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Current Affairs January 2024

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Which of the following represents a physical change?

A. sublimation

B. oxidation

C. reduction

D. decomposition

Correct Answer :

A. sublimation


Related Questions

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The oldest known organic compound is

A. urea

B. methane

C. acetic acid

D. benzene

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In the making of jewels, gold is usually mixed with

A. zinc

B. tin

C. copper

D. aluminium

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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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Which of the following is used as an illuminant?

A. Gasoline

B. Benzoline

C. Kerosene

D. Petroleum ether

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LSD is

A. an anaesthetic

B. a psychedelic drug

C. an antipyretic

D. an antibiotic

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Brine is a solution of

A. sodium chloride in water

B. iodine in alcohol

C. sulphur in carbon disulphide

D. Potassium iodide in water

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________ is left behind after distillation of petroleum.

A. Arsenic

B. Barium

C. Benzene

D. Bitumen

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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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The compounds produced by plants in the process of photosynthesis are

A. carbohydrates

B. proteins

C. salts

D. fats

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A common rodenticide is (Rat Poison)

A. malathion

B. parathion

C. zinc phosphide

D. diuron

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The compound of iron used in the manufacture of blue-black ink is

A. ferric chloride

B. ferric sulphate

C. ferric thiocyanate

D. ferrous sulphate

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Vinegar is the trade name for

A. chloroform

B. acetic acid

C. phenol

D. carbon tetrachloride

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The hormone which absorption is increases glucose oxidation and glucose

A. adrenalin

B. thyroxin

C. insulin

D. epinephrine

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Radium was isolated from

A. galena

B. dolomite

C. sylvine

D. pitchblende

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Which of the following is baking soda?

A. Na2CO3 . 10H2O

B. NaHCO3

C. Na2CO3 . H2O

D. NH4CI

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Which or the following electrolysis?

A. Aluminium

B. Copper

C. Zinc

D. Iron

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Lead soaps are used in

A. shaving creams

B. adhesive tapes

C. toilet powders

D. lubricants

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Riboflavin deficiency causes

A. tongue inflammation

B. pellagra

C. night blindness

D. anaemia

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Setting of cement is due to

A. hydration

B. dehydration

C. dialysis

D. osmosis

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A metal which exhibits allotropy is

A. cobalt

B. tin

C. manganese

D. platinum

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Calomel is

A. lead chloride

B. mercurous chloride

C. mercuric chloride

D. calcium sulphate

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Consider the following statements: Hard water is not suitable for
1) drinking
2) washing clothes with soap
3) use in boilers
4) irrigating crops
Which of these statements are correct?

A. 1 and 3

B. 2 and 3

C. 1, 2 and 4

D. 1, 2, 3 and 4

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Which of the following carbon compounds is used as a fire extinguisher?

A. Carbon disulphide

B. Chloroform

C. Carbon tetrachloride

D. Methylene chloride

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A non-metal which is a good conductor of electricity is

A. graphite

B. phosphorus

C. sulphur

D. iodine

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The purest form of carbon is

A. animal charcoal

B. coal

C. wood charcoal

D. sugar charcoal

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CAN is used as (Calcium Ammonium Nitrate)

A. an explosive

B. a fertilizer

C. a dye

D. a bleaching agent

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The alloy added in the preparation of steel contains

A. Fe and C

B. Mn and C

C. Fe and Mn

D. Fe, Mn and C

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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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Sulphur is readily soluble in

A. Water

B. Alcohol

C. Carbon-di-sulphide

D. Sodium chloride solution

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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