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Standard XII

Chemistry

Uses of Slaked Lime

When BeCl2 ...

Question

When $B e C l_{2}$ is hydrolysed, white fumes of gas are given out. The intensity of fumes intensifies when a rod dipped in moist ammonia is brought near the mouth of the test tube. The gas which comes out during hydrolysis is :

C l_{2}

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H C l

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N H_{4} O H

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N H_{4} C l

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Solution

The correct option is A $H C l$
$B e C l_{2} + 2 H_{2} O \to B e (O H)_{2} + 2 H C l (f l u m e s)$

$H C l + N H_{3} \to N H_{4} C l (i n t e n s e f l u m e s)$

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Similar questions

Q. Which of the following is an acidic gas which gives dense white fumes when the glass rod is dipped in ammonia solution and brought near it?

Q. Ammonia gas produces dense white fumes of ammonium chloride when a glass rod is dipped in HCl.

When conc. sulphuric acid is added to sodium chloride, sodium bisulphate and gas X is formed. If a rod dipped in ammonia is brought near gas X, dense white fumes of ammonium chloride are formed. What is X?

Q. An inorganic Lewis acid

(X)

fumes in moist air, and intensity of fumes increases when a rod dipped in

N H_{4} O H

is brought near to it. An acidic solution of

(X)

on addition of

N H_{4} C l

and

N H_{4} O H

gives a precipitate which dissolves in

N a O H

solution. An acidic solution of

(X)

does not give precipitate with

H_{2} S

. Hence, the compound

(X)

is :

Q. Explain the following: [5 MARKS]
(a) Thick white fumes are formed when a glass rod dipped in

N H_{4} O H

is brought near the mouth of a bottle full of HCl gas.
(b) Dry Hydrogen chloride gas does not affect a dry strip of blue litmus but turns red in the presence of a drop of water.
(c) Hydrogen Chloride gas is not collected over water.

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When BeCl2 is hydrolysed, white fumes of gas are given out. The intensity of fumes intensifies when a rod dipped in moist ammonia is brought near the mouth of the test tube. The gas which comes out during hydrolysis is :

The correct option is A HClBeCl2+2H2O→Be(OH)2+2HCl(flumes)HCl+NH3→NH4Cl(intenseflumes)

When $B e C l_{2}$ is hydrolysed, white fumes of gas are given out. The intensity of fumes intensifies when a rod dipped in moist ammonia is brought near the mouth of the test tube. The gas which comes out during hydrolysis is :

The correct option is A $H C l$
$B e C l_{2} + 2 H_{2} O \to B e (O H)_{2} + 2 H C l (f l u m e s)$

$H C l + N H_{3} \to N H_{4} C l (i n t e n s e f l u m e s)$