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4

Calamine is a ore of

A. tine

B. magnesium

C. zinc

D. copper

Correct Answer :

C. zinc


Related Questions

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4

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

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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4

Which one of the following is used in dry cleaning of garments?

A. asphalt

B. naphtha

C. diesel oil

D. lubricating oil

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4

Which of the following is a regenerated fibre?

A. Terylene

B. Rayon

C. Nylon

D. Silk

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4

The simplest hydrocarbon is

A. benzene

B. methane

C. ethane

D. butane

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4

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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Which one of the following metals is used to extract another metal?

A. Lead

B. Tin

C. Zinc

D. Aluminium

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4

A mixture of naphthalene and sand is separated by

A. evaporation

B. using a magnet

C. sublimation

D. sedimentation

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4

Heated saw dust catches fire when a drop of concentrated nitric acid is added to it. This is due to

A. dehydration

B. oxidation

C. reduction

D. dehydrogenation

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4

Refined petroleum is decolourised by

A. manganese dioxide

B. bauxite

C. animal charcoal

D. quicklime

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4

Which among the following is a metalloid?

A. Tin

B. Silver

C. Iodine

D. Arsenic

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4

A compound used both as a fungicide and as a disinfectant is

A. chlorine

B. carbon monoxide

C. sulphur dioxide

D. o-cresol

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4

Oxalic acid is used in the manufacture of

A. tincture iodine

B. paints

C. ink

D. aerated water

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4

An example of stimulant fertilizer is

A. gypsum

B. urea

C. potassium nitrate

D. ammonium phosphate

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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 name rubber was given by

A. Lavoisier

B. Priestley

C. Dalton

D. Avogadro

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The main element used in the vulcani-sation of rubber is

A. nickel

B. copper

C. sulphur

D. graphite

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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

The sugar which is used in silvering mirrors is

A. sucrose

B. maltose

C. glucose

D. fructose

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4

CAN is used as (Calcium Ammonium Nitrate)

A. an explosive

B. a fertilizer

C. a dye

D. a bleaching agent

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4

The pure at form of iron is

A. wrought iron

B. steel

C. pig iron

D. nickel steel

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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

Which of the following act a both u oxidising and reducing agent?

A. nitric acid

B. ammonia

C. nitrous acid

D. nitrogen peroxide

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4

Which of the following is not a metal?

A. Lithium

B. Helium

C. Sodium

D. Cobalt

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4

The main constituent of gobar gas is

A. methane

B. nitrogen

C. carbondioxide

D. ethylene

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4

The neutron was discovered by

A. Chadwick

B. Madam Curie

C. Becquerel

D. Aston

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4

The iron salt used in blue prints is

A. ferric sulphate

B. ferric oxalate

C. ferric nitrate

D. ferric chloride

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4

Burglar proof safes are made of

A. Tungsten steel

B. Manganese steel

C. Chromium steel

D. Nickel steel

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4

Iodine in alcohol is known as

A. quick lime

B. tincture iodine

C. rectified spirit

D. None of these

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4

The artificial silk produced from cellulose is

A. Polyethylene

B. Nylon

C. Terylene

D. Rayon