Laughing gas is

Question

Laughing gas is

A. nitric oxide

B. nitrogen peroxide

C. nitrogen pentoxide

D. nitrous oxide

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Vinegar is the trade name for

A. chloroform

B. acetic acid

C. phenol

D. carbon tetrachloride

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Galvanising is coating Iron with

A. nickel

B. zinc

C. chromium

D. copper

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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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Oil of winter green contains

A. acetone

B. ether

C. acetic acid

D. methyl salicylate

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White vitriol is

A. ZnSO4 . 7H2O

B. FeSO4 . 7H2O

C. MgSO4 . 7H2O

D. CaSO4 . 2H2O

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Radium was isolated from

A. galena

B. dolomite

C. sylvine

D. pitchblende

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Which one of the following is not radioactive?

A. Astatine

B. Francium

C. Tritium

D. Zirconium

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The noble gas which is present in microscopic quantities in air is

A. xenon

B. krypton

C. argon

D. helium

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Which of the following elements is not required for the healthy growth of plants?

A. Nitrogen

B. Phosphorus

C. Potassium

D. Mercury

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Rusting is

A. an oxidation process

B. a reduction process

C. a physical change

D. an electro-chemical process

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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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A burning substance which continues to burn in a jar of carbon dioxide is

A. zinc

B. red phosphorus

C. magnesium

D. sulphur

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Boiler scales' contain

A. calcium carbonate

B. magnesium bicarbonate

C. calcium sulphate

D. magnesium sulphate

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The modern system of symbols was evolved by

A. Dalton

B. Cavendish

C. Avogadro

D. Berzelius

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Quick lime has the formula

A. CaO

B. Ca(OH)2

C. NaOH

D. Na2CO3

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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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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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The soaps used in shaving cream are

A. calcium soaps

B. lead soaps

C. soft soaps

D. hard soaps

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Cinnabar is an ore of

A. lead

B. zinc

C. mercury

D. chromium

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A mixture of naphthalene and sand is separated by

A. evaporation

B. using a magnet

C. sublimation

D. sedimentation

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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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Solid carbon dioxide (Dry ice) is also known as

A. Thiokol

B. Drikold

C. Perhydrol

D. Mannitol

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Which of the following is used in fuel to propel rockets?

A. Petrol

B. Kerosene

C. Hydrazine

D. Alcohol

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Cholesterol is

A. a carbohydrate

B. a protein

C. a lipid

D. a hormone

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Colour blindness is

A. a congenital disease

B. a communicable disease

C. an acquired disease

D. a contagious disease

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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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The compound which is both an antiseptic and a disinfectant is

A. phenol

B. iodoform

C. bleaching powder

D. blue vitriol

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The oldest known organic compound is

A. urea

B. methane

C. acetic acid

D. benzene

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Real gases tend to become ideal Under

A. low pressure and high temperature

B. low pressure and low temperature

C. high pressure and low temperature

D. high pressure and high temperature

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The principle involved in dialysis, a treatment administered to patients with affected kidneys is

A. Cataphoresis

B. Osmosis

C. Dehydration

D. Diffusion

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Accepted Answer

D. nitrous oxide

Laughing gas is

Correct Answer :

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