Que- Which of the following can be found as pollutants in the drinking water in some parts of India? Select the correct answer using the code given below.(A) Arsenic (B) Sorbitol (C) Fluoride (D) Formaldehyde (E) Uranium
a. B, D and E
b. A, B, C, D and E
c. A, C and E
d. A and C
Answer- A, C and E
Que- Smog is
a. Nothing but black smoke
b. A combination of smoke and fog
c. A liquid particle resulting from vapour condensation
d. A solid particle, e.g., fllyash
Answer- A combination of smoke and fog
Que- Asbestos is formed of :
a. Calcium and Magnesium
b. Copper, Zinc and Manganese
c. Lead and Iron
d. Calcium and Zinc
Answer- Calcium and Magnesium
Que- Bayer's reagent is
a. Alkaline potassium permanganate
b. Acidified potassium permanganate
c. Hydrogen peroxide
d. Bromine water
Answer- Alkaline potassium permanganate
Que- Bone ash contains
a. Calcium sulphate
b. Phosphoric sulphate
c. Calcium phosphate
d. Calcium hypophosphate
Answer- Calcium phosphate
Que- Cement is made hard with
a. Dehydration
b. Hydration and dissociation of water
c. Dissociation of water
d. Polymerisation
Answer- Hydration and dissociation of water
Que- 'Plaster of Paris' is made by partial dehydration of
a. Epsom salt
b. Gypsum salt
c. Blue vitriol
d. Green vitriol
Answer- Gypsum salt
Que- Chemical name of common salt is
a. Sodium Chloride
b. Sodium Bicarbonate
c. Sodium
d. Sodium Oxide
Answer- Sodium Chloride
Que- Nitrogen forms a variety of compounds in all oxidation states ranging from
a. –3 to +5
b. –3 to +3
c. –3 to +4
d. –3 to +6
Answer- –3 to +5
Que- What is the covalency of nitrogen in ammonia molecule
a. 2
b. 3
c. 4
d. 5
Answer- 3
Que- What is 'milk of magnesia' chemically?
a. Magnesium carbonate
b. Sodium bicarbonate
c. Calcium hydroxide
d. Magnesium hydroxide
Answer- Magnesium hydroxide
Que- Which one of the following is a micro-element ?
a. Chlorine
b. Hydrogen
c. Nitrogen
d. Oxygen
Answer- Chlorine
Que- When lime juice is dropped on baking soda, brisk effervescence takes place because the gas evolved is
a. Hydrogen
b. Oxygen
c. Carbon dioxide
d. All of them
Answer- Carbon dioxide
Que- Which of the following is used as filler in tyre of rubber ?
a. Carbon black
b. Coal
c. Coke
d. Graphite
Answer- Carbon black
Que- The open ""Sigrees"" or coal stoves often require fanning to sustain burning because of
a. Tendency of carbon dioxide to form a layer along with dust smoke
b. Lack of oxygen in the surroundings of sigrees
c. Accumulation of smoke and dust over the sigrees
d. Interrupted release of moisture from the material
Answer- Tendency of carbon dioxide to form a layer along with dust smoke
Que- 24 carat of diamond is equal to
a. 200 mg
b. 200 g
c. 95% mg
d. 91% gold
Answer- 200 mg
Que- 1 carat of diamond is equal to
a. 200 mg
b. 200 g
c. 100 mg
d. 100 g
Answer- 200 mg
Que- The metal ion present in Vitamin B12 is
a. Nickel
b. Cobalt
c. Iron
d. Zinc
Answer- Cobalt
Que- The metal present in vitamin B12 is
a. Fe
b. Co
c. Mg
d. Mo
Answer- Co
Que- Which of the following is not present in RNA
a. Thymine
b. Uracil
c. Ribose
d. Phosphate
Answer- Thymine
Que- The enzyme that converts glucose to ethyl alcohol is :
a. Invertase
b. Maltase
c. Zymase
d. Diastase
Answer- Zymase
Que- The fat of a common mussel-secretes a sticky glue that can be used to make heart implants. The unique chemical compound present in the glue is:
a. Amino phenyl alanine
b. Hydroxy phenyl alanine
c. Phenyl alanine
d. Dihydroxy phenyl alanine
Answer- Dihydroxy phenyl alanine
Que- Freon used as refrigerant is chemically
a. Chlorinated hydrocarbon
b. Fluorinated hydrocarbon
c. Chlorofluoro hydrocarbon
d. Fluorinated aromatic compound
Answer- Chlorofluoro hydrocarbon
Que- The gas used for artificial fruit ripening of green fruit is
a. Ethylene
b. Acetylene
c. Ethane
d. Methane
Answer- Ethylene
Que- Which one of the following vegetable oils is used in the manufacture of paints?
