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Abundance and Isotopes

Nascent hydro...

Question

Nascent hydrogen is obtained from reaction between :

A

N a

and

C_{2} H_{5} O H

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B

A l

and

N a O H

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C

Z n

and

d i l . H_{2} S O_{4}

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D

All of these

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Solution

The correct option is D All of these
Na + $C_{2} H_{5} O H \to C_{2} H_{5} O N a + [H]$

Al + 2NaOH $\to N a_{2} A l O_{2} + 2 [H]$

Zn + dil. $H_{2} S O 4 \to Z n S O_{4} + 2 [H]$

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Similar questions

Q. Methyl cyanide on reaction with sodium and

C_{2} H_{5} O H

Q. Acetaldoxime on reduction with

N a / C_{2} H_{5} O H

What is the mechanism of following reactions in the preparation of hydrogen:

Zn+2NaOH=Na₂ZnO₂ +H₂

2Al+2NaOH+2H₂O=2NaAlO₂ +3H₂

Sn+2NaOH+H₂O=Na₂ZnO₃+ 2H₂

Q. Identify X and Y in the following chemical reaction.

NaOH(aq) + X \to {Na}_{2} {ZnO}_{2} (aq) + Y

Z n, F e, C u

A l

are taken and added to the following solutions one by one. The results obtained are tabulated below:

Metal	$Z n S O_{4} (a q)$	$F e S O_{4} (a q)$	$C u S O_{4} (a q)$	$A l_{2} (S O_{4})_{3} (a q)$
$Z n$	-	Displaced	Displaced	No reaction
$F e$	No reaction	-	Displaced	No reaction
$C u$	No reaction	No reaction	-	No reaction
$A l$	Displaced	Displaced	Displaced	-

From the above data, the decreasing order of reactivity of metals is-

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