Que- The number of waves made by an electron moving in an orbit having maximum magnetic quantum number is +3
a. 4
b. 5
c. 2
d. zero
Answer- 4
Que- The number of atoms present in 21.6 gram of silver (atomic weight = 108) are same as the molecules in
a. 1.8 gram of H2O
b. 12 moles of KMnO4
c. 0.6N H2SO4
d. 4.6 gram of C2H5OH
Answer- 12 moles of KMnO4
Que- Brass is made of
a. Copper and tin
b. Tin and lead
c. Copper and zinc
d. Copper, tin and zinc
Answer- Copper and zinc
Que- Bridgmanite is
a. A bridge on the river Thames
b. Name of a game
c. Earth’s most abundant mineral
d. Name of a music
Answer- Earth’s most abundant mineral
Que- Bronze is an alloy of
a. Copper and Zinc
b. Tin and Zinc
c. Copper and Tin
d. Iron and Zinc
Answer- Copper and Tin
Que- Percentage of carbon in steel ranges from
a. 0.1 to 1.5
b. 1.5 to 3.0
c. 3.0 to 4.0
d. 4.0 to 6.0
Answer- 0.1 to 1.5
Que- Copper is refined by
a. Roasting
b. Oxidation
c. Electrolysis
d. Zone refining
Answer- Roasting
Que- Where does the oxygen that keeps us alive come from?
a. Carbon dioxide
b. Carbonates absorbed from soil
c. Oxides of minerals
d. Water
Answer- Water
Que- In chemical terms, what are alums used for purifying water for drinking purposes ?
a. Hydrated chlorides
b. Double nitrate
c. Double sulphates
d. Nitrates of aluminium
Answer- Double sulphates
Que- Brown stains in vessels and clothes indicate the presence of high quantities of ________ in water.
a. Magnesium
b. Calcium
c. Manganese
d. None of these
Answer- None of these
Que- If water smells bad, then that odour can be removed by adding
a. Alum
b. Bleach
c. Activated carbon
d. Deactivated nitrogen
Answer- Activated carbon
Que- Surface water is a better source of drinking water because it is poor in
a. Dust
b. Bacteria
c. Arsenic
d. Algae
Answer- Arsenic
Que- Heavy metal pollution of water is caused by:
a. Paints
b. Wood burning
c. Acid Plants
d. Domestic sewage
Answer- Paints
Que- Ozone layer in the upper parts of the atmosphere serves as a protective shield against harmful
a. Solar ultraviolet radiation
b. Solar infrared radiation
c. CO2 in the air
d. SO2 in the air
Answer- Solar ultraviolet radiation
Que- 'Bhopal gas tragedy' 1984 is related to which gas
a. Aluminium Phosphide
b. Methyl bromide
c. Methyl isocyanate
d. Carbon dioxide
Answer- Methyl isocyanate
Que- When a nutrient like fertilizer is present in large quantities in a water bodies, plants grow and decay in large numbers because of suffocation of pond that does not leave enough oxygen needed to support life. This type of pollution is called
a. Smog
b. Eutrophication
c. Green house effect
d. None of these
Answer- Eutrophication
Que- Which of the following is the correct sequence of countries in terms of maximum carbon dioxide emission?
a. China, USA, European Union, India
b. USA, India, China, European Union
c. China, India, European Union, USA
d. European Union, China, USA, India
Answer- China, USA, European Union, India
Que- Normal rainwater is slightly acidic due to the presence of
a. Carbon dioxide
b. Sulphur dioxide
c. Methane
d. None of the above
Answer- Carbon dioxide
Que- Global warming is mainly due to accumulation of
a. Oxides of nitrogen
b. Oxides of sulphur
c. Carbon dioxide
d. Carbon monoxide
Answer- Carbon dioxide
Que- Main pollutants released from iron and steel industry are
a. CO, CO2 and SO2
b. NO, SO3 and H2S
c. CO2, H2S and NO2
d. CO2, NO2 and SO3
Answer- CO, CO2 and SO2
Que- Which one of the following is a major green house gas?
a. Carbon dioxide
b. Chloro fluorocarbon
c. Carbon monoxide
d. Freon
Answer- Carbon dioxide
Que- The 'solid waste' is also known as
a. Sedge
b. Toxic waste
c. Sludge
d. Scrubber
Answer- Sludge
Que- Periodic table contains how many periods
a. 6
b. 7
c. 8
d. 10
Answer- 7
Que- Which one is the lightest element in the periodic table
a. Hydrogen
b. Helium
c. Oxygen
d. Carbon
Answer- Hydrogen
Que- Which one of the following is most electronegative?
a. Carbon
b. Silicon
c. Lead
d. Tin
Answer- Carbon
Que- Periodic table contains how many groups
a. 16
b. 17
c. 18
d. 19
Answer- 18
Que- Total number of elements in the Periodic table
a. 112
b. 115
c. 118
d. 127
Answer- 118
Que- Synthetic detergents are prepared from
a. Potassium salts of higher fatty-acids
b. Sodium salts of higher fattyacids
c. Hydrocarbons of petroleum
d. Glycerides
Answer- Hydrocarbons of petroleum
Que- What is a mixture of potassium nitrate, powdered charcoal and sulphur called?
a. Glass
b. Cement
c. Paint
d. Gun powder
Answer- Gun powder
Que- Iodex, a pain relief balm, has the smell of ________ .
a. Methyl salicylate
b. Ethyl salicylate
c. Propyl salicylate
d. Butyl salicylate
Answer- Methyl salicylate
Que- Silver halides are used in photographic plates because they are
a. Oxidised in air
b. Soluble in hyposolution
c. Reduced by light
d. Totally colourless
Answer- Reduced by light
Que- Who developed Hydrogen Bomb?
a. Wernher Von Braun
b. J. Robert Oppen Heimer
c. Edward Teller
d. Samuel Cohen
Answer- Edward Teller
Que- Bleaching powder is used in drinking water as a/an
a. Disinfectant
b. Antibiotic
c. Antiseptic
d. Coagulant
Answer- Disinfectant
Que- The process of removing calcium and magnesium from hard water is known as
a. Sedimentation
b. Filtration
c. Flocculation
d. Water softening
Answer- Water softening
Que- Hard water and soft water can be distinguished by using
a. Dilute acid
b. Ordinary soap
c. Detergent
d. Liquid soap
Answer- Detergent
Que- Which method will be employed to test the hardness of water?
a. Boiling
b. Distillation
c. Formation of lather with soap
d. None of these
Answer- Formation of lather with soap
Que- The purest form of water is
a. Tap water
b. Rain water
c. Ground water
d. Distilled water
Answer- Rain water
Que- The hardest form of carbon is
a. coke
b. graphite
c. diamond
d. charcoal
Answer- diamond
Que- The most important ore of aluminium is
a. bauxite
b. magnetite
c. haematite
d. monazite
Answer- bauxite
Que- The organic reaction represented by equation CH3 - CH = O + H2NOH gives CH3 - CH - NH + H2O is an example of
a. an addition reaction
b. a condensation reaction
c. an oxidation reaction
d. an elimination reaction
Answer- a condensation reaction
Que- The number of electrons presents in H+ is
a. zero
b. one
c. two
d. three
Answer- zero
Que- The hottest part of the gas flame is known as
a. luminous zone
b. dark zone
c. blue zone
d. non-luminous zone
Answer- luminous zone
Que- Saccharin is made up of
a. Toluene
b. Phenol
c. Propane
d. Butane
Answer- Toluene
Que- The compound to which H2 does not add is
a. Biphenyl ethylene
b. Tetraphenyl ethylene
c. Tetra – a –naphthylethylene
d. Tetra –9 – phenanthrylethylene
Answer- Tetraphenyl ethylene
Que- Which of the following is not a nitrogenous fertilizer ?
a. Ca(CN)2
b. CaCN2
c. NH4NO3
d. Urea
Answer- Ca(CN)2
Que- The pair of compounds used as anaesthetic in medicines :
a. Ether, Ammonia
b. Nitrous oxide, Chloroform
c. Chloroform, Nitrogen dioxide
d. Nitrogen dioxide, ether
Answer- Nitrous oxide, Chloroform
Que- Which of the following is used for refrigeration?
a. Sulphur dioxide
b. Chlorine
c. Freon
d. Phosphine
Answer- Freon
Que- L.P.G. is mostly liquefied
a. Hydrogen
b. Oxygen
c. Butane
d. Methane
Answer- Butane
Que- Which one of the following is not coal variety?
a. Lignite
b. Bituminous
c. Dolomite
d. Peat
Answer- Dolomite
Que- Which of the following is used to increase the anti-knocking property of petrol ?
