General knowledge(GK)/General Knowledge(GK) MCQS-General Science-Elements and Metals Sample Test,Sample questions

Question:
  Air is a/an

1.compound

2.element

3.electrolyte

4.mixture

Posted Date:-2021-03-07 03:30:36


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

Posted Date:-2021-03-07 03:30:36


Question:
  Balloons are filled with

1.nitrogen

2.helium

3.oxygen

4.argon

Posted Date:-2021-03-07 03:30:36


Question:
  Bell metal is an alloy of

1. nickel and copper

2.zinc and copper

3.brass and nickel

4.tin and copper

Posted Date:-2021-03-07 03:30:36


Question:
  From which mineral is radium obtained?

1.Rutile

2.Haematite

3.Limestone

4.Pitchblende

Posted Date:-2021-03-07 03:30:36


Question:
  Heavy water is

1.deuterium oxide

2.ph7

3.rain water

4.tritium oxide

Posted Date:-2021-03-07 03:30:36


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

1.sodium

2.barium

3.mercury

4.potassium

Posted Date:-2021-03-07 03:30:36


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

Posted Date:-2021-03-07 03:30:36


Question:
  Marsh gas is

1.nitrogen

2.ethane

3.methane

4.hydrogen

Posted Date:-2021-03-07 03:30:36


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

Posted Date:-2021-03-07 03:30:36


Question:
  Production of chlorofluorocarbons (CFC) gas which is proposed to be banned in India, is used in which of the following domestic products?

1.Television

2.Refrigerator

3.Tube light

4.Cooking gas

Posted Date:-2021-03-07 03:30:36


Question:
  Tetraethyl lead is used as

1.pain killer

2.fire extinguisher

3.mosquito repellent

4.petrol additive

Posted Date:-2021-03-07 03:30:36


Question:
  The hardest substance available on earth is

1.Gold

2.Iron

3.Diamond

4.Platinum

Posted Date:-2021-03-07 03:30:36


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

1.bitumen

2.anthracite

3.lignite

4.peat

Posted Date:-2021-03-07 03:30:36


Question:
 Carbon, diamond and graphite are together called

1.allotropes

2.isomers

3.isomorphs

4.isotopes

Posted Date:-2021-03-07 03:30:36


Question:
 Non stick cooking utensils are coated with

1.Teflon

2.PVC

3.black paint

4.polystyrene

Posted Date:-2021-03-07 03:30:36


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

1. sodium carbonate

2.alum

3.potassium permanganate

4.lime

Posted Date:-2021-03-07 03:30:36


Question:
 Sodium metal is kept under

1.petrol

2.alcohol

3.water

4.kerosene

Posted Date:-2021-03-07 03:30:36


Question:
 The gases used in different types of welding would include

1.oxygen and hydrogen

2.oxygen, hydrogen, acetylene and nitrogen

3.oxygen, acetylene and argon

4.oxygen and acetylene

Posted Date:-2021-03-07 03:30:36


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

Posted Date:-2021-03-07 03:30:36


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

1.Tritium

2.Deuterium

3.Protium

4.Yttrium

Posted Date:-2021-03-07 03:30:36


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

Posted Date:-2021-03-07 03:30:36


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

Posted Date:-2021-03-07 03:30:36


Question:
Bromine is a

1. black solid

2. red liquid

3.colourless gas

4.highly inflammable gas

Posted Date:-2021-03-07 03:30:36


Question:
Chemical formula for water is

1.NaAlO2

2.H2O

3.Al2O3

4.CaSiO3

Posted Date:-2021-03-07 03:30:36


Question:
Chlorophyll is a naturally occurring chelate compound in which central metal is

