Chemistry Questions & Answers (Compiled from UPSC, SSC ,PSC ,IBPS previous question papers)

The aqueous solution of which among the following acids is called Vinegar?
Hydrochloric acid
Acetic acid
Citric acid
Oxalic acid

Which among the following is the correct decreasing of bioelements in Human Body?
carbon, oxygen, hydrogen, nitrogen, calcium, and phosphorus
oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus
oxygen, carbon, nitrogen, hydrogen, calcium, and phosphorus
oxygen, hydrogen, Carbon, nitrogen, calcium, and phosphorus

Which among the following happens in an oxidation reaction ?
Protons are lost
Protons are gained
Electrons are lost
Electrons are gained

Identify the thermosetting plastic from the given options:
Casseine
Polyvincychloride
Bakelite
Polythene

White Phosphorous is represented by which among the following symbols?
P4
P3
P2
P1

Which among the following is called Laughing Gas popularly?
Nitric oxide
Nitrous oxide
Nitrogen penta oxide
Nitrogen

Identify the non-metallic mineral from the given options:
Manganese
Magnesium
Silica
Bauxite

The aqueous solution of which acids is called Vinegar ?
Acetic acid
Hydrochloric acid
Citric acid
Oxalic acid

Which have maximum number of isotopes ?
Bromine
Aluminium
Polonium
Carbon

What is used to avoid melting of ice ?
Gelatine
Butane
Methane
Any acid

What is metallurgy ?
process of extracting metal in pure form from its ore.
process of creating alloys of metals.
process of making metals live long.
None of above.

Acids taste
Sour
Sweet
May be both
None of both

Acid rain is due to air pollution by ?
Carbon dioxide
Carbon monoxide
Methane
Nitrous oxide and Sulphur dioxide

The major component used in preparation of different types of glasses is :
Sodium borate
Sodium silicate
Silica
Calcium silicate

How many different oxides are formed by nitrogen ?
two
three
four
five

The single acid which dissolves gold is ?
Aqua regia
Hydrochloric acid
Nitric acid
Selenic acid

Which gas is filled in refrigerators ?
Chlorofluorocarbon
Acetylene
Methane
Butane

Contact lenses are made from ?
Polyvinyl chloride
Teflon
Polystyrene
Lucite

Brass is an alloy of ?
Copper and Tin
Copper and Zinc
Copper and Aluminium
Iron and Copper

What is extracted from Bauxite ?
Mica
Aluminium
Copper
Tin

Why is phosphorus kept under water ?
to make it wet
to make it durable
water forms a protective coating on it
to save it from catching fire when exposed to dry air

What is the chemical name of table salt ?
Sodium nitrate
Ammonium chloride
Sodium chloride
Calcium chloride

Which of the following elements behave chemically both as a metal and a non metal?
Boron
Carbon
Argon
Mercury

Which of the following gases is the most toxic?
Carbon dioxide
Sulphur dioxide
Carbon monoxide
Acetic acid

The substance that contains the maximum amount of nitrogen is ?
Ammonium Sulphate
Urea
Ammonium Nitrate
Ammonium Chloride

The cyclotron is used to
accelerating particles
separating elements
purifying metals
making alloys

The ejection of electrons when a metal surface is irradiated is known as
Black body radiation
Photoelectric effect
Zeeman effect
Atomic spectrum

Sugars are converted in the liver into
Glycogen
Vitamin
Monosaccharide
None of above

The acid generally stored in batteries is
Nitric Acid
Hydrochloric Acid
Sulphuric Acid
Acetic Acid

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