Online GK Test

GK Test
 

Question: Which of the following is a non metal that remains liquid at room temperature?

1

Phosphorous

2

Bromine

3

Chlorine

4

Helium

View Answer

Correct Answer: 2

Question: Quartz crystals normally used in quartz clocks etc. is chemically

1

silicon dioxide

2

germanium oxide

3

a mixture of germanium oxide and silicon dioxide

4

sodium silicate

View Answer

Correct Answer: 1

Question: Which of the following metals forms an amalgam with other metals?

1

Tin

2

Mercury

3

Lead

4

Zinc

View Answer

Correct Answer: 2

Question: Which of the following is used in pencils?

1

Graphite

2

Silicon

3

Charcoal

4

Phosphorous

View Answer

Correct Answer: 1

Question: Permanent hardness of water can be removed by adding

1

chlorine

2

washing soda

3

potassium permanganate

4

bleaching powder

View Answer

Correct Answer: 2

Question: Marsh gas is

1

nitrogen

2

ethane

3

methane

4

methane

View Answer

Correct Answer: 3

Question: LPG consists of mainly

1

methane, ethane and hexane

2

ethane, hexane and nonane

3

methane, hexane and nonane

4

methane, butane and propane

View Answer

Correct Answer: 4

Question: Water is a good solvent of ionic salts because

1

it has a high specific heat

2

it has no colour

3

it has a high dipole moment

4

it has a high boiling point

View Answer

Correct Answer: 3

Question: Amalgams are

1

highly coloured alloys

2

alloys which contain mercury as one of the contents

3

alloys which have great resistance to abrasion

4

alloys which contain carbon

View Answer

Correct Answer: 2

Question: Which of the following is the lightest metal?

1

Mercury

2

Lithium

3

Lead

4

Silver

View Answer

Correct Answer: 2

Question: Which of the gas is not known as green house gas?

1

Methane

2

Nitrous oxide

3

Carbon dioxide

4

Hydrogen

View Answer

Correct Answer: 4

Question: Bromine is a

1

black solid

2

red liquid

3

colourless gas

4

highly inflammable gas

View Answer

Correct Answer: 2

Question: The variety of coal in which the deposit contains recognisable traces of the original plant mate

1

bitumen

2

anthracite

3

lignite

4

peat

View Answer

Correct Answer: 4

Question: Washing soda is the common name for

1

Sodium carbonate

2

Calcium bicarbonate

3

Sodium bicarbonate

4

Calcium carbonate

View Answer

Correct Answer: 1

Question: Which of the following is used as a lubricant?

1

Graphite

2

Silica

3

Iron Oxide

4

Diamond

View Answer

Correct Answer: 1

Question: The property of a substance to absorb moisture from the air on exposure is called

1

osmosis

2

deliquescence

3

efflorescence

4

desiccation

View Answer

Correct Answer: 2

Question: In which of the following activities silicon carbide is used?

1

Making cement and glass

2

Disinfecting water of ponds

3

cutting very hard substances

4

Making casts for statues

View Answer

Correct Answer: 3

Question: The average salinity of sea water is

1

3%

2

3.5%

3

2.5%

4

2%

View Answer

Correct Answer: 2

Question: Chemical formula for water is

1

NaA1O2

2

H2O

3

Al2O3

4

CaSiO3

View Answer

Correct Answer: 2

Question: Brass gets discoloured in air because of the presence of which of the following gases in air?

1

Oxygen

2

Hydrogen sulphide

3

Carbon dioxide

4

Nitrogen

View Answer

Correct Answer: 2

Question: In which of the following activities silicon carbide is used?

1

Making cement and glass

2

Disinfecting water of ponds

3

cutting very hard substances

4

Making casts for statues

View Answer

Correct Answer: 3

Question: When an iron nail gets rusted, iron oxide is formed

1

without any change in the weight of the nail

2

with decrease in the weight of the nail

3

with increase in the weight of the nail

4

without any change in colour or weight of the nail

View Answer

Correct Answer: 3

Question: Among the various allotropes of carbon

1

coke is the hardest, graphite is the softest

2

diamond is the hardest, coke is the softest

3

diamond is the hardest, graphite is the softest

4

diamond is the hardest, lamp black is the softest

View Answer

Correct Answer: 3

Question: Heavy water is

1

deuterium oxide

2

PH7

3

rain water

4

tritium oxide

View Answer

Correct Answer: 1

Question: Diamond is an allotropic form of

1

germanium

2

carbon

3

silicon

4

sulphur

View Answer

Correct Answer: 2

Question: In fireworks, the green flame is produced because of

1

sodium

2

barium

3

mercury

4

potassium

View Answer

Correct Answer: 2

Question: Air is a/an

1

compound

2

element

3

electrolyte

4

mixture

View Answer

Correct Answer: 4

Question: Which of the following is not an isotope of hydrogen?

