+100 Important Chemistry Questions (MCQ) and Answer
Q1.
Beryllium Sulphate is less soluble in water due to ?
(a)High inflammable energy
(b) Low Energy of dissociation
(c) Low inflammable energy
(d) ionic band
Q2.
What is the name of that system which uses
radioactivity to decide the period of materials of pre
his tone period ?
(a) Radium dating
(b) Uranium dating
(c) Carbon dating
(d) Deuterium dating
Q3.
Cement is made hard with
(a) dehydration
(b) hydration and dissociation of water
(c) Dissociation of water
(d) Polymerisation
Q4.
What happens when a chemical bond is formed ?
(a) energy is always absorbed
(b) energy in always released
(c) more energy is released than is absorbed
(d) energy is neither released nor absorbed
Q5.
Which among the following is a carbohydrate ?
(a) Nylon
(b) Cane sugar
(c) Turpentine
(d) Hydrogen peroxide
Q6.
In which of the following states maximum iron ore is
found ?
(a) FeC03
(b) Fe203
(c) Fe304
(d) FeS2
Q7.
Which one of the following metals pollutes the air of a
city having large number of automobiles?
(a) Cadmium
(b) Chromium
(c) Lead
(d) Copper
Q8.
What is the Chemical name for baking soda?
(a) Sodium carbonate
(b) Sodium bicarbonate
(c) Sodium nitrite
(d) Sodium nitrate
Q9.
An atomic pile is used for
(a) producing X rays
(b) conducting nuclear fission
(c) conducting thermonuclear fusion
(d) accelerating atoms
Q10.
Which of the following gases is present under
pressure in soft drinks?
(a) Oxygen
(b) Nitrogen
(c) Carbon dioxide
(d) Nitrous oxide
Q11.
The substance which does not expand on going from
liquid state to solid state is
(a) Water
(b) Castiron
(c) Aluminium
(d) Type metal
Q12.
heart pacemakers is
(a) Uranium
(b) Deuterium
(c) Plutonium
(d) Radium
Q13.
The element which is commonly used in nuclear for
producing electricity by nuclear fission is
(a) Radium
(b) Plutonium
(c) Uranium
(d) Deuterium
Q14.
Table salt gets moist during rainy season because
(a) sodium chloride is hygroscopic
(b) sodium chloride is deliquescent
(c)(3 ) sodium chloride contains some quantity of
sodium iodide
(d) sodium chloride contains hygroscopic impurities
like magnesium chloride
Q15.
Which of the following is used as a lubricant in heavy
machines?
(a) Bauxite
(b) Sulphur
(c) Phosphorus
(d) Graphite
Q16.
The anode in a dry cell consists of
(a) Copper
(b) Zinc
(c) Cadmium
(d) Graphite
Q17.
Which of the following is used to iodine common salt
?
(a) Potassium iodide
(b) Iodine
(c) Potassium iodide
(d) Sodium iodide
Q18.
Milk is a colloidal system in which:
(a) Water is dispersed in fat
(b) Fat is dispersed in water
(c) Fat and water are dispersed in each other
(d) Fat is dissolved
Q19.
The enzyme that converts glucose to ethyl alcohol is :
(a) Invertase
(b) Maltase
(c) Zymase
(d) Diastase
Q20.
Silk fibre chemically is :
(a) Carbohydrate
(b) Fat
(c) Protein
(d) Cellulose
Q21.
Who developed Hydrogen Bomb?
(a) Werner Von Braun
(b) J. Robert Oppen Heimer
(c) Edward Teller
(d) Samuel Cohen
Q22.
When there are two electrons in the same orbital they
have:
(a) same spin
(b) opposite spin
(c) same or opposite spin
(d) no spin
Q23.
Galvanization is the :
(a) deposition of zinc on iron
(b) deposition of tin on Iron
(c) deposition of copper on iron
(d) deposition of aluminum on iron
Q24.
Fermentation of milk to curd is due to :
(a) Mycobacterium
(b) Staphylococcus
(c) Lactobacillus
(d) Yeasts
Q25.
By which organic compound all the oils arc known ?
(a) Carbohydrate
(b) Protein
(c) Hydrocarbon
(d) Ester
Q26.
The atomic number of carbon is 6 and its atomic mass
is How many are there protons in the nucleus of
carbon ?
(a)6
(b) 12
(c) 18
(d) Zero
Q27.
Who developed atom bomb ?
(a) Warner Wan Brown
(b) J. Robert Open heimer
(c) Edward Taylor
(d) Samuel Koehen
Q28.
The major harmful gas emitted by automobile vehicle
which causes air pollution is
(a) Carbon Monoxide
(b) Methane
(c) Carbon dioxide
(d) Ozone gas
Q29.
