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Uses of Alkali Metals

Which of the ...

Question

Which of the following is used to prepare ${C l}_{2}$ gas at room temperature from concentrated $H C l$ ?

A

M n O_{2}

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B

H_{2} S

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C

K M n O_{4}

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D

{C r}_{2} O_{3}

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Solution

The correct option is D $K M n O_{4}$
$K M n O_{4}$ reacts with concentrated $H C l$ to produce chlorine gas.

$2 K M n O_{4} + 16 H C l ⟶ 2 K C l + 2 M n {C l}_{2} + 8 H_{2} O + 5 {C l}_{2}$

Hence, option $C$ is correct.

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Similar questions

Q. In the preparation of

C l_{2}

H C l

M n O_{2}

M n O_{2}

Q. Consider the following list of reagents:
Acidified

K_{2} {C r}_{2} O_{7}

K M n O_{4}, C u {S O}_{4}, H_{2} O_{2}, {C l}_{2}, O_{2}, F e {C l}_{2}, H {N O}_{3}

{N a}_{2} S_{2} O_{3}

. The total number of reagents that can oxidise aqueous iodide to iodine is:

M n O_{2} + 4 H C l \to 2 H_{2} O + M n {C l}_{2} + {C l}_{2}

The reaction of

M n O_{2}

H C l

2.24 L

{C l}_{2}

gas. What mass of

M n O_{2}

was used up by the reaction? (At. mass of

M n = 55 g / m o l

)

Q. Preparation of

C l_{2}

H C l

M n O_{2}

involves the process of :

M n O_{2} + 2 K C l O_{3} ⟶ K_{2} M n O_{4} + C l_{2} + 2 O_{2}

C l_{2} + K M n O_{4} ⟶ 2 K C l + M n O_{2} + O_{2}

Each reaction takes place to the extent of

50 %

11.2

O_{2}

at STP is obtained from

K C l O_{3}

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