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


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


Question:
  Balloons are filled with

1.nitrogen

2.helium

3.oxygen

4.argon


Question:
  Bell metal is an alloy of

1. nickel and copper

2.zinc and copper

3.brass and nickel

4.tin and copper


Question:
  From which mineral is radium obtained?

1.Rutile

2.Haematite

3.Limestone

4.Pitchblende


Question:
  Heavy water is

1.deuterium oxide

2.ph7

3.rain water

4.tritium oxide


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

1.sodium

2.barium

3.mercury

4.potassium


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


Question:
  Marsh gas is

1.nitrogen

2.ethane

3.methane

4.hydrogen


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


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


Question:
  Tetraethyl lead is used as

1.pain killer

2.fire extinguisher

3.mosquito repellent

4.petrol additive


Question:
  The hardest substance available on earth is

1.Gold

2.Iron

3.Diamond

4.Platinum


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


Question:
 Carbon, diamond and graphite are together called

1.allotropes

2.isomers

3.isomorphs

4.isotopes


Question:
 Non stick cooking utensils are coated with

1.Teflon

2.PVC

3.black paint

4.polystyrene


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

1. sodium carbonate

2.alum

3.potassium permanganate

4.lime


Question:
 Sodium metal is kept under

1.petrol

2.alcohol

3.water

4.kerosene


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


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


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

1.Tritium

2.Deuterium

3.Protium

4.Yttrium


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


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


Question:
Bromine is a

1. black solid

2. red liquid

3.colourless gas

4.highly inflammable gas


Question:
Chemical formula for water is

1.NaAlO2

2.H2O

3.Al2O3

4.CaSiO3


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

1.copper

2.magnesium

3.iron

4.calcium


Question:
Galvanised iron sheets have a coating of

1.lead

2.chromium

3.zinc

4.tin


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


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


Question:
Monazite is an ore of

1.titanium

2.zirconium

3.iron

4.thorium


Question:
Most soluble in water is

1.camphor

2.sulphur

3.common salt

4.sugar


Question:
Permanent hardness of water can be removed by adding

1.chlorine

2.washing soda

3.potassium permanganate

4.bleaching powder


Question:
Potassium nitrate is used in

1.medicine

2.fertiliser

3.salt

4.glass


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


Question:
Soda water contains

1.carbonic acid

2. sulphuric acid

3.carbon dioxide

4.nitrous acid


Question:
The average salinity of sea water is

1.3%

2.4%

3.3%

4.2%


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


Question:
The element common to all acids is

1.hydrogen

2.carbon

3.sulphur

4.oxygen


Question:
The filament of an electric bulb is made of

1.tungsten

2.nichrome

3.graphite

4.iron


Question:
The gas usually filled in the electric bulb is

1.nitrogen

2.hydrogen

3.carbon dioxide

4.oxygen


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


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


Question:
The most important ore of aluminium is

1.galena

2.calamine

3.calcite

4.bauxite


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

1.osmosis

2.deliquescence

3.efflorescence

4.desiccation


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


Question:
Washing soda is the common name for

1. Sodium carbonate

2.Calcium bicarbonate

3.Sodium bicarbonate

4.Calcium carbonate


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


Question:
What is laughing gas?

1.Nitrous Oxide

2.Carbon monoxide

3.Sulphur dioxide

4.Hydrogen peroxide


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


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

1.Copper

2.Chromium

3.Lead

4.Cadmium


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


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


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

1.Phosphorous

2.Bromine

3.Chlorine

4.Helium


Question:
Which of the following is an element?

1.Ruby

2.Sapphire

3.Emerald

4.Diamond


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

1.Lithium

2.Sodium

3.Francium

4.Cerium


Question:
Which of the following is the lightest metal?

1.Mercury

2.Lithium

3.Lead

4.Silver


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

1.Graphite

2.Silica

3.Iron Oxide

4.Diamond


Question:
Which of the following is used in pencils?

1.Graphite

2.Silicon

3.Charcoal

4.Phosphorous


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

1.Tin

2.Mercury

3.Lead

4.Zinc


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

1.Radium

2.Zinc

3.Uranium

4.Mercury


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

1.Krypton

2.Xenon

3.Neon

4.Helium


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

1.Methane

2.Nitrous oxide

3.Carbon dioxide

4.Hydrogen


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