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4

The gas evolved when ammonium nitrate is heated is

A. nitrogen

B. nitric oxide

C. nitrogen peroxide

D. nitrous oxide

Correct Answer :

D. nitrous oxide


Related Questions

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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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The pH or pure water is nearly 7.0 It will increase on the addition or

A. hydrochloric acid

B. ammonia

C. cane sugar

D. common salt

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Which or the following electrolysis?

A. Aluminium

B. Copper

C. Zinc

D. Iron

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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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Gold dissolves in aqua regia due to the formation of

A. chloro auric acid

B. auric chloride

C. gold nitrate

D. aurous chloride

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Bordeaux mixture contains

A. copper sulphate and water

B. copper sulphate, lime and water

C. thio-urea and lime

D. copper sulphate and thio-urea

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Leakage in Liquefied Petroleum Gas (LPG) cylinders is easily detected by adding

A. mercaptans

B. propylene

C. carbon disulphide

D. phosgene

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Marble is

A. calcium carbonate

B. sodium carbonate

C. magnesium sulphate

D. ferric chloride

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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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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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The ore of iron is

A. Dolomite

B. Magnetite

C. Bauxite

D. Anglesite

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The best specimen for drinking purposes is

A. rain water

B. river water

C. conductivity water

D. deep well water

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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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Isotopes differ in the number of

A. Protons

B. Neutrons

C. Electrons

D. Protons and electrons

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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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The most abundant constituent in air is

A. hydrogen

B. nitrogen

C. oxygen

D. noble gases

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White vitriol is

A. ZnSO4 . 7H2O

B. FeSO4 . 7H2O

C. MgSO4 . 7H2O

D. CaSO4 . 2H2O

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4

Cupellation is used in the purification of

A. Lead

B. Tin

C. Silver

D. Gold

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Which of the following is baking soda?

A. Na2CO3 . 10H2O

B. NaHCO3

C. Na2CO3 . H2O

D. NH4CI

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Jeweller's rouge is

A. magnetic oxide of iron

B. ferric oxide

C. ferrous oxide

D. ferrous carbonate

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Flint glass contains

A. potassium and lead silicates

B. zinc and barium borosilicates

C. potassium and calcium silicates

D. sodium and calcium silicates

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4

Which one of the following is used for dry cleaning?

A. Kerosene oil

B. Diesel oil

C. Lubricating oil

D. Petroleum ether

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Alum is used

A. as an analgesic

B. in the purification of water

C. as a fertilizer

D. as a disinfectant

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In the process of purification of water for town supply, the substance used to remove bad smell and colour from water is

A. charcoal

B. bleaching powder

C. chlorine

D. carbolic acid

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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 compound which is both an antiseptic and a disinfectant is

A. phenol

B. iodoform

C. bleaching powder

D. blue vitriol

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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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Gasoline is obtained from crude petroleum by

A. fractional distillation

B. fractional crystallisation

C. sublimation

D. evaporation

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The addition of a neutron to the nucleus of an atom

A. increases the atomic mass of the atom

B. decreases the atomic mass of the atom

C. increases the charge on the nucleus

D. decreases the charge on the nucleus

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________ is left behind after distillation of petroleum.

A. Arsenic

B. Barium

C. Benzene

D. Bitumen