Chemistry One-Liners for various competitive examinations

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 Here are some important Chemistry one-liners for students competing for various exams

 Watch some of the important Chemistry Bits below.

1-A mixture of sand and naphthalene can be separated by

a-Sublimation

b- Chromatography

c-Fractional distillation

d-Sedimentation

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2-‘Yellow cake’ an item of smuggling across the border is

a-A crude form of cocaine

b-Unrefined gold

c- A crude form of heroin

d-Uranium oxide

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3-This is a non-metal that remains liquid at room temperature.

a-Chlorine

b-Helium

c-Phosphorous

d-Bromine

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4-‘Misch metal‘ is widely used in the manufacture of

a-Cigarette lighters

b-Material of car brake

c-Emergency lights

d-Smoke detectors

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5-The M.K.S. system was first introduced by

a-Newton

b-Giorgi

c- Einstein

d- Archimedes

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6- Hydrogen bomb is based on the principle of

a-Artificial radioactivity

b-Natural radioactivity

c-Nuclear fusion

d-Nuclear fission

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7-The purest form of iron is

a- Pig iron

b-Wrought iron

c-Nickel steel

d-Steel

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8-Cobalt – 60 is commonly used in radiation therapy because it emits

a- Gamma rays

b-X – rays

c-Beta rays

d-Alpha – rays

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9-The Scientist who stated that matter can be converted into energy is

a-Boyle

b-Avogadro

c-Lavoisier

d-Einstein

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10- In the nuclear reactor, the Chain reaction is controlled by introducing

a-Cadmium rod

b-Graphite rod

c-Iron rod

d-Platinum rod

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11-Brass gets discolored in the air because of the presence of

a-Carbon dioxide

b-Hydrogen sulfide

c-Oxygen

d-Nitrogen

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12-Temporary hardness is due to the presence of

a- Magnesium sulfate

b-Calcium carbonate

c-Calcium sulfate

d-Calcium bicarbonate

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13- An element which is preserved under-water is

a- White phosphorus

b- Sulfur

c- Sodium

d- Red phosphorus

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

a-Dehydrogenation

b-Dehydration

c-Reduction

d-Oxidation

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15- The bleeding of a wound is stopped by the application of ferric chloride because

a-Blood is coagulated and the blood vessels are sealed

b-Blood starts flowing in the opposite direction

c-Blood reacts and a solid is formed which seals the blood vessels

d-Ferric chloride seals the blood vessels

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Ans- 1-a; 2-d; 3-d; 4-a; 5-b; 6-c; 7-b; 8-a; 9-d; 10-a; 11-b; 12-d; 13-a; 14-d; 15-a

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