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Standard VI

Chemistry

Handpicking

There is a mi...

Question

There is a mixture of three solid compounds A, B and C. Out of these compounds A and C are soluble in water and compound C is sublimable also. In what sequence the following techniques can be used for their effective separation?

I Filtration

II Sublimation

III Crystallisation from water extract

IV Dissolution in water

(II), (I). (IV), (Ill)

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(IV), (I), (II), (III)

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(I), (II), (III), (IV)

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(II), (IV), (I), (III)

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Solution

The correct option is D
(II), (IV), (I), (III)

$S u b l e m a t i o n ↓ D i s s o l u t i o n ↓ F i l t r a t i o n ↓ C r y s t a l l i s a t i o n$

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Similar questions

Choose the most appropriate answer from the options given below :

(a) a mixture of sand and ammonium chloride can be separated by

(i) filtration

(ii) distillation

(iii) sublimation

(iv) crystallisation

(b) A pair of metalloids are

(i) Na and Mg

(ii) B and Si

(iii) C and P

(iv) He and Ar

(i) They are heterogeneous.

(ii) They are homogeneous.

(iii) They have definite molecular formulae.

(iv) They have fixed melting and boiling points.

(d) A solvent of Iodine is

(i) Water

(ii) Kerosene oil

(iii) Alcohol

(iv) Petrol

(e) Which of the gas is highly soluble in water ?

(i) Ammonia

(ii) Nitrogen

(iii) Carbon monoxide

(iv) Oxygen

Question 4

Which of the following are exothermic processes?

(i) Reaction of water with quicklime
(ii) Dilution of an acid
(iii) Evaporation of water
(iv) Sublimation of camphor (crystals)

(a) (i) and (ii)
(b) (ii) and (iii)
(c) (i) and (iv)
(d) (iii) and (iv)

Q. Arrange the following compounds in decreasing order of their reactivity with sodium methoxide in methanol at

50^{\circ}

Q. Arrange these compounds in order of increasing S_N1 reaction rate:

Q. Which of the following are compounds ?
(i) CO
(ii) No
(iii) NO
(iv) Co

(a) (i) and (ii)
(b) (ii) and (iii)
(c) (i) and (iii)
(d) (ii) and (iv)

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The correct option is D (II), (IV), (I), (III) Sublemation↓Dissolution↓Filtration↓Crystallisation

The correct option is D
(II), (IV), (I), (III)

$S u b l e m a t i o n ↓ D i s s o l u t i o n ↓ F i l t r a t i o n ↓ C r y s t a l l i s a t i o n$