You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard XII

Chemistry

Sulphuric Acid

A solution of...

Question

A solution of colorless salt H on boiling with excess NaOH produces a non-flammable gas. The gas evolution ceases after sometime upon addition of Zn dust to the same solution, the gas evolution restarts. The colourless salt(s) H is(are) :

N H_{4} N O_{3}

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

N H_{4} N O_{2}

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

N H_{4} C l

No worries! We‘ve got your back. Try BYJU‘S free classes today!

(N H_{4})_{2} S O_{4}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct options are
B $N H_{4} N O_{2}$
C $N H_{4} N O_{3}$
Option (A), (B) are correct.
The colorless salt H is either $N H_{4} N O_{3}$ or $N H_{4} N O_{2}$ . The colorless salt produces $N H_{3}$ gas (non-inflammable) on boiling with excess of $N a O H$ . On addition of zinc dust (a reducing agent) to this solution, sodium nitrite or sodium nitrate will liberate $N H_{3}$ gas again.
$N H_{4} N O_{3} + N a O H ⟶ N H_{3} + N a N O_{3} + H_{2} O$
$7 N a O H + N a N O_{3} + 4 Z n ⟶ 4 N a_{2} Z n O_{2} + N H_{3} + 2 H_{2} O$

$N H_{4} N O_{2} + N a O H ⟶ N a N O_{2} + N H_{3} + H_{2} O$
$3 Z n + 5 N a O H + N a N O_{2} ⟶ 3 N a_{2} Z n O_{2} + N H_{3}$

Suggest Corrections

Similar questions

Q. A solution of colourless salt 'S' on boiling with excess

N a O H

produces a non-flammable gas. The evolution of the gas ceases after sometime. Upon addition of

Z n

dust to the same solution, the gas is evolved again. The colourless salt(s) 'S' can be:

1.13 g

of an ammonium salt was boiled with

100 m L

N

N a O H

solution till the evolution of ammonia gas was given off.

60 m L

N

H_{2} {S O}_{4}

were required to neutralize the excess of

N a O H

present in remaining solution. Find out the % of

{N H}_{3}

in the salt.

Two platinum electrodes were immersed in a solution of CuSO $_{4}$ and current was passed through the solution. After sometime it was found that colour of CuSO $_{4}$ disappeared with the evolution of gas at the electrode. The colourless solution contains:

Q. Two platinum electrodes were immersed in a solution of cupric sulphate and electric current passed through the solution. After sometime it was found that the colour of copper sulphate disappeared with evolution of gas at the electrode.

The colourless solutions contains:

Q. A white amorphous powder (A) on heating yields a colourless, non combustible gas (B) and a solid (C). The later compound assumes a yellow colour on heating and changes to white on cooling. (C) dissolves in dilute acid and the resulting solution gives a white ppt. on adding K

_{4}

[Fe(CN)

_{6}

] solution. (A) dissolves in dilute HCl with evolution of gas, which is identical in all respect to (B). The gas (B) turns lime water milky, but the milkiness disappears with the continuous passage of gas. The solution of (A) as obtained above gives a white precipitate (D) on the addition of excess NH

_{4}

OH and passing H

_{2}

S. Another portion of the solution initially gives a white precipitate (E) on the addition of NaOH solution, but dissolves on further addition of the base. Identify (A) to (E) :

Join BYJU'S Learning Program