The add used in lead storage cells is
(a) phosphoric acid
(b) hydrochloric acid
(c) nitric acid
(d) sulphuric acid
Q30.
Milk tastes sour when kept in the open for sometime
due to the formation of .
(a) lactic acid
(b) citric acid
(c) acetic acid
(d) carbonic acid
Q31.
What is the most commonly used Substance in
fluorescent tubes?
(a) Sodium oxide and argon
(b) Sodium vapour and neon
(c) Mercury vapour and argon
(d) Mercury oxide and neonv
Q32
What is "milk of magnesia” chemically ?
(a) Magnesium carbonate
(b) Sodium bicarbonate
(c) Calcium hydroxide
(d) Magnesium hydroxide
Q33.
Bronze is an alloy of
(a) Copper and Zinc
(b) Tin and Zinc
(c) Copper and Tin
(d) Iron and Zinc.
Q34.
The natural source of hydrocarbon is
(a) Crude oil
(b) Biomass
(c) Coal
(d) Carbohydrates
Q35.
Which of the following is chiefly present in LPG
(Liquefied Petroleum Gas)?
(a) Methane
(b) Ethane
(c) Propane
(d) Butane
Q36.
Which one of the following metals is used to galvanise
iron?
(a) Copper
(b) Lead
(c) Zinc
(d) Mercury
Q37.
Which of the following is not a precious semiprecious
stone?
(a) Sapphire
(b) Ruby
(c) Pearl
(d) Emerald
Q38.
Which among the following metals provides
atmospheric oxide?
(a) Sodium
(b) Silver
(c) Aluminium
(d) Calcium
Q39.
Humburger effect is otherwise known as
(a) Sodium pump
(b) Anaerobic metabolism
(c) Choloride shift
(d) Respiratory product
Q40.
Which among the following elements is found in
maximum percentage in the human body ?
(a) Carbon
(b) Hydrogen
(c) Nitrogen
(d) Oxygen
Q41.
Which among the following stage is suitable indicator
when solution of sodium carbonate is mixed with
sulphuric acid ?
(a) Methylene blue
(b) Methyl red
(c) Phenolphthaline
(d) Methyl orange
Q42.
Which among the following is pure matter ?
(a) Carbondioxide
(b) Brass
(c) Air
(d) Iron
Q43.
Which among the following coal contains 90 per cent
of carbon?
(a) Anthracite
(b) Bitumen
(c) Lignite
(d) Peat
Q44.
Bauxite is an alloy of which of the following metals ?
(a) Aluminium
(b) Silver
(c) Tin
(d) Iron
Q45.
Nucleus of an atom consists of
(a) Proton
(b) Neutron
(c) Proton and Neutron
(d) Electron Proton and Neutron
Q46.
Milk of Magnesia is a suspension of :
(a) magnesium sulphate
(b) magnesium carbonate
(c) magnesium hydroxide
(d) magnesium chloride
Q47.
Quartz is made of
(a) Calcium Sulphate
(b) Calcium Silicate
(c) Sodium Sulphate
(d) Sodium Silicate
Q48.
Which of the following is ozone depleting pesticide ?
(a) D.D.T.
(b) Benzene
(c) Methyl bromide
(d) Ethylene ozonide
Q49.
Galvanised iron is made by coating iron with
(a) Zinc
(b) Nickel
(c) Chromium
(d) Sulphur
Q50.
Which is abundant in Gobar gas?
(a) Carbon dioxide
(b) Methane
(c) Oxygen
(d) Hydrogen
Q51.
What is the element that is in the highest percentage
in the composition of the earth ?
(a) Silicon
(b) Oxygen
(c) Magnesium
(d) Iron
Q52.
Formation of ozone hole is maximum over
(a) Africa
(b) India
(c) Antarctica
(d) Europe
Q53.
The presence of ozone in the stratosphere is
responsible for
(a) increasing the average global temperature in
recent years
(b) higher rate of photosynthesis
(c) checking the penetration of ultraviolet rays to the
earth
(d) supplying oxygen for people travelling in jets
Q54.
The advantage of detergents over soaps is
(a) Detergents are soluble in water
(b) Detergents could not give much lather
(c) Detergents give lather even with hard Water
(d) Soaps give lather with only soft water
Q55.
The fundamental particles present in the nucleus of
an atom are
(a) Electron proton
(b) Proton neutron
(c) Neutron electron
(d) Neutron positron
Q56.
Bleaching action of moist sulphur dioxide is because
of its
(a) basic property
(b) acidic property
(c) oxidising property
(d) reducing property
Q57.
The long range potential of nu I clear energy in India
depends on i its reserves of
(a) thorium
(b) uranium
(c) plutonium
(d) radium
Q58.
