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Current Affairs January 2024

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Reduction involves

A. loss of electrons

B. gain of electrons

C. gain of oxygen

D. removal of hydrogen

Correct Answer :

B. gain of electrons


Related Questions

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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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A metal which is extracted by thermal reduction is

A. nickel

B. aluminium

C. mercury

D. calcium

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The presence of dust particles in air serves

A. as a nucleus to condense water vapour resulting in rain

B. to maintain the average density of air

C. to minimise the inflammatory nature of oxygen

D. to protect the inhabitants of the earth from the effects of ultra violet rays.

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A non-metal which is a good conductor or heat and electricity is

A. iodine

B. sulphur

C. graphite

D. phosphorus

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Which is the 'odd man' in the following?

A. brass

B. common salt

C. cane sugar

D. water

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Nitrous oxide used as anaesthetic is usually mixed with

A. ethyl alcohol

B. chloroform

C. oxygen

D. methyl alcohol

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The depletion of the ozone layer in the upper atmosphere is due to -extensive use of

A. dichloro-phenoxy-acetic acid

B. superphosphate of lime

C. chlorofluorocarbons (CFC)

D. dichloro-diphenyl-trichloro-ethane

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Cupellation is used in the purification of

A. Lead

B. Tin

C. Silver

D. Gold

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The raw materials used in the manufacture of cement are

A. brimstone and silica

B. limestone and clay

C. brimstone and clay

D. brimstone and limestone

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Which of the following is used as an illuminant?

A. Gasoline

B. Benzoline

C. Kerosene

D. Petroleum ether

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Which among the following is a local anaesthetic?

A. Chloroform

B. Morphine

C. Streptomycin

D. Cocaine

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Beri-beri is caused by deficiency of Vitamin

A. A

B. C

C. B12

D. B1

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If people sleep in closed rooms where charcoal fire is burning, they die due to

A. carbon monoxide

B. carbon dioxide

C. methane

D. phosgene

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A drug that is usually administered for malaria is

A. sulphanilamide

B. quinine

C. methicillin

D. novocaine

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BHC is a

A. Rodenticide

B. Herbicide

C. Pesticide

D. Fungicide

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Which of the following is not a metal?

A. Lithium

B. Helium

C. Sodium

D. Cobalt

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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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Solid carbon dioxide is used

A. as a drying agent

B. as a refrigerant

C. as an antiseptic

D. as a bleaching agent

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In the process of purification of water for town supply, the substance used to remove bad smell and colour from water is

A. charcoal

B. bleaching powder

C. chlorine

D. carbolic acid

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The process that takes place in the atom bomb is

A. nuclear' fusion

B. radioactive disintegration

C. nuclear fission

D. chemical decomposition

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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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The poisonous nature of carbon monoxide is due to

A. cutting off supply of oxygen

B. it™s being converted into carbon dioxide

C. its combination with haemoglobin of blood

D. its blocking of vocal chords

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

A. sucrose

B. glucose

C. fructose

D. mannose

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Which of the following la a very good supporter of combustion?

A. Carbon monoxide

B. Oxygen

C. Nitrogen

D. Hydrogen

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Triple Antigen treatment for children is to ward off

A. whooping cough

B. tetanus

C. diphtheria

D. All the three

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Tincture iodine is a solution of

A. iodine in potassium iodide

B. iodine in alcohol

C. iodine in water

D. iodine in carbon disulphide

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Hard water does not lather well with soap because

A. it contains carbonates of calcium and magnesium

B. it contains sodium chloride

C. it is highly coloured

D. it contains suspended impurities

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Deficiency of iron causes

A. nervous disorders

B. heart diseases

C. anaemia

D. impairment of vision

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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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Annealing of glass is done in

A. a cupel

B. a long narrow chamber

C. an open furnace

D. a closed furnace