1.copper

2.magnesium

3.iron

4.calcium

Posted Date:-2021-03-07 03:30:36


Question:
Galvanised iron sheets have a coating of

1.lead

2.chromium

3.zinc

4.tin

Posted Date:-2021-03-07 03:30:36


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

Posted Date:-2021-03-07 03:30:36


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

Posted Date:-2021-03-07 03:30:36


Question:
Monazite is an ore of

1.titanium

2.zirconium

3.iron

4.thorium

Posted Date:-2021-03-07 03:30:36


Question:
Most soluble in water is

1.camphor

2.sulphur

3.common salt

4.sugar

Posted Date:-2021-03-07 03:30:36


Question:
Permanent hardness of water can be removed by adding

1.chlorine

2.washing soda

3.potassium permanganate

4.bleaching powder

Posted Date:-2021-03-07 03:30:36


Question:
Potassium nitrate is used in

1.medicine

2.fertiliser

3.salt

4.glass

Posted Date:-2021-03-07 03:30:36


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

Posted Date:-2021-03-07 03:30:36


Question:
Soda water contains

1.carbonic acid

2. sulphuric acid

3.carbon dioxide

4.nitrous acid

Posted Date:-2021-03-07 03:30:36


Question:
The average salinity of sea water is

1.3%

2.4%

3.3%

4.2%

Posted Date:-2021-03-07 03:30:36


Question:
The chemical (ethyl mercaptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of

1.bromine

2.fluorine

3.chlorine

4.sulphur

Posted Date:-2021-03-07 03:30:36


Question:
The element common to all acids is

1.hydrogen

2.carbon

3.sulphur

4.oxygen

Posted Date:-2021-03-07 03:30:36


Question:
The filament of an electric bulb is made of

1.tungsten

2.nichrome

3.graphite

4.iron

Posted Date:-2021-03-07 03:30:36


Question:
The gas usually filled in the electric bulb is

1.nitrogen

2.hydrogen

3.carbon dioxide

4.oxygen

Posted Date:-2021-03-07 03:30:36


Question:
The group of metals Fe, Co, Ni may best called as

1.transition metals

2.main group metals

3.alkali metals

4.rare metals

Posted Date:-2021-03-07 03:30:36


Question:
The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is

1.Argon

2.Xenon

3.Helium

4.Krypton

Posted Date:-2021-03-07 03:30:36


Question:
The most important ore of aluminium is

1.galena

2.calamine

3.calcite

4.bauxite

Posted Date:-2021-03-07 03:30:36


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

1.osmosis

2.deliquescence

3.efflorescence

4.desiccation

Posted Date:-2021-03-07 03:30:36


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

Posted Date:-2021-03-07 03:30:36


Question:
Washing soda is the common name for

1. Sodium carbonate

2.Calcium bicarbonate

3.Sodium bicarbonate

4.Calcium carbonate

Posted Date:-2021-03-07 03:30:36


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

Posted Date:-2021-03-07 03:30:36


Question:
What is laughing gas?

1.Nitrous Oxide

2.Carbon monoxide

3.Sulphur dioxide

4.Hydrogen peroxide

Posted Date:-2021-03-07 03:30:36


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

Posted Date:-2021-03-07 03:30:36


Question:
Which metal pollute the air of a big city?

1.Copper

2.Chromium

3.Lead

4.Cadmium

Posted Date:-2021-03-07 03:30:36


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

Posted Date:-2021-03-07 03:30:36


Question:
Which of the following does not contain a coinage metal?

1.Silver and Gold

2.Zinc and Gold

3. Copper and Silver

4.Copper and Gold

Posted Date:-2021-03-07 03:30:36


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

1.Phosphorous

2.Bromine

3.Chlorine

4.Helium

Posted Date:-2021-03-07 03:30:36


Question:
Which of the following is an element?

1.Ruby

2.Sapphire

3.Emerald

4.Diamond

Posted Date:-2021-03-07 03:30:36


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

1.Lithium

2.Sodium

3.Francium

4.Cerium

Posted Date:-2021-03-07 03:30:36


Question:
Which of the following is the lightest metal?

1.Mercury

2.Lithium

3.Lead

4.Silver

Posted Date:-2021-03-07 03:30:36


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

1.Graphite

2.Silica

3.Iron Oxide

4.Diamond

Posted Date:-2021-03-07 03:30:36


Question:
Which of the following is used in pencils?

1.Graphite

2.Silicon

3.Charcoal

4.Phosphorous

Posted Date:-2021-03-07 03:30:36


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

1.Tin

2.Mercury

3.Lead

4.Zinc

Posted Date:-2021-03-07 03:30:36


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

1.Radium

2.Zinc

3.Uranium

4.Mercury

Posted Date:-2021-03-07 03:30:36


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

1.Krypton

2.Xenon

3.Neon

4.Helium

Posted Date:-2021-03-07 03:30:36


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

1.Methane

2.Nitrous oxide

3.Carbon dioxide

4.Hydrogen

Posted Date:-2021-03-07 03:30:36


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