Que- Which one is heaviest naturally occurring element of the periodic element?
a. Iron
b. Thorium
c. Rhodium
d. Uranium
Answer- Uranium
Que- Activated Charcoal is used to remove colouring matter from pure substances by
a. Bleaching
b. Oxidation
c. Adsorption
d. Reduction
Answer- Adsorption
Que- The molecular mass of a gas is
a. Twice its vapour pressure
b. Equal to its vapour pressure
c. Half its vapour pressure
d. Not related to its vapour pressure
Answer- Twice its vapour pressure
Que- The value of gas constant R in Ergs deg–1 mole–1 is
a. 8.314 × 107
b. 8.341 × 107
c. 8.413 × 107
d. 4.183 × 107
Answer- 8.314 × 107
Que- The absolute temperature of a gas is doubled and the pressure is reduced to half, the volume of the gas
a. Remains unchanged
b. Will be doubled
c. Will increase four-fold
d. Will be reduced to half
Answer- Will increase four-fold
Que- Isobars are lines joining places having equal
a. Rainfall
b. Pressure
c. Population
d. Height above sea-level
Answer- Pressure
Que- Which of the following could be used as fuel in propellant or rockets ?
a. Liquid Hydrogen + Liquid Nitrogen
b. Liquid Oxygen + Liquid Argon
c. Liquid Nitrogen + Liquid Oxygen
d. Liquid Hydrogen + Liquid Oxygen
Answer- Liquid Hydrogen + Liquid Oxygen
Que- Which gas is used for converting vegetable oils into saturated fats ?
a. H2
b. O2
c. Cl2
d. SO2
Answer- H2
Que- Which of the following gases will effuse out of football bladder most quickly ?
a. He
b. H2
c. N2
d. O2
Answer- H2
Que- The property of hydrogen which distinguishes it from alkali metals is
a. Its electropositive character
b. Its affinity for non-metal
c. Its reducing character
d. Its non-metallic character
Answer- Its non-metallic character
Que- Hydrogen is not found in atmosphere because
a. It is highly inflammable
b. It is the lightest gas
c. It is absorbed by plants
d. It immediately combines with oxygen to form water
Answer- It is the lightest gas
Que- Which among the following is used as a catalyst in the production of high octane fuels?
a. HNO3
b. H2SO4
c. HCl
d. HF
Answer- H2SO4
Que- Catalytic converters are generally made from :
a. Alkaline metals
b. Hydrogen
c. Transition metals
d. Carbon
Answer- Transition metals
Que- Which of the following is colourless?
a. Chlorine
b. Oxygen
c. Phosphorus
d. Sulphur
Answer- Oxygen
Que- Iodine value is used to estimate
a. Hydroxyl groups in oil
b. Alkali content in oil
c. Unsaturation in oil
d. Carboxylic groups in oil
Answer- Unsaturation in oil
Que- The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is
a. Xenon
b. Krypton
c. Argon
d. Helium
Answer- Helium
Que- Ozone layer of atmosphere absorbs:
a. Ultraviolet rays
b. Infra-red rays
c. All radiations of Light
d. Cosmic rays.
Answer- Ultraviolet rays
Que- Air shows the property of
a. N2
b. O2
c. Both A and B
d. None of these
Answer- Both A and B
Que- The most abundant constituent of atmospheric air is :
a. Carbon
b. Hydrogen
c. Oxygen
d. Nitrogen
Answer- Nitrogen
Que- The percentage of oxygen in air is approximately
a. 100%
b. 1%
c. 78%
d. 21%
Answer- 21%
Que- The major constituent of air is
a. Nitrogen
b. Carbon dioxide
c. Oxygen
d. Hydrogen
Answer- Nitrogen
Que- Seaweeds are important source of
a. Iron
b. Chlorine
c. Bromine
d. Iodine
Answer- Iodine
Que- Sea weeds are important source of
a. Fluorine
b. Chlorine
c. Bromine
d. Iodine
Answer- Iodine
Que- The strongest oxidizing agent among the following is:
a. Chlorine
b. Iodine
c. Fluorine
d. Oxygen
Answer- Fluorine
Que- Helium is added to the oxygen supply of deep sea divers because it is
a. Less poisonous than nitrogen
b. Lighter than nitrogen
c. Readily miscible with oxygen
d. Less soluble in blood than nitrogen at high pressure
Answer- Less soluble in blood than nitrogen at high pressure
Que- Vulcanization of rubber is carried out by adding
a. Sulphur
b. Carbon
c. Ozone
d. Phosphorus
Answer- Sulphur
Que- Ozone consists of
a. Oxygen only
b. Oxygen and Nitrogen
c. Hydrogen and Carbon
d. Oxygen and Carbon
Answer- Oxygen only
Que- Ozone layer is present in
a. Troposphere
b. Ionosphere
c. Stratosphere
d. Exosphere
Answer- Stratosphere
Que- 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
Answer- Checking the penetration of ultraviolet rays to the earth
Que- The major use of sulphur is in the manufacture of
a. H2SO4
b. H2S
c. SO2
d. Fungicide
Answer- H2SO4
Que- Percentage of lead in lead pencils is
a. 0
b. 31-66
c. 40
d. 80
Answer- 0
Que- Mark the compound which possess ionic, covalent and coordinate bonds.
