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Byju's Answer

Standard IX

Chemistry

Hydrated Salts

A imparts gre...

Question

$A$ imparts green color to the flame. Its solution does not give a precipitate on passing $H_{2} S$ . When it is heated with solid $K_{2} C r_{2} O_{7}$ and conc. $H_{2} S O_{4}$ , reddish brown gas is evolved. The gas when passed in an aqueous solution of $N a O H$ turns it yellow. Find out $A$ .

H g C l_{2}

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B a C l_{2}

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Both (A) and (B)

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None of the above

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Solution

The correct option is B $B a C l_{2}$

$B a^{2 +}$ ions imparts green color to the flame. Its solution does not give a precipitate on passing $H_{2} S$ .

When it is heated with solid $K_{2} C r_{2} O_{7}$ and conc. $H_{2} S O_{4}$ , it gives $C r O_{2} C l_{2}$ reddish brown gas is evolved.

The gas, when passed in an aqueous solution of $N a O H$ , turns yellow.

Option B is correct.

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Similar questions

Q. Two solid laboratory reagents (A) and (B) gives the following reactions:
Compound (A):
(i) on strongly heating gives two oxides of sulphur
(ii) on adding aqueous NaOH solution to its aqueous solution, a dirty green precipitate is obtained which starts turning brown on exposure to air
Compound (B) :
(iii) imparts green colour to the flame
(iv) Its solution does not give a precipitate on passing

H_{2} S

(v) When it is heated with solid

K_{2} C r_{2} O_{7}

and concentrated

H_{2} S O_{4}

, a red gas is evolved. The gas when passed in an aq NaOH solution turns it yellow
Compound (A) and (B) are identified as

F e S O_{4}

and

B a C l_{2}

.
If true enter 1, else enter 0.

When a white crystalline compound X is heated with

K_{2} C r_{2} O_{7}

and concentrated

H_{2} S O_{4}

, a reddish brown gas A is evolved. On passing A into caustic soda solution, a yellow-colored solution B is obtained. Neutralizing the solution of B with acetic acid and on subsequent addition of lead acetate, a yellow precipitate C is obtained. When X is heated with

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solution, a colorless gas is evolved and on passing this gas into

K_{2} H g I_{4}

solution, a reddish-brown precipitate D is formed.

Identify D.

Q. An aqueous solution of salt (A), gives white crystalline precipitate (B) with

N a C l

solution. The filtrate gives a black precipitate (C) when

H_{2} S

is passed through it. Compound (B) is dissolves in hot water and the solution gives a yellow precipitate (D) on treating with

N a I

and cooling. The compound (A) does not give any gas with dilute

H C l

but liberates reddish brown gas on heating.

Compound (A) is _________.

Q. When

H_{2} S

gas is passed through

H C l

containing aqueous solution of

C u C l_{2}

H g C l_{2}

B i C l_{2}

, and

C o C l_{2}

, it does not precipitate out:

Q. An aqueous solution of a gas

(X)

gives the following reactions :
(i) It turns an acidified

K_{2} C r_{2} O_{7}

solution green.
(ii) On boiling it with

H_{2} O_{2}

, cooling it and then adding an aqueous solution of

B a C l_{2}

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(iii) On passing

H_{2} S

in the solution a white turbidity is obtained.
Identify (X).

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A imparts green color to the flame. Its solution does not give a precipitate on passing H2S. When it is heated with solid K2Cr2O7 and conc. H2SO4, reddish brown gas is evolved. The gas when passed in an aqueous solution of NaOH turns it yellow. Find out A.

$A$ imparts green color to the flame. Its solution does not give a precipitate on passing $H_{2} S$ . When it is heated with solid $K_{2} C r_{2} O_{7}$ and conc. $H_{2} S O_{4}$ , reddish brown gas is evolved. The gas when passed in an aqueous solution of $N a O H$ turns it yellow. Find out $A$ .