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Current Affairs January 2024

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Rain water collected after a shower la very pure because

A. the initial showers wash the atmosphere free from most of the impurities

B. it contains desirable salts like sodium chloride and ammonium nitrate

C. it dissolves the gases in the atmosphere like ozone which are good for health in small quantities

D. it is supposed to be 'heaven sent'

Correct Answer :

A. the initial showers wash the atmosphere free from most of the impurities


Related Questions

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According to the modern Periodic Law, the properties of elements are periodic functions of their

A. valency

B. atomic mass

C. number of neutrons

D. atomic number

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The best specimen for drinking purposes is

A. rain water

B. river water

C. conductivity water

D. deep well water

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The gas which has a faint sweet odour is

A. nitrogen

B. nitrous oxide

C. nitric oxide

D. nitrogen peroxide

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Laughing gas is

A. nitric oxide

B. nitrogen peroxide

C. nitrogen pentoxide

D. nitrous oxide

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The soaps used in shaving cream are

A. calcium soaps

B. lead soaps

C. soft soaps

D. hard soaps

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Plastics are synthetic

A. rubbers

B. fibres

C. resins

D. sugars

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The most abundant noble gas present in air is

A. neon

B. argon

C. helium

D. krypton

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An antipyretic is a drug used

A. in the treatment of malaria

B. to relieve sleepiness

C. to induce sleep

D. to lower body temperature

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4

The modern system of symbols was evolved by

A. Dalton

B. Cavendish

C. Avogadro

D. Berzelius

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Setting of cement is due to

A. hydration

B. dehydration

C. dialysis

D. osmosis

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Which of the following cannot be used as fuel?

A. Gasoline

B. Kerosene

C. Sulphuric acid

D. Alcohol

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Which of the following is not a chemical change?

A. Rusting of iron

B. Burning of magnesium

C. Sublimation of iodine

D. Electrolysis of water

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Apart from lead tetra-ethyl, the other compound used as antiknock is

A. n-heptane

B. n-octane

C. iso-heptane

D. iso-octane

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4

Marble is

A. calcium carbonate

B. sodium carbonate

C. magnesium sulphate

D. ferric chloride

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The sugar which is used in silvering mirrors is

A. sucrose

B. maltose

C. glucose

D. fructose

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The flux added in the blast furnace is

A. Limestone

B. FeO

C. SiO2

D. MgO

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Rayon la made from

A. cotton

B. wool

C. cellulose

D. silk

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White vitriol is

A. ZnSO4 . 7H2O

B. FeSO4 . 7H2O

C. MgSO4 . 7H2O

D. CaSO4 . 2H2O

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4

Vinegar is the trade name for

A. chloroform

B. acetic acid

C. phenol

D. carbon tetrachloride

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The name rubber was given by

A. Lavoisier

B. Priestley

C. Dalton

D. Avogadro

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Which or the following electrolysis?

A. Aluminium

B. Copper

C. Zinc

D. Iron

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The human body contains about

A. 50% water

B. 10% water

C. 70% water

D. 20% water

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The malarial parasite was discovered by

A. Sir Ronald Ross

B. Sir Francis Haig

C. Dr Jagadish Chandra Bose

D. Sir CV Raman

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What is 'oxygen mixture'?

A. A mixture of potassium nitrate and carbon

B. A mixture of ammonium chloride and sodium nitrate

C. A mixture of potassium chlorate and manganese dioxide

D. A mixture of ammonium nitrate and charcoal

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Refined petroleum is decolourised by

A. manganese dioxide

B. bauxite

C. animal charcoal

D. quicklime

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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

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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4

A non-material kind of pollution is

A. land pollution

B. air pollution

C. noise pollution

D. water pollution

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Ozone occurs in the upper layers of air in the atmosphere because

A. it is lighter than air

B. in the lower layers it becomes unstable

C. ultra-violet light is present only in the upper layers

D. it mixes freely with O2 in the upper layers

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Which of the following is not a metal?

A. Lithium

B. Helium

C. Sodium

D. Cobalt