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Current Affairs January 2024

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4

A mixture of ethyl alcohol and water can be separated by

A. evaporation

B. sublimation

C. using a separating funnel

D. fractional distillation

Correct Answer :

D. fractional distillation


Related Questions

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4

Cholesterol is

A. a carbohydrate

B. a protein

C. a lipid

D. a hormone

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4

Compounds of nitrogen with metals are called

A. nitrates

B. nitrites

C. hyponitrates

D. nitrides

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4

The sugar which is used in silvering mirrors is

A. sucrose

B. maltose

C. glucose

D. fructose

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4

Hydrogen gas has

A. a very sweet smell

B. a very pungent smell

C. an irritating smell

D. no smell at all

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4

The purest form of carbon is

A. animal charcoal

B. coal

C. wood charcoal

D. sugar charcoal

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4

Grape sugar is another name for

A. glucose

B. fructose

C. sucrose

D. maltose

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4

Ascorbic acid is the chemical name for

A. Vitamin B6

B. Vitamin C

C. Vitamin K

D. Vitamin D

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Which of the following process involves removal of the elements of water?

A. Hydrolysis

B. Hydrogenation

C. Dehydration

D. Dehydrogenation

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4

The alloy which is extremely hard and resistant to acids is

A. chrome steel

B. silicon steel

C. stainless steel

D. invar

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4

The fertilizer which has the largest percentage of nitrogen is

A. urea

B. ammonium nitrate

C. ammonium sulphate

D. calcium cyanamide

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4

The Carbon dioxide is absorbed by

A. Palladium

B. NaCI

C. KOH

D. Dilute H2SO4

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4

In the mouth, starch is converted into ______ by the action of saliva.

A. sucrose

B. glucose

C. fructose

D. mannose

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4

Concrete is a mixture of

A. cement an limestone

B. cement and sand

C. cement and gravel

D. cement, sand and gravel

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4

Annealing of glass is done in

A. a cupel

B. a long narrow chamber

C. an open furnace

D. a closed furnace

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4

Optical instruments are made of

A. pyrex glass

B. flint glass

C. quartz glass

D. Crooke's glass

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4

The percentage of silver in German silver is

A. ten

B. twenty

C. zero

D. fifty

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4

Riboflavin deficiency causes

A. tongue inflammation

B. pellagra

C. night blindness

D. anaemia

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4

An important use of nitrous acid is in

A. the manufacture of explosives

B. the manufacture of dyes

C. refrigerators

D. the preparation of drugs

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4

When ants bite, they inject

A. glacial acetic acid

B. methanol

C. formic acid

D. stearic acid

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4

Smelling salt contains

A. ammonium chloride

B. ammonium carbonate

C. ammonium sulphate

D. potassium nitrate

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4

Nylon is made from

A. terephthalic acid and ethylene glycol

B. hexamethylene diamine and adipic acid

C. cellulose nitrate

D. cellulose acetate

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4

The formula for cane sugar is

A. C6H12O6

B. C2H5OH

C. C12H22O11

D. C7H8O

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4

Which of the following is called 'the King of Chemicals?

A. Nitric acid

B. Hydrochloric acid

C. Silver nitrate

D. Sulphuric acid

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4

The scientist associated with the discovery of the nucleus was

A. Rutherford

B. Moseley

C. Niels Bohr

D. J.J. Thomson

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4

Which of the following metals is the best conductor of heat and electricity?

A. Aluminium

B. Silver

C. Copper

D. Magnesium

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4

The substance most abundantly found in sea water is

A. magnesium chloride

B. sodium chloride

C. calcium sulphate

D. potassium chloride

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4

Tincture iodine is

A. a disinfectant

B. an analgesic

C. a hypnotic

D. a dye

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4

Plastics are synthetic

A. rubbers

B. fibres

C. resins

D. sugars

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4

Heavy water was discovered by

A. TW Richards

B. FW Aston

C. Stas

D. Urey

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Which one of the following gases is extremely soluble in water?

A. Carbon dioxide

B. Ammonia

C. Chlorine

D. Hydrogen sulphide