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The iron salt used in blue prints is

A. ferric sulphate

B. ferric oxalate

C. ferric nitrate

D. ferric chloride

Correct Answer :

B. ferric oxalate


Related Questions

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Which of the following is used as an illuminant?

A. Gasoline

B. Benzoline

C. Kerosene

D. Petroleum ether

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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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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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Brass contains

A. copper and tin

B. aluminium and magnesium

C. copper and zinc

D. copper, tin and zinc

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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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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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Which of the following can absorb gases quickly?

A. Activated charcoal

B. Anthracite coal

C. Diamond

D. Graphite

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The form of carbon used in decolourising sugar solution is

A. wood charcoal

B. animal charcoal

C. coconut charcoal

D. lamp black

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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

The purest form of carbon is

A. animal charcoal

B. coal

C. wood charcoal

D. sugar charcoal

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4

Which of the following is not an antibiotic?

A. streptomycin

B. terramycin

C. aureomycin

D. codein

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Temporary hardness is due to the presence of

A. calcium carbonate

B. calcium bicarbonate

C. magnesium sulphate

D. calcium sulphate

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The function of nitrogen in air is

A. to make air a moderate supporter of combustion

B. to maintain the density of air constant

C. to prevent the hydrogen in air from exploding

D. to reduce the poisonous nature of ozone in air

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Marsh gas is

A. ethane

B. ethylene

C. acetylene

D. methane

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The gas which has a faint sweet odour is

A. nitrogen

B. nitrous oxide

C. nitric oxide

D. nitrogen peroxide

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Which of the following is used as a food preservative?

A. phenol

B. washing soda

C. absolute alcohol

D. vinegar

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A metal which occurs 'free' in nature is

A. gold

B. zinc

C. tin

D. molybdenum

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Which of the following is not a chemical change?

A. Rusting of iron

B. Burning of magnesium

C. Sublimation of iodine

D. Electrolysis of water

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4

Coke is a substance obtained

A. from coal mines

B. when wood is burnt in excess of air

C. by heating coal out of contact with air

D. by heating wood out to contact with air

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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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Which of the following cannot be used as fuel?

A. Gasoline

B. Kerosene

C. Sulphuric acid

D. Alcohol

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Plaster of Paris

A. contracts while setting

B. expands while setting

C. is highly volatile

D. does not suffer any changes in volume while setting

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A hormone which contains iodine is

A. adrenalin

B. glucagon

C. epinephrin

D. thyroxin

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Metals are usually heavy. A light metal is

A. manganese

B. copper

C. potassium

D. plumbum

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Marble is

A. calcium carbonate

B. sodium carbonate

C. magnesium sulphate

D. ferric chloride

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Isotopes differ in the number of

A. Protons

B. Neutrons

C. Electrons

D. Protons and electrons

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Burglar proof safes are made of

A. Tungsten steel

B. Manganese steel

C. Chromium steel

D. Nickel steel

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4

A non-material kind of pollution is

A. land pollution

B. air pollution

C. noise pollution

D. water pollution

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An example of stimulant fertilizer is

A. gypsum

B. urea

C. potassium nitrate

D. ammonium phosphate

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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