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Current Affairs January 2024

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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

Correct Answer :

D. Mercury


Related Questions

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Rusting is a special case of corrosion applied to

A. nickel

B. tin

C. iron

D. chromium

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Leakage in Liquefied Petroleum Gas (LPG) cylinders is easily detected by adding

A. mercaptans

B. propylene

C. carbon disulphide

D. phosgene

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The modern system of symbols was evolved by

A. Dalton

B. Cavendish

C. Avogadro

D. Berzelius

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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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The value of Avogadro Number is

A. 6.023 x 1022

B. 1 x 10-14

C. cl 6.056 x 10-6

D. 6.023 x 1023

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During fermentation, the by-product is

A. ethyl alcohol

B. methyl alcohol

C. carbon monoxide

D. carbon dioxide

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The earliest name given to nitrogen was

A. dephlogisticated air

B. azote

C. inflammable air

D. marine acid air

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Tincture iodine is

A. a disinfectant

B. an analgesic

C. a hypnotic

D. a dye

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Galvanising is coating Iron with

A. nickel

B. zinc

C. chromium

D. copper

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The addition of a neutron to the nucleus of an atom

A. increases the atomic mass of the atom

B. decreases the atomic mass of the atom

C. increases the charge on the nucleus

D. decreases the charge on the nucleus

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Soda-water contains

A. sodium bicarbonate

B. sodium carbonate

C. carbonic acid

D. sodium hydroxide

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Which among the following gases present in the air discolours brass nameplates?

A. Hydrogen Sulphide

B. Nitrogen

C. Carbon-di-oxide

D. Oxygen

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Reduction involves

A. loss of electrons

B. gain of electrons

C. gain of oxygen

D. removal of hydrogen

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Diamonds are weighed in

A. grams

B. pounds

C. carats

D. tons

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Vulcanisation was discovered by

A. Goodyear

B. Wohler

C. Baeyer

D. Perkin

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Which of the following is an essential constituent of acids?

A. Oxygen

B. Nitrogen

C. Hydrogen

D. Chlorine

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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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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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Cupellation is used in the purification of

A. Lead

B. Tin

C. Silver

D. Gold

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Cinnabar is an ore of

A. lead

B. zinc

C. mercury

D. chromium

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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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Radium was isolated from

A. galena

B. dolomite

C. sylvine

D. pitchblende

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Cholesterol is

A. a carbohydrate

B. a protein

C. a lipid

D. a hormone

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

A. Carbon dioxide

B. Ammonia

C. Chlorine

D. Hydrogen sulphide

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Oil of winter green contains

A. acetone

B. ether

C. acetic acid

D. methyl salicylate

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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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Stainless steel contains steel and

A. manganese

B. vanadium

C. nickel

D. chromium

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Mild steel contains

A. iron with very low percentage of carbon

B. iron with high percentage of carbon

C. iron and chromium

D. iron and manganese

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The percentage of silver in German silver is

A. ten

B. twenty

C. zero

D. fifty