1

Tritium

2

Deuterium

3

Protium

4

Yttrium

View Answer

Correct Answer: 4

Question: The main constituents of pearls are

1

calcium oxide and ammonium chloride

2

calcium carbonate and magnesium carbonate

3

aragonite and conchiolin

4

ammonium sulphate and sodium carbonate

View Answer

Correct Answer: 2

Question: Potassium nitrate is used in

1

medicine

2

fertiliser

3

salt

4

glass

View Answer

Correct Answer: 2

Question: What is laughing gas?

1

Nitrous Oxide

2

Carbon monoxide

3

Sulphur dioxide

4

Hydrogen peroxide

View Answer

Correct Answer: 1

Question: Actinides are the elements with atomic numbers from

1

97 to 104

2

101 to 115

3

89 to 103

4

36 from 43

View Answer

Correct Answer: 3

Question: The two elements that are frequently used for making transistors are

1

boron and aluminium

2

silicon and germanium

3

iridium and tungsten

4

niobium and columbium

View Answer

Correct Answer: 2

Question: The filament of an electric bulb is made of

1

tungsten

2

nichrome

3

graphite

4

iron

View Answer

Correct Answer: 1

Question: Potassium Permanganate is used for purifying drinking water, because

1

it is a sterilising agent

2

it dissolves the impurities of water

3

it is a reducing agent

4

it is an oxidising agent

View Answer

Correct Answer: 4

Question: Which of the following was to be discovered first in the chromospheres of the sun?

1

Krypton

2

Xenon

3

Neon

4

Helium

View Answer

Correct Answer: 4

Question: Which of the following are the ingredients of gun metal?

1

Iron, Zinc, Titanium

2

Iron, tin

3

Iron, Brass, Tin

4

Copper, Tin

View Answer

Correct Answer: 4

Question: From which mineral is radium obtained?

1

Rutile

2

Haematite

3

Limestone

4

Pitchblende

View Answer

Correct Answer: 4

Question: Which of the following metals remain in liquid for under normal conditions?

1

Radium

2

Zinc

3

Uranium

4

Mercury

View Answer

Correct Answer: 4

Question: Which of the following is an element?

1

Ruby

2

Sapphire

3

Emerald

4

Diamond

View Answer

Correct Answer: 4

Question: Which of the following is in liquid form at room temperature?

1

Lithium

2

Sodium

3

Francium

4

Cerium

View Answer

Correct Answer: 3

Question: Sodium metal is kept under

1

petrol

2

alcohol

3

water

4

kerosene

View Answer

Correct Answer: 4

Question: The chemical (ethyl mercaptan) added to the otherwise odourless LPG cooking gas for imparting

1

bromine

2

fluorine

3

chlorine

4

sulphur

View Answer

Correct Answer: 4

Question: The element common to all acids is

1

hydrogen

2

carbon

3

sulphur

4

oxygen

View Answer

Correct Answer: 1

Question: Non stick cooking utensils are coated with

1

Teflon

2

PVC

3

black paint

4

polystyrene

View Answer

Correct Answer: 1

Question: Monazite is an ore of

1

titanium

2

zirconium

3

iron

4

thorium

View Answer

Correct Answer: 4

Question: Carbon, diamond and graphite are together called

1

allotropes

2

isomers

3

isomorphs

4

isotopes

View Answer

Correct Answer: 1

Question: Permanent hardness of water may be removed by the addition of

1

sodium carbonate

2

alum

3

potassium permanganate

4

lime

View Answer

Correct Answer: 1

Question: Soda water contains

1

carbonic acid

2

sulphuric acid

3

carbon dioxide

4

nitrous acid

View Answer

Correct Answer: 3

Question: The most important ore of aluminium is

1

galena

2

calamine

3

calcite

4

bauxite

View Answer

Correct Answer: 4

Question: Most soluble in water is

1

camphor

2

sulphur

3

common salt

4

sugar

View Answer

Correct Answer: 4

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