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4

The Carbon dioxide is absorbed by

A. Palladium

B. NaCI

C. KOH

D. Dilute H2SO4

Correct Answer :

C. KOH


Related Questions

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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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4

Which is the 'odd man' in the following?

A. brass

B. common salt

C. cane sugar

D. water

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Which one of the following is not radioactive?

A. Astatine

B. Francium

C. Tritium

D. Zirconium

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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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Glass is a ______ mixture of metallic ______.

A. homogeneous, sulphates

B. heterogeneous, nitrates

C. heterogeneous, carbonates

D. homogeneous, silicates

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An example of stimulant fertilizer is

A. gypsum

B. urea

C. potassium nitrate

D. ammonium phosphate

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The rate of setting of cement is slowed down by the addition of

A. quicklime

B. gypsum

C. soda lime

D. bleaching powder

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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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4

A mixture of carbon monoxide and hydrogen is

A. coal gas

B. producer gas

C. water gas

D. gobar gas

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4

The scientist associated with the discovery of the nucleus was

A. Rutherford

B. Moseley

C. Niels Bohr

D. J.J. Thomson

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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

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

Which of the following represents a physical change?

A. sublimation

B. oxidation

C. reduction

D. decomposition

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Which of the following is not a physical change?

A. Distillation of water

B. Action of heat on potassium chlorate

C. Powdering of glass

D. Burning of an electric lamp

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4

The formula for cane sugar is

A. C6H12O6

B. C2H5OH

C. C12H22O11

D. C7H8O

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4

Rusting is

A. an oxidation process

B. a reduction process

C. a physical change

D. an electro-chemical process

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4

Oil of winter green contains

A. acetone

B. ether

C. acetic acid

D. methyl salicylate

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4

Bordeaux mixture contains

A. copper sulphate and water

B. copper sulphate, lime and water

C. thio-urea and lime

D. copper sulphate and thio-urea

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4

During fermentation, the by-product is

A. ethyl alcohol

B. methyl alcohol

C. carbon monoxide

D. carbon dioxide

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4

White lead is

A. a basic salt

B. an acid salt

C. a double salt

D. a normal salt

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4

Chloroform used as anaesthetic should be preserved In the dark in tightly stoppered bottles because otherwise

A. it becomes coloured

B. it gets evaporated in air

C. it gets oxidised to phosgene

D. it gets decomposed to chloropicrin

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4

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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4

Which or the following electrolysis?

A. Aluminium

B. Copper

C. Zinc

D. Iron

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4

Ethyl alcohol is

A. a deliquescent substance

B. an efflorescent substance

C. a hygroscopic substance

D. a dehydrating substance

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4

Which one of the following is used for dry cleaning?

A. Kerosene oil

B. Diesel oil

C. Lubricating oil

D. Petroleum ether

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4

Which one of the following elements is alloyed with iron to produce steel which can resist high temperatures and also have high hardness and abrasion resistance?

A. Aluminium

B. Chromium

C. Nickel

D. Tungsten

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4

Compounds of nitrogen with metals are called

A. nitrates

B. nitrites

C. hyponitrates

D. nitrides

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4

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

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

Radium was isolated from

A. galena

B. dolomite

C. sylvine

D. pitchblende