a. Tetramethyl lead
b. Tetraethyl lead
c. Trimethyl lead
d. Triethyl lead
Answer- Tetraethyl lead
Que- The quality of petrol is expressed in terms of
a. Cetane number
b. Gold number
c. Octane number
d. Added unlead compounds
Answer- Octane number
Que- Which of the following type of coal has the lowest proportion of volatile matter ?
a. Lignite
b. Peat
c. Bituminous
d. Anthracite
Answer- Anthracite
Que- A colloidal system in which a liquid is dispersed in a liquid is called
a. Gel
b. Emulsion
c. Sol
d. Precipitate
Answer- Emulsion
Que- Which is a natural colloid ?
a. Sodium chloride
b. Urea
c. Cane-sugar
d. Blood
Answer- Blood
Que- Suspension particles have the size between
a. 10–2 – 10–4 cm
b. 10–5 – 10–7cm
c. 10–8 – 10–10cm
d. 10–1 – 10–2 cm
Answer- 10–2 – 10–4 cm
Que- Which of the following acts as best adsorbent?
a. Charcoal
b. Activated Charcoal
c. Activated Coconut Charcoal
d. Carbon black
Answer- Activated Coconut Charcoal
Que- Gelatin is mostly used in making ice-creams in order to
a. Prevent making a colloid
b. Stabilise the colloid and prevent crystallisation
c. Stabilise mixture
d. Enrich the aroma
Answer- Stabilise the colloid and prevent crystallisation
Que- 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
Answer- Sodium chloride
Que- Soap is prepared by boiling caustic soda with
a. Alcohol
b. Kerosene oil
c. Glycerine
d. Fats
Answer- Fats
Que- 'All the four quantum numbers of two electrons in an atom are not the same.' It is the law of –
a. Hund's rule of maximum multiplicity
b. Exclusion Principle of Pauli
c. Uncertainty Principle of Hiesenberg
d. Avogadro's Law
Answer- Exclusion Principle of Pauli
Que- Which of the following is not a donor atom?
a. Phosphorus
b. Antimony
c. Arsenic
d. Aluminium
Answer- Aluminium
Que- 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
Answer- Energy is always absorbed
Que- Among the following the hardest metal is
a. Gold
b. Iron
c. Platinum
d. Tungsten
Answer- Tungsten
Que- What material is used to make electric heater coil ?
a. Copper
b. Iron
c. Silver
d. Nichrome
Answer- Nichrome
Que- Among the following, which is always found in free-state in nature?
a. Gold
b. Silver
c. Sodium
d. Copper
Answer- Gold
Que- Philosopher’s Wool is
a. Zinc carbonate
b. Zinc sulphate
c. Zinc oxide
d. Zinc blende
Answer- Zinc oxide
Que- Which of the following metals has least melting point ?
a. Gold
b. Silver
c. Mercury
d. Copper
Answer- Mercury
Que- Commercial nitric acid is coloured because it contains dissolved :
a. Oxygen
b. Nitrous oxide
c. Nitrogen dioxide
d. Coloured impurities
Answer- Nitrogen dioxide
Que- Choose the incorrect statement pertaining to organic compounds
a. They have low melting and boiling points
b. They do not dissolve in water
c. They are not easily combustible
d. They contain mainly carbon and hydrogen
Answer- They are not easily combustible
Que- The gas which emits from rice field is
a. Ethane
b. Methane
c. Nitrogen
d. All of the above
Answer- Methane
Que- Ethylene is a ________ molecule.
a. Polar
b. Ionic
c. Covalent
d. Nonpolar
Answer- Nonpolar
Que- The next higher homologue of C6H14 is
a. C7H14
b. C7H12
c. C6H12
d. C7H16
Answer- C7H16
Que- In an oxygen molecule, two atoms are united by
a. One bond
b. Two bonds
c. Three bonds
d. Four bonds
Answer- Two bonds
Que- How many electrons are there in a Hydrogen atom?
a. One
b. Two
c. Three
d. Four
Answer- One
Que- The third shell of an atom can have a maximum of ______ electrons.
a. 13
b. 15
c. 18
d. 21
Answer- 18
Que- Who developed the model of atomic structure ?
a. Bohr and Rutherford
b. Volta
c. Alfred Nobel
d. Faraday
Answer- Bohr and Rutherford
Que- Which among the following is a covalent compound ?
a. Calcium chloride
b. Magnesium fluoride
c. Sodium chloride
d. Carbon tetrachloride
Answer- Carbon tetrachloride
Que- Gold dissolves in
a. Hydrochloric acid
b. Nitric acid
c. Aqua regia
d. Acetic acid
Answer- Aqua regia
Que- Nitric acid does not react with
a. Gold
b. Copper
c. Zinc
d. Iron
Answer- Gold
Que- Nitrogen in water is commonly found in the form of
a. Nitrous oxide
b. Nitrate
c. Nitric oxide
d. Nitrite
Answer- Nitrite
Que- Aquaregia is a mixture of the following in the ratio 1 : 3 by volume
a. Conc. HNO3 and conc. HCl
b. Conc. HNO3 and conc. H2SO4
c. Dil. HCl and dil. HNO3
d. Conc. HCl and conc. HNO3
Answer- Conc. HNO3 and conc. HCl
Que- One of the following is used to dissolve noble metals. That is
a. Nitric acid
b. Hydrochloric acid
c. Sulphuric acid
d. Aqua regia
Answer- Aqua regia
Que- Aspirin is
a. Methoxy benzoic acid
b. Methyl Salicilate
c. Acetyl Salicilic acid
d. Phenyl Salicilate
Answer- Acetyl Salicilic acid
Que- Aspirin is common name of
a. Salicylic Acid
b. Salicylate
c. Methyl Salicylate
d. Acetyl Salicylic Acid
Answer- Acetyl Salicylic Acid
Que- By-product obtained by soap industry is
a. Caustic soda
b. Glycerol
c. Naphthalene
d. Caustic potash
Answer- Glycerol
Que- Chloroform can be used as
a. Analgesic
b. Anaesthetic
c. Antimalarial
d. Antibiotic
Answer- Anaesthetic
Que- Soap helps in better cleaning of clothes because
a. Soap acts like catalyst
b. It reduces the surface tension of solution
c. It gives strength to solution
d. It absorbs the dirt
Answer- It reduces the surface tension of solution
Que- Rusting of iron takes place due to
a. Oxidation
b. Carbonation
c. Exfoliation
d. Corrosion
Answer- Oxidation
Que- Combustion of a candle is a/an
a. Photochemical reaction
b. Physical change
c. Endothermic reaction
d. Exothermic reaction
Answer- Exothermic reaction
Que- Which of the following is chiefly present in LPG (Liquefied Petroleum Gas) ?
a. Methane
b. Ethane
c. Propane
d. Butane
Answer- Butane
Que- Candle is a mixture of
a. Paraffin was and stearic acid
b. Bees wax and stearic acid
c. Higher fatty acids and stearic acid
d. Bees wax and paraffin wax
Answer- Paraffin was and stearic acid
Que- Coal is formed from
a. Crude oil
b. Deposit of animal waste
c. Coke
d. Compressed and hardened biomass
Answer- Compressed and hardened biomass
Que- Which one of the following forms of phosphorus is most reactive?
a. Black phosphorus
b. White phosphorus
c. Violet phosphorus
d. Red phosphorus
Answer- White phosphorus
Que- Limestone is a raw material used by which industry?
a. Aluminium
b. Fertilizers
c. Cement
d. Petrochemicals
Answer- Cement
Que- The element absorbed both in cation and anion form is
a. Sulphur
b. Nitrogen
c. Calcium
d. Phosphorus
Answer- Nitrogen
Que- Cement containing excess amount of lime
a. Cracks during setting
b. Becomes more strong
c. Is slow setting
d. Is quick setting
Answer- Becomes more strong
Que- Commercially, sodium bicarbonate is known as
a. Washing soda
b. Baking soda
c. Bleaching powder
d. Soda ash
Answer- Baking soda
Que- All isotopes of the same element have ________
a. Different atomic numbers and different atomic mass
b. Different atomic numbers and the same atomic mass
c. The same atomic number but different atomic masses
d. The same atomic number and the atomic mass
Answer- The same atomic number but different atomic masses
Que- The fundamental particles present in the nucleus of an atom are
a. Electron, proton
b. Proton, neutron
c. Neutron, electron
d. Neutron, positron
Answer- Proton, neutron
Que- J.J. Thomson’s proposed model of atom is generally called ________ model.
a. Cream and cake
b. Plum and pudding
c. Plum and cake
d. Cream and pudding
Answer- Plum and pudding