)}}{\mathrm{Zn}} \rightarrow \mathrm{Na}_{2} \mathrm{ZnO}_{2}+\underset{\textup{(B)}}{\mathrm{H}_{2}}

\underset{\textup{(D)}}{\mathrm{Zn}}+\mathrm{H}_{2} \mathrm{SO}_{4}$ (dil.) $\rightarrow \mathrm{ZnSO}_{4}+\underset{\textup{(B)}}{\mathrm{H}_{2}}

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Shailly goel

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