Which of the following gases will effuse out of football
bladder most quickly?
(a) He
(b) H2
(c) N2
(d) 02
Q59.
Which of the following alkali metals has highest
specific heat?
(a) Cesium
(b) Rubidium
(c) Potassium
(d) lithium
Q60.
In which of the following substances all carbon atoms
are quaternary in nature ?
(a) Graphite
(b) Diamond
(c) Teflon
(d) Napthalene
Q61.
Which of the following is a natural dye ?
(a) Crystal violet
(b) Aniline blue
(c) Alizarin
(d) Phenolphthalein
Q62.
The ratio of pure gold in 18 carat gold is
(a) 60%
(b) 75%
(c) 80%
(d) 90%
Q63.
Diamond is harder than graphite because of
(a) difference in layers of atoms
(b) tetrahedral structure of diamond
(c) difference of crystalline structures
(d) None of these
Q64.
Gobar gas contains mainly:
(a) methane
(b) ethylene
(c) propylene
(d) acetylene
Q65.
Which of the following elements is non radioactive ?
(a) Uranium
(b) Thorium
(c) Plutonium
(d) Zirconium
Q66.
The gas used for artificial fruit ripening of green fruit
is
(a) Ethylene
(b) Acetylene
(c) Ethane
(d) Methane
Q67.
What is the element required for solar energy
conversion ?
(a) Beryllium
(b) Tantalum
(c) Silicon
(d) Ultra pure carbon
Q68.
Which of the following type of coal has the lowest
proportion of volatile matter ?
(a) Lignite
(b) Peat
(c) Bituminous
(d) Anthracite
Q69.
What is the chemical name for Baking Soda?
(a) Sodium carbonate
(b) Sodium bicarbonate
(c) Sodium nitrite
(d) Sodium nitrate
Q70.
Saccharin is made up of
(a) Toluene
(b) Phenol
(c) Propane
(d) Butane
Q71.
PVC is obtained by the polymerisation of
(a) Propane
(b) Vinyl chloride
(c) Styrene
(d) Acetylene
Q72.
Which of the following vegetable oils does not contain
essential fatty acids ?
(a) Sunflower oil
(b) Mustard oil
(c) Coconut oil
(d).Groundnut oil
Q73.
Which of the following imparts deep blue colour to
glass ?
(a) Cobalt oxide
(b) Cupric oxide
(c) Ferrous oxide
(d) Nickel oxide
Q74.
Which of the following fibres catches fire least ?
(a) Nylon
(b) Cotton
(c) Rayon
(d) Terricot
Q75.
Which of the following is used as filler in tyre of
rubber ?
(a) Carbon black
(b) Coal
(c) Coke
(d) Graphite
Q76.
Which of the following alloy is used In making
magnet ?
(a) Duralumin
(b) Stainless steel
(c) Elniko
(d)Magnesium
Q77.
Milk tastes sour when it is left in open for some time.
This happens due to the formation of
(a) Lactic acid
(b) Citric acid
(c) Acetic acid
(d) Carbonic acid
Q78.
The polymerisation of which of the following is used
in manufacturing of polythene in industry ?
(a) Methane
(b) Styrene
(c) Acetylene
(d) Ethylene
Q79.
92 Which of the following chemical materials is
responsible for the depletion of ozone layer in the
atmosphere ?
(a) Nitrous oxide
(b) Carbon dioxide
(c) Chlorofluorocarbon
(d) Sulphur dioxide
Q80.
Aspirin is
(a) Methoxy benzoic acid
(b) Methyl Salicilate
(c) Acetyl Salicillc acid
(d) Phenyl Salicilate
Q81.
Cloud is a colloidal dispersion of
(a) Air in a dispersion medium of water
(b) Fog in a dispersion medium of water
(c) Mist in a dispersion medium of air
(d) Water drops in a dispersion medium of air
Q82.
Which of the following is the petroleum wax ?
(a) Bees wax
(b) Camaubawax
(c) Paraffin wax
(d) Jojoba wax
Q83.
Which variety of coal contains recognizable traces of
the original plant material ?
(a) Anthracite
(b) Lignite
(c) Peat
(d) Bitumen
Q84.
Which is the purest form of iron ?
(a) Steel
(b) Cast iron
(c) Pig iron
(d) Wrought iron
Q85.
Which of the following metals form an amalgam with
other metals ?
(a) Lead
(b) Tin
(c) Zinc
(d) Mercury
Q86.
Detergents used for cleaning clothes and utensils
contain
(a) nitrates
(b) bicarbonates
(c) sulphonates
(d) bismuthates
Q87.
Radioactive disintegration of uranium ultimately
results in formation of
(a) radium
(b) thorium
(c) polonium
(d) lead
Q88.
