Observe the following statements:

I. Bleaching powder is used in the preparation of chloroform.
II. Bleaching powder decomposes in the presence of $C o C l_{2}$ to liberate $O_{2}$ .
III. Aqueous $K H F_{2}$ is used in the preparation of fluorine.

The correct combination is:

I, II and III are correct

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Only II is correct

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Only I and III are correct

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Only I and II are correct

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Solution

The correct option is A I, II and III are correct
I. ${2 C a O C l}_{2} + {C H}_{3} {C O C H}_{3} \to {2 C H C l}_{3} + {C a (O H)}_{2} + {C H}_{3} C O O C a$

II. Bleaching powder when catches fire decomposes without giving oxygen which further intensifies the fire. It was found that high grade calcium hypochlorite can be decomposed by giving out calcium chloride and oxygen at a particular temperature.

III.Flourine is prepared by the electrolysis of fused acid potassium flouride at 373K in a copper vessel using graphite electrodes.

Option A is correct.

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Similar questions

Q. Observe the following statements.
I .Bleaching powder is used in the preparation of chloroform.
II. Bleaching powder decomposes in the presence of

C o C 1_{2}

to liberate

O_{2}

.
III. Aqueous

K H F_{2}

is used in the preparation of fluorine.

Question 11.
Common salt besides being used in kitchen can also be used as the raw material for making
(i) washing soda
(ii) bleaching powder
(iii) baking soda
(iv) slaked lime

Choose the correct option from the following:
(a) (i) and (ii)
(b) (i), (ii) and (iv)
(c) (i) and (iii)
(d) (i), (iii) and (iv)

Question 11.
Common salt besides being used in kitchen can also be used as the raw material for making
(i) washing soda
(ii) bleaching powder
(iii) baking soda
(iv) slaked lime

Choose the correct option from the following:
(a) (i) and (ii)
(b) (i), (ii) and (iv)
(c) (i) and (iii)
(d) (i), (iii) and (iv)

Q. In the presence of the following, bleaching powder decomposes to liberate oxygen:

Q. In the presence of cobalt chloride

(C o {C l}_{2})

, bleaching powder decomposes to form :

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Observe the following statements:I. Bleaching powder is used in the preparation of chloroform.II. Bleaching powder decomposes in the presence of CoCl2 to liberate O2.III. Aqueous KHF2 is used in the preparation of fluorine.The correct combination is:

Observe the following statements:

I. Bleaching powder is used in the preparation of chloroform.
II. Bleaching powder decomposes in the presence of $C o C l_{2}$ to liberate $O_{2}$ .
III. Aqueous $K H F_{2}$ is used in the preparation of fluorine.

The correct combination is: