Que- Brass is an alloy of
a. Lead and tin
b. Zinc and copper
c. Antimony, tin and lead
d. Zinc, tin and copper
Answer- Zinc and copper
Que- Brass is an alloy of :
a. Cu, Al and Zn
b. Cu and Sn
c. Cu and Zn
d. Al and Mg
Answer- Cu and Zn
Que- The gas used for artificial ripening of green fruit is
a. ethylene
b. ethane
c. carbon dioxide
d. acetylene
Answer- ethylene
Que- Zone refining is used for the purification of
a. Au
b. Ge
c. Ag
d. Cu
Answer- Ge
Que- The main chemical constituent of the oil of cardamom which is responsible for flavour of this oil is
a. cineole
b. engenol
c. geraniol
d. limonene
Answer- cineole
Que- The molecule which has the highest percentage of ionic character among the following is
a. HI
b. HF
c. HCI
d. HBr
Answer- HF
Que- The high reactivity of fluorine is due to
a. its high electro negativity
b. small size of fluorine atom
c. availability of d-orbitals
d. strong F - F bond
Answer- its high electro negativity
Que- Diamonds are glittering and attractive because light incident on them undergoes
a. Highest refraction
b. Multiple internal reflections
c. Multiple surface reflections
d. Hundred percent transmission
Answer- Multiple internal reflections
Que- If lime water is kept in the air, it turns milky due to presence of :
a. Carbon dioxide
b. Nitrogen
c. Oxygen
d. Sulphurdioxide
Answer- Carbon dioxide
Que- 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
Answer- Difference in layers of atoms
Que- The gas used to extinguish fire is
a. Neon
b. Nitrogen
c. Carbon dioxide
d. Carbon monoxide
Answer- Carbon dioxide
Que- Which among the following coal contains 90 per cent of carbon?
a. Anthracite
b. Bitumen
c. Lignite
d. Peat
Answer- Anthracite
Que- Which of the following is not a nitrogenous fetiliser?
a. Ammonium sulphate
b. Urea
c. Ammonium nitrate
d. Superphosphate
Answer- Superphosphate
Que- Which one of the following is used as a sowing agent in the preparation of soft drinks?
a. Phosphoric acid
b. Phosphorus acid
c. Salicylic acid
d. Boric acid
Answer- Phosphoric acid
Que- Pyrethrin used in mosquito coil is obtained from
a. A seed plant
b. An insect
c. A bacterium
d. A fungus
Answer- A seed plant
Que- What is a common name for the substance which irritates lachrymal glands ?
a. Tear Gas
b. Laughing Gas
c. Anaesthetic Gas
d. Noble Gas
Answer- Tear Gas
Que- The material used in solar cells contains
a. Tin
b. Silicon
c. Caesium
d. Thallium
Answer- Silicon
Que- The nuclear particle having no mass and no charge, but only spin is
a. Proton
b. Neutrino
c. Meson
d. Electron
Answer- Neutrino
Que- The orientation of an atomic orbital is governed by
a. Principal quantum number
b. Magnetic quantum number
c. Spin quantum number
d. Azimuthal quantum number
Answer- Magnetic quantum number
Que- 'Atomic theory' of matter was given by
a. Avogadro
b. Dalton
c. Newton
d. Pascal
Answer- Dalton
Que- The most suitable unit for expressing nuclear radius is :
a. Nanometre
b. Fermi
c. Angstrom
d. Micron
Answer- Angstrom
Que- The total energy of revolving electron in an atom
a. Cannot be negative
b. Can have any value above zero
c. Can never be positive
d. Will always be positive
Answer- Can never be positive
Que- Hamburger effect is otherwise known as–
a. Sodium pump
b. Anaerobic metabolism
c. Chloride shift
d. Respiratory product
Answer- Chloride shift
Que- The inert gas used as beacon light is
a. Kr
b. Ar
c. He
d. Ne
Answer- Ne
Que- The noble gas used in radiotherapy is
a. Neon
b. Argon
c. Radon
d. Xenon
Answer- Radon
Que- Inert gases are
a. Miscible with water
b. Not stable
c. Chemically unreactive
d. Chemically very active
Answer- Chemically unreactive
Que- Which one of the following does not form oxyacid ?
a. Sulphur
b. Chlorine
c. Nitrogen
d. Fluorine
Answer- Fluorine
Que- What is the chemical symbol of mercury?