a. NH4Cl
b. SO3
c. SO2
d. H2O
Answer- NH4Cl
Que- The most commonly used chemicals in the artificial rainmaking or cloud seeding are
a. Silver Iodide (AgI)
b. Sodium Chloride (NaCl)
c. Dry Ice (Frozen CO2)
d. All of the above
Answer- Silver Iodide (AgI)
Que- Malathion is a/an
a. Insecticide
b. Fumigant
c. Preservative
d. Pesticide
Answer- Insecticide
Que- The chemical name of rat poison is
a. Zinc oxide
b. Potassium cyanide
c. Lead nitrate
d. Zinc phosphide
Answer- Zinc phosphide
Que- Which of the toxic heavy metals is found in modern tannery industries ?
a. Nickel
b. Zinc
c. Chromium
d. Lead
Answer- Chromium
Que- The antiseptic compound present in dettol is
a. Iodine
b. chloroxylenol
c. Biothional
d. Cresol
Answer- chloroxylenol
Que- Cement is usually a mixture of :
a. Calcium silicate and calcium aluminate
b. Calcium silicate and calcium ferrate
c. Calcium aluminate and calcium ferrate
d. Lime stone and silicon dioxide
Answer- Calcium silicate and calcium aluminate
Que- Sodium bicarbonate is commercially known as
a. Washing soda
b. Baking soda
c. Caustic soda
d. Soda lime
Answer- Baking soda
Que- Which of the following is the main nitrogenous waste in humans ?
a. Ammonia
b. Urea
c. Uric Acid
d. Ammonium Nitrate
Answer- Uric Acid
Que- Quartz is a crystalline form of
a. Alumina
b. Glass
c. Silica
d. Limestone
Answer- Silica
Que- Urea is a
a. Sodium fertilizer
b. Phosphatic fertilizer
c. Nitrogenous fertilizer
d. Potassium fertilizer
Answer- Nitrogenous fertilizer
Que- Removal of carbon particles from air involves the principle of
a. Precipitation
b. Filteration
c. Electrophoresis
d. Sedimentation
Answer- Electrophoresis
Que- Physico-chemical characteristics of water in water sources undergo changes due to
a. Aquatic macrophytes
b. Auatic fungi
c. Effluents
d. Evapotranspiration
Answer- Effluents
Que- Sulphur dioxide present in the industrial chimney exhaust causes
a. Respiratory and lung disease
b. Reduction in plant's productivity owing to acid rain
c. Corrosion building materials
d. All of the above
Answer- All of the above
Que- Coating of solid waste with impervious material is known as
a. Encapsulation
b. Chemical fixation
c. Landfill
d. Capping
Answer- Encapsulation
Que- Taj Mahal is greatly affected due to :
a. Tourists
b. Acid rain
c. Deforestation
d. Sound pollution
Answer- Acid rain
Que- Froth floatation process to concentrate the minerals is applicable to
a. Calamine
b. Chalcopyrites
c. Bauxite
d. Haematite
Answer- Chalcopyrites
Que- Chemical name of Gammaxane is
a. Toluene
b. Chloro benzene
c. Aniline
d. Benzene hexachloride
Answer- Chloro benzene
Que- Epsom salt is used
a. As purgative
b. In softening water
c. In paper industry
d. In making tooth paste
Answer- As purgative
Que- The metal extracted from Bauxite is :
a. Silver
b. Copper
c. Manganese
d. Aluminium
Answer- Aluminium
Que- Among the following iron ores, the highest percentage of iron content is found in–
