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4

The first organic compound prepared in the laboratory was

A. acetic acid

B. chloroform

C. urea

D. methane

Correct Answer :

C. urea


Related Questions

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The atomic number of an element represents

A. number of neutrons in the nucleus

B. number of protons and neutrons in the nucleus

C. the valency of the element

D. number of protons in the nucleus

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A metal which exhibits allotropy is

A. cobalt

B. tin

C. manganese

D. platinum

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An acid which is used as a preservative for pickles is

A. hydrochloric acid

B. citric acid

C. tartaric acid

D. acetic acid

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Apart from lead tetra-ethyl, the other compound used as antiknock is

A. n-heptane

B. n-octane

C. iso-heptane

D. iso-octane

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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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Deficiency of iron causes

A. nervous disorders

B. heart diseases

C. anaemia

D. impairment of vision

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A metal which is extracted by thermal reduction is

A. nickel

B. aluminium

C. mercury

D. calcium

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Rusting is a special case of corrosion applied to

A. nickel

B. tin

C. iron

D. chromium

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The gas used in balloons in the place of hydrogen is

A. nitrogen

B. helium

C. neon

D. argon

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The main constituent of gobar gas is

A. methane

B. nitrogen

C. carbondioxide

D. ethylene

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Which among the following is a metalloid?

A. Tin

B. Silver

C. Iodine

D. Arsenic

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In the nitrogen cycle, denitrifying bacteria

A. oxidise ammonia to nitrates

B. convert nitrogen into ammonia

C. oxidise ammonia to free nitrogen

D. oxidise ammonia to oxides of nitrogen

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

A. graphite

B. phosphorus

C. sulphur

D. iodine

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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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Which of the following is a halogen?

A. Radon

B. Astatine

C. Cesium

D. Ruthenium

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Vinegar is the trade name for

A. chloroform

B. acetic acid

C. phenol

D. carbon tetrachloride

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Marble is

A. calcium carbonate

B. sodium carbonate

C. magnesium sulphate

D. ferric chloride

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Which of the following la a very good supporter of combustion?

A. Carbon monoxide

B. Oxygen

C. Nitrogen

D. Hydrogen

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Which of the following represents a physical change?

A. sublimation

B. oxidation

C. reduction

D. decomposition

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One method by which the components of air can be separated is

A. shaking with caustic soda solution

B. shaking with water

C. fractional distillation of liquid air

D. passing air over heated magnesium

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Calamine is a ore of

A. tine

B. magnesium

C. zinc

D. copper

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The gas evolved when ammonium nitrate is heated is

A. nitrogen

B. nitric oxide

C. nitrogen peroxide

D. nitrous oxide

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A mixture of ethyl alcohol and water can be separated by

A. evaporation

B. sublimation

C. using a separating funnel

D. fractional distillation

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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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Triple Antigen treatment for children is to ward off

A. whooping cough

B. tetanus

C. diphtheria

D. All the three

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A hormone which contains iodine is

A. adrenalin

B. glucagon

C. epinephrin

D. thyroxin

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An antipyretic is a drug used

A. in the treatment of malaria

B. to relieve sleepiness

C. to induce sleep

D. to lower body temperature

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Which of the following is not an alloy of copper?

A. Bronze

B. Brass

C. Solder

D. Gun metal