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Current Affairs January 2024

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Quick lime has the formula

A. CaO

B. Ca(OH)2

C. NaOH

D. Na2CO3

Correct Answer :

A. CaO


Related Questions

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The artificial silk produced from cellulose is

A. Polyethylene

B. Nylon

C. Terylene

D. Rayon

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The oldest known organic compound is

A. urea

B. methane

C. acetic acid

D. benzene

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Which or the following gases is soluble in water and Is collected by the downward displacement or air?

A. Carbon dioxide

B. Sulphur dioxide

C. Ammonia

D. Hydrogen

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Which of the following statements regarding natural radioactivity is true?

A. It is spontaneous disintegration of atoms

B. It is induced by bombardment with projectiles

C. It is transmutation of atoms with projectiles

D. It is dependent on temperature

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The commonest ore of aluminium is

A. cryolite

B. bauxite

C. malachite

D. azurite

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Which of the following types of water gives lather easily with soap?

A. Hard water

B. Heavy water

C. Soft water

D. Both (a) and (b)

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A mixture of ethyl alcohol and water can be separated by

A. evaporation

B. sublimation

C. using a separating funnel

D. fractional distillation

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A non-material kind of pollution is

A. land pollution

B. air pollution

C. noise pollution

D. water pollution

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The pH or pure water is nearly 7.0 It will increase on the addition or

A. hydrochloric acid

B. ammonia

C. cane sugar

D. common salt

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Boiler scales' contain

A. calcium carbonate

B. magnesium bicarbonate

C. calcium sulphate

D. magnesium sulphate

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The number of neutrons in the nucleus of an atom of mass A and atomic number Z is given by

A. A - Z

B. A + Z

C. Z

D. A

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The metal which reacts most violently with cold water is

A. calcium

B. sodium

C. magnesium

D. potassium

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A common rodenticide is (Rat Poison)

A. malathion

B. parathion

C. zinc phosphide

D. diuron

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Which of the following act a both u oxidising and reducing agent?

A. nitric acid

B. ammonia

C. nitrous acid

D. nitrogen peroxide

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Fructose is also called

A. dextrose

B. fruit sugar

C. beet sugar

D. blood sugar

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The gas evolved when ammonium nitrate is heated is

A. nitrogen

B. nitric oxide

C. nitrogen peroxide

D. nitrous oxide

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Dust particles in the air of large industrial cities are removed by

A. Sedimentation

B. Electrophoresis

C. Tyndall effect

D. Brownian movement

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Which of the following is not an antibiotic?

A. streptomycin

B. terramycin

C. aureomycin

D. codein

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Which of the following elements is not required for the healthy growth of plants?

A. Nitrogen

B. Phosphorus

C. Potassium

D. Mercury

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The science which deals with the chemistry of life processes is known as

A. electrochemistry

B. physical chemistry

C. biochemistry

D. tinctorial chemistry

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Glass articles are annealed so that

A. they may appear better

B. they can resist the action of acids and alkalies

C. they lose their brittleness

D. they can withstand temperature shocks

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Deficiency of iron causes

A. nervous disorders

B. heart diseases

C. anaemia

D. impairment of vision

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The noble gas which is present in microscopic quantities in air is

A. xenon

B. krypton

C. argon

D. helium

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When ants bite, they inject

A. glacial acetic acid

B. methanol

C. formic acid

D. stearic acid

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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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Gases have

A. a definite shape but not volume

B. a definite volume and shape

C. a definite volume but not shape

D. neither definite volume nor shape

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Tincture iodine is

A. a disinfectant

B. an analgesic

C. a hypnotic

D. a dye

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An example of thermo setting plastics is

A. bakelite

B. polythene

C. PVC

D. Teflon

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Argyrol used as eye ointment is a solution of

A. hydrogen peroxide

B. silver nitrate

C. tincture iodine

D. m-cresol

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The purest form of carbon is

A. animal charcoal

B. coal

C. wood charcoal

D. sugar charcoal