a. Haemetite
b. Magnetite
c. Limnonite
d. None of these
Answer- Haemetite
Que- Natural rubber is the polymer of :
a. Isoprene
b. Styrene
c. Butadiene
d. Ethylene
Answer- Isoprene
Que- The basic chemical building block of natural rubber obtained from trees is
a. Isoprene
b. Vinyl Chloride
c. Acetylene
d. Neoprene
Answer- Isoprene
Que- The name of plastic polymer from which combs, toys, bowls etc., can be made, is
a. Polyurethane
b. Polystyrene
c. Metallic polysulphides
d. Teflon
Answer- Polystyrene
Que- A polymeric substance used to make parachute is
a. Rayon
b. Viscose
c. Cotton
d. Terylene
Answer- Viscose
Que- PVC is obtained by the polymerisation of
a. Propane
b. Vinyl chloride
c. Styrene
d. Acetylene
Answer- Vinyl chloride
Que- Water cycle refers to
a. An integrated attempt to recycle water in relatively arid regions
b. Constant movement of water from ocean to land and back to ocean once again
c. Scientific management of water in areas excessively plagued with water-logging
d. Water distribution in relatively dry areas
Answer- Constant movement of water from ocean to land and back to ocean once again
Que- Permanent hardness of water may be removed by addition of
a. Alum
b. Sodium carbonate
c. Lime
d. Potassium Permangante
Answer- Sodium carbonate
Que- Acid rain is caused due to pollution of atmosphere by
a. Oxides of carbon and nitrogen
b. Oxides of nitrogen and sulphur
c. Oxides of nitrogen and phosphorous
d. None of these
Answer- Oxides of nitrogen and sulphur
Que- What are the components responsible for acid rain?
a. Nitrogen monoxide (NO) and Carbon monoxide (CO)
b. Sulphur dioxide (SO2) and Nitrogen oxides (NOx)
c. Carbon dioxide (CO2) and Carbon monoxide (CO)
d. Oxides of carbon (COx) and Oxides of nitrogen (NOx)
Answer- Sulphur dioxide (SO2) and Nitrogen oxides (NOx)
Que- Which gas emitted by power stations causes acid rain?
a. Carbon dioxide
b. Sulphur dioxide
c. Helium
d. Nitrogen
Answer- Sulphur dioxide
Que- Which of the following is very reactive and kept in kerosene?
a. Sodium
b. Potassium
c. Iodine
d. Bromine
Answer- Sodium
Que- Which metal does not undergo corrosion due to the formation of oxide layer?
a. Copper
b. Iron
c. Aluminium
d. Zinc
Answer- Aluminium
Que- The wire of flash bulb is made of:
a. Copper
b. Barium
c. Magnesium
d. Silver
Answer- Magnesium
Que- Identify the metal which is non toxic in nature.
a. Chromium
b. Gold
c. Cadmium
d. Cobalt
Answer- Gold
Que- Iron rusts quickly in
a. Rain water
b. Sea water
c. Distilled water
d. River water
Answer- Sea water
Que- Which substance is used to retard the setting action of cement?
a. CaO
b. Al2O3
c. CaSO4.2H2O
d. Na2O + K2O
Answer- CaSO4.2H2O
Que- Stalactites and Stalagmites form due to the precipitation of :
a. CaCO3
b. CaCl2
c. MgCl2
d. MgCO3
Answer- CaCO3
Que- Which of the following is not a precious/semi-precious stone?
