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Current Affairs January 2024

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Solid carbon dioxide (Dry ice) is also known as

A. Thiokol

B. Drikold

C. Perhydrol

D. Mannitol

Correct Answer :

B. Drikold


Related Questions

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An element which is preserved under water is

A. Sodium

B. red phosphorus

C. white phosphorus

D. sulphur

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4

Gasoline is obtained from crude petroleum by

A. fractional distillation

B. fractional crystallisation

C. sublimation

D. evaporation

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4

The form of carbon used in decolourising sugar solution is

A. wood charcoal

B. animal charcoal

C. coconut charcoal

D. lamp black

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4

Suspended impurities in water are effectively removed by

A. adding milk of lime

B. filtering through sand

C. adding filter alum

D. chlorination

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4

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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4

LSD is

A. an anaesthetic

B. a psychedelic drug

C. an antipyretic

D. an antibiotic

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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

Solder is an alloy of

A. tin and copper

B. tin and lead

C. tin and zinc

D. tin, copper and zinc

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4

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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4

A common rodenticide is (Rat Poison)

A. malathion

B. parathion

C. zinc phosphide

D. diuron

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4

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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4

White vitriol is

A. ZnSO4 . 7H2O

B. FeSO4 . 7H2O

C. MgSO4 . 7H2O

D. CaSO4 . 2H2O

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4

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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Which among the following is a local anaesthetic?

A. Chloroform

B. Morphine

C. Streptomycin

D. Cocaine

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4

The carbon cycle ensures that

A. the percentage of carbon dioxide in air is kept almost constant

B. air always contains a constant proportion of oxygen

C. sufficient amounts of carbohydrates are produced

D. the process of photosynthesis proceeds smoothly

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The scientist who synthesised the first organic compound (urea) in the laboratory was

A. Wohler

B. Dalton

C. Lavoisier

D. Fischer

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4

In the nitrogen cycle, denitrifying bacteria

A. oxidise ammonia to nitrates

B. convert nitrogen into ammonia

C. oxidise ammonia to free nitrogen

D. oxidise ammonia to oxides of nitrogen

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4

Which of the following is not an alloy of copper?

A. Bronze

B. Brass

C. Solder

D. Gun metal

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4

Colour blindness is

A. a congenital disease

B. a communicable disease

C. an acquired disease

D. a contagious disease

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Which of the following is a communicable disease caused by viruses?

A. Cholera

B. Dysentery

C. Diabetes

D. Measles

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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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The non-metal which has a shining appearance is

A. sulphur

B. phosphorus

C. iodine

D. bromine

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The compounds produced by plants in the process of photosynthesis are

A. carbohydrates

B. proteins

C. salts

D. fats

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A form of carbon which is a good lubricant is

A. diamond

B. coke

C. graphite

D. charcoal

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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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4

Lead pencils contain

A. white lead

B. graphite

C. red lead

D. coke

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Soda-water contains

A. sodium bicarbonate

B. sodium carbonate

C. carbonic acid

D. sodium hydroxide

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Alum is used

A. as an analgesic

B. in the purification of water

C. as a fertilizer

D. as a disinfectant

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4

Harmful bacteria in drinking water cannot be destroyed by

A. chlorination

B. boiling

C. adding caustic soda

D. ozonisation

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4

The raw materials required for the manufacture of glass are

A. silica, sodium nitrate and soda ash

B. silica, limestone and sodium nitrate

C. silica, sodium oxide and limestone

D. silica, soda ash and limestone