The modern system of symbols was evolved by

Question

The modern system of symbols was evolved by

A. Dalton

B. Cavendish

C. Avogadro

D. Berzelius

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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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Iron is coated with zinc to prevent rusting. The process is called

A. annealing

B. tempering

C. calcining

D. galvanising

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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

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A valuable by-product in the manufacture of soap is

A. stearic acid

B. sodium hydroxide

C. palmitic acid

D. glycerol

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The ore of iron is

A. Dolomite

B. Magnetite

C. Bauxite

D. Anglesite

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Riboflavin deficiency causes

A. tongue inflammation

B. pellagra

C. night blindness

D. anaemia

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A drug that is usually administered for malaria is

A. sulphanilamide

B. quinine

C. methicillin

D. novocaine

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Methylated spirit is a mixture of

A. methyl alcohol and acetic acid

B. methyl alcohol and ethyl alcohol

C. ethyl alcohol and pyridine

D. methyl alcohol and pyridine

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Carbogen is used in

A. CO2 poisoning

B. CO poisoning

C. phosgene poisoning

D. anesthesia

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________ is left behind after distillation of petroleum.

A. Arsenic

B. Barium

C. Benzene

D. Bitumen

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The discoverer of chloroform was

A. Liebig

B. Pasteur

C. Bunsen

D. Erlenmeyer

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LSD is

A. an anaesthetic

B. a psychedelic drug

C. an antipyretic

D. an antibiotic

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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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Lead pencils contain

A. white lead

B. graphite

C. red lead

D. coke

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Gases have

A. a definite shape but not volume

B. a definite volume and shape

C. a definite volume but not shape

D. neither definite volume nor shape

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Ozone occurs in the upper layers of air in the atmosphere because

A. it is lighter than air

B. in the lower layers it becomes unstable

C. ultra-violet light is present only in the upper layers

D. it mixes freely with O2 in the upper layers

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The chemical name of aspirin is

A. acetamide phenol

B. malonyl urea

C. aminosalicylic acid

D. acetyl salicylic acid

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Copper is purified by

A. poling

B. tempering

C. calcination

D. galvanising

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Nitrous oxide used as anaesthetic is usually mixed with

A. ethyl alcohol

B. chloroform

C. oxygen

D. methyl alcohol

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The Long Form of the Periodic Table is based on

A. atomic number

B. valency

C. atomic mass

D. atomic radius

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The science which deals with the chemistry of life processes is known as

A. electrochemistry

B. physical chemistry

C. biochemistry

D. tinctorial chemistry

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Which or the following gases is soluble in water and Is collected by the downward displacement or air?

A. Carbon dioxide

B. Sulphur dioxide

C. Ammonia

D. Hydrogen

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Which among the following gases present in the air discolours brass nameplates?

A. Hydrogen Sulphide

B. Nitrogen

C. Carbon-di-oxide

D. Oxygen

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During fermentation, the by-product is

A. ethyl alcohol

B. methyl alcohol

C. carbon monoxide

D. carbon dioxide

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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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Graphite la a good conductor of electricity because

A. it is an allotrope of carbon

B. it gives CO2 on heating

C. it contains free electrons

D. it is oxidised to graphitic acid

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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 a Bleaching agent?

A. Potassium chlorate

B. Hydrogen peroxide

C. Copper sulphate

D. Silver Nitrate

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Oil of winter green contains

A. acetone

B. ether

C. acetic acid

D. methyl salicylate

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Which one of the following gases is extremely soluble in water?

A. Carbon dioxide

B. Ammonia

C. Chlorine

D. Hydrogen sulphide

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Accepted Answer

D. Berzelius

The modern system of symbols was evolved by

Correct Answer :

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