a. Sapphire
b. Ruby
c. Pearl
d. Emerald
Answer- Pearl
Que- The chemical substance present in bones and teeth is
a. Calcium phosphate
b. Calcium chloride
c. Calcium sulphate
d. Calcium borate
Answer- Calcium phosphate
Que- The chemical substance present in bones and teeth is
a. Calcium phosphate
b. Calcium chloride
c. Calcium sulphate
d. Calcium borate
Answer- Calcium phosphate
Que- In sugar solution,
a. Sugar is solute, water is solvent
b. Sugar is solvent, water is solute
c. Both are solutes
d. Both are solvents
Answer- Sugar is solute, water is solvent
Que- The metallic constituents of hard water are :
a. Magnesium, calcium and tin
b. Iron, tin and calcium
c. Calcium, magnesium and iron
d. Magnesium, tin and iron
Answer- Calcium, magnesium and iron
Que- Potassium Permanganate is used for purifying drinking water, because________
a. It is a reducing agent
b. It is an oxidising agent
c. It is a sterilising agent
d. It dissolves the impurities of water
Answer- It is an oxidising agent
Que- Lead in water can cause
a. Eye disease
b. Arthritis
c. Kidney damage
d. Hair falling
Answer- Kidney damage
Que- Hardness of the water is commonly measured in terms of
a. Calcium carbonate equivalents
b. Calcium sulphate equivalents
c. Magnesium carbonate equivalents
d. Magnesium sulphate equivalents
Answer- Calcium carbonate equivalents
Que- The chief source of naphthalene is
a. Coal-tar
b. Diesel
c. Charcoal
d. Camphor
Answer- Coal-tar
Que- The gas that usually causes explosions in coal mines is
a. Hydrogen
b. Carbon monoxide
c. Air
d. Methane
Answer- Methane
Que- Submarines move under water. They have engines that run on
a. Petrol and oxygen
b. Diesel
c. Batteries
d. Steam
Answer- Diesel
Que- Which is the highest quality of hard coal?
a. Anthracite
b. Bituminous
c. Lignite
d. Peat
Answer- Anthracite
Que- The main source of Naphthalene is
a. Charcoal
b. Camphor
c. Coal-tar
d. Diesel
Answer- Coal-tar
Que- In arc welding, Argon is used because of its
a. Low reactivity with metal
b. Ability to lower the melting point of the metal
c. High flammability
d. High calorific value
Answer- Low reactivity with metal
Que- An inert gas mixed with oxygen given to patients suffering from restricted breathing is
a. Helium
b. Krypton
c. Radon
d. Argon
Answer- Helium
Que- Which of the following elements is obtained from seaweeds ?
a. Iodine
b. Vanadium
c. Argon
d. Sulphur
Answer- Iodine
Que- Silica gel is a
a. Moisturizer
b. Flavouring agent
c. Drying agent
d. Delicious food
Answer- Drying agent
Que- Silicon is a
a. Semiconductor
b. Insulator
c. Non-conductor
d. Conductor
Answer- Semiconductor
Que- The degree of dissociation of an electrolyte depends on
a. Dilution
b. Impurities
c. Atmospheric pressure
d. Method of dissolution
Answer- Dilution
Que- In the electroplating of gold, the electrolyte used is
a. Gold chloride
b. Gold nitrate
c. Gold sulphate
d. Potassium aurocyanide
Answer- Gold sulphate
Que- The deterioration of a metal by an electrochemical process is commonly termed as
a. Erosion
b. Corrosion
c. Passivation
d. Abrasion
Answer- Corrosion
Que- Aqueous solution of which of the following is a good conductor of electricity
a. Ammonium acetate
b. Glucose
c. Ammonia
d. Acetic acid
Answer- Ammonium acetate
Que- The cathode of a lead storage battery is made up of
a. Zinc
b. Lead
c. Lead oxide
d. Manganese dioxide
Answer- Lead
Que- Oxide of sulphur present in the atmosphere are washed down by rains to cause :
a. Depletion of fossil fuel reserves
b. Eutrophication in lakes
c. Lowering of pH of soil
d. Industrial smog formation
Answer- Depletion of fossil fuel reserves
Que- Supersonic jet causes pollution by thinning of
a. O3 layer
b. O4 layer
c. SO2 layer
d. CO2 layer
Answer- O3 layer
Que- The pollutant responsible for ozone holes is ________
a. CO2
b. SO2
c. CO
d. CFC
Answer- CFC
Que- Major gaseous pollutant of the thermal power station is
a. H2 S
b. NH3
c. NO2
d. SO2
Answer- SO2
Que- The gas causing acid rain in an industrial area is
a. Carbon dioxide
b. Carbon monoxide
c. Sulphur dioxide
d. Methane
Answer- Sulphur dioxide
Que- Sea water can be purified by the process of
a. Distillation
b. Evaporation
c. Filtration
d. Fractional distillation
Answer- Distillation
Que- A mixture of water and alcohol can be separated by
a. Filtration
b. Evaporation
c. Decantation
d. Distillation
Answer- Distillation
Que- Which one is a naturally occuring noble gas?
a. Sodium
b. Potassium
c. Argon
d. Boron
Answer- Argon