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Current Affairs January 2024

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4

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

A. mercaptans

B. propylene

C. carbon disulphide

D. phosgene

Correct Answer :

A. mercaptans


Related Questions

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The number of neutrons in the nucleus of an atom of mass A and atomic number Z is given by

A. A - Z

B. A + Z

C. Z

D. A

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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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Heavy water was discovered by

A. TW Richards

B. FW Aston

C. Stas

D. Urey

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Which or the following electrolysis?

A. Aluminium

B. Copper

C. Zinc

D. Iron

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The fertilizer which has the largest percentage of nitrogen is

A. urea

B. ammonium nitrate

C. ammonium sulphate

D. calcium cyanamide

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Setting of cement is due to

A. hydration

B. dehydration

C. dialysis

D. osmosis

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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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4

Boiler scales' contain

A. calcium carbonate

B. magnesium bicarbonate

C. calcium sulphate

D. magnesium sulphate

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Which of the following is not an alloy of copper?

A. Bronze

B. Brass

C. Solder

D. Gun metal

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4

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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4

Mortar contains cement and sand in the ratio of

A. 1 : 1

B. 1 : 2

C. 2 : 3

D. 1 : 3

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4

One of the ingredients of the paste on the side of a match box is

A. phosphorus pentaoxide

B. phosphorus trichloride

C. phosphorus trisulphide

D. phosphorus trioxide

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4

In surgical operation, the anaesthetic commonly used nowadays is

A. iodoform

B. chloroform

C. nitrous oxide-ether mixture

D. chloroform-nitrous oxide mixture

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4

Dust particles in the air of large industrial cities are removed by

A. Sedimentation

B. Electrophoresis

C. Tyndall effect

D. Brownian movement

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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

Vinegar is an aqueous solution of

A. oxalic acid

B. citric acid

C. acetic acid

D. hydrochloric acid

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The first organic compound prepared in the laboratory was

A. acetic acid

B. chloroform

C. urea

D. methane

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On chemical analysis, a bottle cork is found to contain primarily

A. proteins

B. carbohydrates

C. tannins

D. lipids

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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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LSD is

A. an anaesthetic

B. a psychedelic drug

C. an antipyretic

D. an antibiotic

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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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The pure at form of iron is

A. wrought iron

B. steel

C. pig iron

D. nickel steel

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Galvanised iron sheets are protected from rusting due to the presence of a layer of

A. lead

B. chromium

C. zinc

D. tin

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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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4

Stainless steel contains steel and

A. manganese

B. vanadium

C. nickel

D. chromium

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Quick lime has the formula

A. CaO

B. Ca(OH)2

C. NaOH

D. Na2CO3

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A substance used both as an explosive and as a germicide is

A. phenol

B. TNT

C. picric acid

D. iodoform

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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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Which of the following is not a supporter of combustion?

A. Oxygen

B. Air

C. Hydrogen

D. Chlorine

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Calomel is

A. lead chloride

B. mercurous chloride

C. mercuric chloride

D. calcium sulphate