8.3. Organic chemistry purification and characterization - Rajasthan Board (RBSE) STD 11 Science Chemistry Questions - Vidyadip

Question types

8.3. Organic chemistry purification and characterization question types

227 questions across 1 question group — pick any mix to generate a Chemistry paper with step-by-step answer keys.

227

Questions

1

Question groups

5

Question types

M.C.Q (1 Marks)

Sample Questions

8.3. Organic chemistry purification and characterization questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1M.C.Q (1 Marks)1 Mark

On heating, some solid substances change from solid to vapour state without passing through liquid state. The technique used for the purification of such solid substances based on the above principle is known as

✓
Sublimation
B
Distillation
C
Chromatography
D
Crystallization

Answer: A.

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Q 2M.C.Q (1 Marks)1 Mark

In Lassaigne's extract of an organic compound, both nitrogen and sulphur are present, which gives blood red colour with $Fe ^{3+}$ due to the formation of-

A
$[ Fe ( SCN )]^{2+}$
B
$Fe _4\left[ Fe \left( CN _6\right)\right]_3 xH _2 O$
✓
$NaSCN$
D
$\left[ Fe ( CN )_5 NOS \right]^{4-}$

Answer: C.

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Q 3M.C.Q (1 Marks)1 Mark

The Kjeldahl's method for the estimation of nitrogen can be used to estimate the amount of nitrogen in which one of the following compounds?

A
✓
C
D

Answer: B.

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Q 4M.C.Q (1 Marks)1 Mark

A liquid compound ($x$) can be purified by steam distillation only if it is

A
Not steam volatile, immiscible with water
✓
Steam volatile, immiscible with water
C
Not steam volatile, miscible with water
D
Steam volatile, miscible with water

Answer: B.

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Q 5M.C.Q (1 Marks)1 Mark

Paper chromatography is an example of

A
Column chromatography
B
Adsorption chromatography
✓
Partition chromatography
D
Thin layer chromatography

Answer: C.

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