a. Mr
b. Mg
c. Hg
d. None of the above
Answer- Hg
Que- Which of the following is a monoatomic gas?
a. Oxygen
b. Neon
c. Nitrogen
d. Fluorine
Answer- Neon
Que- The purest form of water in nature is
a. Rain water
b. Lake water
c. River water
d. Sea water
Answer- Rain water
Que- In drinking water supply, which of the following treatments is not involved
a. Coagulation
b. Sedimentation
c. Softening
d. Disinfection
Answer- Softening
Que- The two metal ions that cause hardness to water are:
a. Calcium, Magnesium
b. Sodium, Calcium
c. Sodium, Potassium
d. Sodium, Magnesium
Answer- Calcium, Magnesium
Que- The iron ore magnetite consists of
a. Fe2O3
b. Fe3OH4
c. FeCO3
d. 3Fe2O3 .3H2O
Answer- Fe2O3
Que- The ionisation energy of hydrogen atom in the ground state is x KJ. The energy required for an electron to jump from 2nd orbit to 3rd orbit is
a. 5x/36
b. 5x
c. 7.2 x
d. x/6
Answer- 5x/36
Que- The major constituent of air is
a. carbon dioxide
b. nitrogen
c. oxygen
d. hydrogen
Answer- nitrogen
Que- The main chemical constituent of clay is
a. silicon oxide
b. aluminium borosilicate
c. zeolites
d. aluminium silicate
Answer- aluminium silicate
Que- The mineral containing both magnesium and calcium is
a. magnesite
b. calcite
c. carnallite
d. dolomite
Answer- dolomite
Que- Two moles of an ideal gas expand freely into vacuum. The work done by the gas is
a. 2J
b. 4J
c. Infinity
d. 0
Answer- 0
Que- The Fungus which is used in the alcohol industry is
a. Mushroom
b. Candida Aibicans
c. Yeast
d. Rhizopus
Answer- Yeast
Que- Which of the following is used to denature ethanol ?
a. Methyl alcohol
b. Propyl alcohol
c. Phenol
d. Methane
Answer- Methyl alcohol
Que- Ethanol containing 5% water is known as
a. Rectified spirit
b. Denatured spirit
c. Methylated alcohol
d. Power alcohol
Answer- Rectified spirit
Que- Alcohol prepared by the distillation of wood is :
a. Propyl alcohol
b. Methyl alcohol
c. Ethyl alcohol
d. Glycerol
Answer- Methyl alcohol
Que- London smog is found in
a. Summer during day time
b. Summer during morning time
c. Winter during morning time
d. Winter during day time
Answer- Winter during morning time
Que- Photo chemical smog is a resultant of the reaction among
a. High concentration of NO2, O3, and CO in the evening
b. CO, CO2 and NO2 at low temperature
c. CO, O2 and peroxy acetyl nitrate in the presence of Sunlight
d. NO2, O3 and peroxy acetyl nitrate in the presence of Sunlight
Answer- NO2, O3 and peroxy acetyl nitrate in the presence of Sunlight
Que- The gas involved in Bhopal incident was
a. Hydrogen sulphide
b. Nitrogen dioxide
c. Methyl chloride
d. Methyl isocyanate
Answer- Methyl isocyanate
Que- Which of the following chemicals is responsible for depletion of ozone layer in the atmosphere?
a. Chlorofluorocarbons
b. Nitrous oxide
c. Sulphur dioxide
d. Carbon dioxide
Answer- Chlorofluorocarbons
Que- Which of the following is a method/process of disposing of solid waste which cannot be reused or recycled ?
a. Landfills
b. Incineration
c. Pyrolysis and Gasification
d. All the above
Answer- All the above
Que- Sour taste of ‘Coca Cola’ is due to the presence of
a. Acetic acid
b. Phosphoric acid
c. Hydrochloric acid
d. Formic acid
Answer- Phosphoric acid
Que- An acid having basicity one is
a. Sodium dihydrogen phosphate
b. Disodium hydrogen phosphate
c. Sodium phosphate
d. Phosphoric acid
Answer- Disodium hydrogen phosphate
Que- The acid present in red ants is
a. Acetic acid
b. Butyric acid
c. Caproic acid
d. Formic acid
Answer- Formic acid
Que- Bee sting contains
a. An acidic liquid
b. A salt solution
c. An alkaline liquid
d. A corrosive liquid
Answer- An acidic liquid
Que- Sweat contains water and ________
a. Citric acid
b. Lactic acid
c. Salt
d. Vinegar
Answer- Salt
Que- The main use of salt in the diet is to
a. make the taste of food better
b. produce in small amounts the hydrochloric acid required for the digestion of food
c. ease the process of cooking
d. increase the solubility of food particles in water
Answer- produce in small amounts the hydrochloric acid required for the digestion of food
Que- The monomer of polythene is
a. vinyl chloride
b. ethylene
c. ethyl alcohol
d. None of the above
Answer- ethylene
Que- The luster of a metal is due to
a. its high density
b. its high polishing
c. its chemical inertness
d. presence of free electrons
Answer- presence of free electrons
Que- The number of water molecules present in a drop of water (volume 0.0018 ml) at room temperature is
a. 1.568 x 103
b. 6.023 x 1019
c. 4.84 x 1017
d. 6.023 x 1023
Answer- 6.023 x 1019
Que- The most malleable metal is
a. platinum
b. silver
c. iron
d. gold
Answer- gold
Que- The most pure form of Carbon among the options is
a. Anthracite
b. Lampblack
c. Graphite
d. Wood Charcoal
Answer- Anthracite
Que- Carbon footprint can be reduced by
a. All of these
b. Recycling waste materials
c. Using energy efficient appliances
d. Commuting by public transport
Answer- All of these
Que- Which of the following gases is most toxic ?
a. Carbon dioxide
b. Carbon monoxide
c. Sulphur dioxide
d. Chlorine
Answer- Carbon monoxide
Que- Why is water not suitable for putting out a petrol fire ?
a. The oxygen content of water is isolated by petrol and thus it helps in burning
b. Petrol is too inflammable to be extinguished by water
c. The heat required for combustion of petrol is very low
d. Water, being heavy, slips below petrol which thus remains in contact with air and burns
Answer- Water, being heavy, slips below petrol which thus remains in contact with air and burns
Que- Which of the following is used as a lubricant in heavy machines?
a. Bauxite
b. Sulphur
c. Phosphorus
d. Graphite
Answer- Graphite
Que- Which of the following is used in making smoke bombs?
a. Sulphur
b. Phosphorus
c. Hydrogen
d. Carbon
Answer- Carbon
Que- Water gas is the mixture of
a. Carbon dioxide and hydrogen
b. Carbon monoxide and nitrogen
c. Carbon monoxide and hydrogen
d. Carbon dioxide and nitrogen
Answer- Carbon monoxide and hydrogen
Que- In electro-refining, the pure metal is deposited on
a. Vessel
b. Electrolyte
c. Cathode
d. Anode
Answer- Cathode
Que- Which of the following electrodes is used in strongly alkaline solution?
a. Mercury - mercuric oxide electrode
b. Mercury - mercurous sulphate electrode
c. Mercury - mercurous chloride electrode
d. Silver - silver chloride electrode
Answer- Mercury - mercuric oxide electrode
Que- The laws of electrolysis are given by
a. Ostwald
b. Faraday
c. Arrhenius
d. Lewis
Answer- Faraday
Que- Global warming may result in
a. Flood
b. Cyclone
c. Decrease in forest productivity
d. All of the above
Answer- All of the above
Que- Oxygen which is vital for life is a product of photosynthesis and comes from
a. Carbonates from soil
b. Carbon dioxide
c. Water
d. Oxides of mineral elements
Answer- Water
Que- Which one of the following is a greenhouse gas ?
a. Nitrogen
b. Helium
c. Carbon dioxide
d. Sulphur dioxide
Answer- Carbon dioxide
Que- Acid rain is caused by the pollution of environment by
a. Carbon monoxide and Carbon dioxide
b. Ozone and Carbon dioxide
c. Nitrous oxide and Sulphur dioxide
d. Carbon dioxide and Nitrogen
Answer- Nitrous oxide and Sulphur dioxide
Que- The ‘Green House effect’ is produced due to the presence of excess amount of
a. Sulphur dioxide
b. Nitrogen dioxide
c. Carbon monoxide
d. Methane
Answer- Methane
Que- Which one is the most reactive gaseous element?
a. Chlorine
b. Bromine
c. Iodine
d. Flourine
Answer- Flourine
Que- Which of the following metals occurs in free state ?
a. Copper
b. Iron
c. Zinc
d. Lead
Answer- Lead
Que- The “King of Metals” is :
a. Gold
b. Silver
c. Iron
d. Aluminium
Answer- Gold
Que- Which of the following metals is used in Space Crafts to withstand high temperatures ?
a. Fe
b. Ti
c. Ni
d. Pb
Answer- Ti
Que- Phosphorus is kept in water because
a. Its ignition temperature is very high
b. Its ignition temperature is very low
c. Its critical temperature is high
d. Its critical temperature is low
Answer- Its ignition temperature is very low
Que- Most commonly used bleaching agent is
a. Sodium chloride
b. Alcohol
c. Carbon dioxide
d. Chlorine
Answer- Chlorine
Que- The acid which is secreted by the glands in the stomach wall is
a. Sulphuric acid
b. Hydrochloric acid
c. Nitric acid
d. Phosphoric acid
Answer- Nitric acid
Que- Hydrochloric acid is also known as
a. Galic acid
b. Picric acid
c. Muriatic acid
d. Chloric acid
Answer- Muriatic acid
Que- Heating of a ore below its melting point in the absence of air is known as
a. Refining
b. Calcination
c. Roasting
d. Smelting
Answer- Calcination
Que- Stainless steel is usually made by alloying the steel with
a. Copper and nickel
b. Copper and chromium
c. Chromium and nickel
d. Manganese and copper
Answer- Chromium and nickel
Que- Which one of the following mineral does not contain oxygen ?
a. Haematite
b. Bauxite
c. Cryolite
d. Calcite
Answer- Cryolite
Que- Which mineral is the ore of aluminium ?
a. Haematite
b. Bauxite
c. Magnetite
d. Siderite
Answer- Bauxite
Que- Which of the following is a metallic ore ?
a. Mica
b. Quartz
c. Feldspar
d. Galena
Answer- Galena
Que- Magnalium is an alloy of
a. Aluminium and Magnesium
b. Magnesium and Tin
c. Aluminium and Zinc
d. Manganese and Magnesium
Answer- Aluminium and Magnesium
Que- Magnetite is
a. Fe2O3
b. Fe3O4
c. FeCO3
d. 2Fe2O3. 3H2O
Answer- Fe3O4
Que- Atomic number of an atom gives the number of which of the following ?
a. Electrons
b. Protons
c. Neutrons
d. Neutrons and protons
Answer- Protons
Que- The chemical bahaviour of an atom depends upon
a. The number of protons in its nucleus
b. The number of neutrons in the nucleus
c. The number of electrons orbiting around the nucleus
d. The number of nucleons in the nucleus
Answer- The number of electrons orbiting around the nucleus
Que- Which one of the following has a maximum tendency to form M3 ion ?
a. N
b. Bi
c. P
d. As
Answer- N
Que- A matured mammalian cell without nucleus is
a. Lymphocyte
b. Erythrocyte
c. Spermatozoan
d. Oocyte
Answer- Erythrocyte
Que- Which of the following metals can displace copper from copper sulphate solution ?
a. Platinum
b. Mercury
c. Iron
d. Gold
Answer- Iron
Que- Which type of radiations are absorbed by the upper layer of the atmosphere?
a. Radio-waves
b. Infrared
c. Visible
d. Ultraviolet
Answer- Ultraviolet
Que- Sulphur dioxide level in the atmosphere can be reduced by using
a. More efficient car engines
b. Catalytic converters in industry
c. Static electricity to attract it in factory chimneys
d. Low - sulphur fuels
Answer- Low - sulphur fuels
Que- The term 'brown air' is used for
a. Acid fumes
b. Photochemical smog
c. Sulphurous smog
d. Industrial smog
Answer- Photochemical smog
Que- The sewage obtained from water closets and urinals is known as
a. Sanitary waste
b. Industrial waste
c. Garbage
d. Sullage
Answer- Sanitary waste
Que- Which one amongst the following is not a Green House gas?
a. Nitrogen
b. Carbon dioxide
c. Carbon Monoxide
d. Chloro fluoro carbons
Answer- Nitrogen
Que- Main pollutant present in automobile exhaust is
a. CO
b. CO2
c. NO
d. Hydrocarbons
Answer- CO
Que- The liquid waste from kitchens and baths, of residences is known as :
a. Domestic sewage
b. Storm water
c. Sullage
d. Refuse
Answer- Sullage
Que- Most poisonous pollutant in water is
a. Zinc
b. Phosphate
c. Arsenic
d. Detergent
Answer- Arsenic