Which of the following is used in making smoke
bombs?
(a) Sulphur
(b) Phosphorus
(c) Hydrogen
(d) Carbon
Q89.
German silver is an alloy of
(a) copper nickel and silver
(b) silver copper and aluminium
(c) zinc copper and nickel
(d) zinc silver and copper
Q90.
A metal is exposed to the atmosphere for sometime It
becomes coated with green carbonate. The metal
must be
(a) silver
(b) copper
(c) aluminium
(d) zinc
Q91.
Which of the following pairs of materials serves as
electrodes in chargeable batteries commonly used in
devices such as torch lights electric shavers etc.?
(a) Iron and cadmium
(b) Nickel and cadmium
(c) Lead peroxide and lead
(d) Zinc and carbon
Q92.
Which of the following is a super cooled liquid ?
(a) Ice Cream
(b) Teflon
(c) Glass
(d) Mercury
Q93.
Metal are good conductors because
(a) they contain free electrons
(b) the molecules in them are very close to each other
(c) the molecules in them collide Very freely
(d) they contain reflecting surface
Q94.
The first metal used by a man was
(a) Copper
(b) Silver
(c) Bronze
(d) Brass
Q95.
(c) Chlorofluorocarbon
(d) Sulphur dioxide
Q80.
Aspirin is
(a) Methoxy benzoic acid
(b) Methyl Salicilate
(c) Acetyl Salicillc acid
(d) Phenyl Salicilate
Q81.
Cloud is a colloidal dispersion of
(a) Air in a dispersion medium of water
(b) Fog in a dispersion medium of water
(c) Mist in a dispersion medium of air
(d) Water drops in a dispersion medium of air
Q82.
Which of the following is the petroleum wax ?
(a) Bees wax
(b) Camaubawax
(c) Paraffin wax
(d) Jojoba wax
Q83.
Which variety of coal contains recognizable traces of
the original plant material ?
(a) Anthracite
(b) Lignite
(c) Peat
(d) Bitumen
Q84.
Which is the purest form of iron ?
(a) Steel
(b) Cast iron
(c) Pig iron
(d) Wrought iron
Q85.
Which of the following metals form an amalgam with
other metals ?
(a) Lead
(b) Tin
(c) Zinc
(d) Mercury
Q86.
Detergents used for cleaning clothes and utensils
contain
(a) nitrates
(b) bicarbonates
(c) sulphonates
(d) bismuthates
Q87.
Radioactive disintegration of uranium ultimately
results in formation of
(a) radium
(b) thorium
(c) polonium
(d) lead
Q88.
Which of the following is used in making smoke
bombs?
(a) Sulphur
(b) Phosphorus
(c) Hydrogen
(d) Carbon
Q89.
German silver is an alloy of
(a) copper nickel and silver
(b) silver copper and aluminium
(c) zinc copper and nickel
(d) zinc silver and copper
Q90.
A metal is exposed to the atmosphere for sometime It
becomes coated with green carbonate. The metal
must be
(a) silver
(b) copper
(c) aluminium
(d) zinc
Q91.
Which of the following pairs of materials serves as
electrodes in chargeable batteries commonly used in
devices such as torch lights electric shavers etc.?
(a) Iron and cadmium
(b) Nickel and cadmium
(c) Lead peroxide and lead
(d) Zinc and carbon
Q92.
Which of the following is a super cooled liquid ?
(a) Ice Cream
(b) Teflon
(c) Glass
(d) Mercury
Q93.
Metal are good conductors because
(a) they contain free electrons
(b) the molecules in them are very close to each other
(c) the molecules in them collide Very freely
(d) they contain reflecting surface
Q94.
The first metal used by a man was
(a) Copper
(b) Silver
(c) Bronze
(d) Brass
Q95.
Which of the following is used to remove rust stains
on cloth?
(a) Kerosene
(b) Lime
(c) Oxalic acid solution
(d) Petrol
Q96.
Curd is sour due to presence of
(a) Tartaric acid
(b) Lactic acid
(c) Acetic acid
(d) Oxalic acid
Q97.
Tear gas is
(a) Chloroprene
(b) Carbonyl chloride
(c) Nitrous oxide
(d) Bleaching powder
Q98.
Which of the following compounds is commonly used
as an antiseptic in mouthwashes and toothpastes?
(a) Borax
(b) Saltpetre
(c) Hydrogen peroxide
(d) Sodium chloride
Q99.
Which one of the following is used to restore the
colour of old oil paintings?
(a) Ozone
(b) Hydrogen peroxide
(c) Barium peroxide
(d) Sodium peroxide
Q100.
Milk is a natural
(a) Solution
(b) Emulsion
(c) Mixture
(d) Suspension
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