a. Palm oil
b. Sunflower oil
c. Linseed oil
d. Cottonseed oil
Answer- Linseed oil
Que- KMnO4 can be used as
a. Insecticide
b. Fertilizer
c. Pesticide
d. Disinfectant
Answer- Disinfectant
Que- A detergent is a
a. Cleansing agent
b. Drug
c. Catalyst
d. Soap
Answer- Cleansing agent
Que- Oxygen has (+) oxidation number only in
a. OF2
b. C12O
c. H2O (2)
d. N2O
Answer- OF2
Que- The oxidation number of nickel in K4[Ni(CN)4] is
a. Zero
b. +4
c. –4
d. +8
Answer- Zero
Que- How many neutrons are there in 92U238 atom ?
a. 92
b. 238
c. 146
d. 330
Answer- 146
Que- The number of neutrons present in an element having mass number 226 and atomic number 88 is :
a. 88
b. 138
c. 314
d. 50
Answer- 138
Que- Who modified Bohr's theory by introducing elliptical orbits for electron path?
a. Hund
b. Thomson
c. Rutherford
d. Sommerfeld
Answer- Sommerfeld
Que- Which of the following is the petroleum wax ?
a. Bees wax
b. Carnauba wax
c. Paraffin wax
d. Jojoba wax
Answer- Paraffin wax
Que- The hottest part of the gas flame is known as
a. Blue zone
b. Non-luminous zone
c. Luminous zone
d. Dark zone
Answer- Luminous zone
Que- Water is not effective in extinguishing a fire caused by petrol because
a. The flame is too hot for water to cool it down
b. Water and petrol react chemically
c. Water and petrol are miscible with each other
d. Water and petrol are immiscible with each other and petrol which forms the upper layer continues to burn
Answer- Water and petrol are immiscible with each other and petrol which forms the upper layer continues to burn
Que- The temperature of oxy-acetylene flame is around
a. 2800°C
b. 3200°C
c. 3600°C
d. 4000°C
Answer- 4000°C
Que- Helium gas is used in gas balloons instead of hydrogen gas because it is
a. Lighter than hydrogen
b. More abundant than hydrogen
c. Non-combustible
d. More stable
Answer- Non-combustible
Que- Which acid is used in Lead storage battery?
a. Sulphuric acid
b. Nitric acid
c. Hydrochloric acid
d. Acetic acid
Answer- Sulphuric acid
Que- The acid used in lead storage cells is
a. Phosphoric acid
b. Hydrochloric acid
c. Nitric acid
d. Sulphuric acid
Answer- Sulphuric acid
Que- The acid used in lead storage cells is
a. Phosphoric acid
b. Hydrochloric acid
c. Nitric acid
d. Sulphuric acid
Answer- Sulphuric acid
Que- 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
Answer- Lactic acid
Que- The compound used in prickly heat powder to prevent excessive sweating is
a. Boric acid
b. Phosphoric acid
c. Carbonic acid
d. Sulphuric acid
Answer- Boric acid
Que- The constituents of automobile exhaust that can cause cancer is/are :
a. Oxides of nitrogen
b. Carbon monoxide
c. Polycyclic hydrocarbons
d. Lead
Answer- Lead
Que- The acid rain destroys vegetations because it contains
a. Nitric acid
b. Ozone
c. Carbon monoxide
d. Sulphuric acid
Answer- Sulphuric acid
Que- Of the following, which one pollutes the air of a big city ?
a. Copper
b. Chromium
c. Lead
d. Cadmium
Answer- Lead
Que- Of the following which one pollutes the air of a big city ?
a. Copper
b. Chromium
c. Lead
d. Calcium
Answer- Lead
Que- Which of the following is usually not an air-pollutant?
a. Hydrocarbons
b. Sulphur dioxide
c. Carbon dioxide
d. Nitrous oxide
Answer- Nitrous oxide
Que- The function of skimming tank in sewage treatment is to remove
a. Oil and fatty substances
b. Suspended solids
c. Gritty substances
d. Inorganic substances
Answer- Oil and fatty substances
Que- Acid rain is caused due to emission of which of the following into the atmosphere ?
a. Oxides of nitrogen and sulphur
b. Carbon dioxide and carbon monoxide
c. Ozone and carbon dioxide
d. Carbon monoxide and nitrogen
Answer- Oxides of nitrogen and sulphur
Que- The depletion of Ozone layer is mainly due to
a. Volcanic eruptions
b. Aviation fuels
c. Radioactive rays
d. Chlorofluorocarbons
Answer- Chlorofluorocarbons
Que- Chemical name of vinegar is
a. Acetone
b. Acetic acid
c. Formaldehyde
d. Ethanol
Answer- Acetic acid
Que- Which one of the following organic compounds has fruity smell?
a. Alcohol
b. Aldehyde
c. Ester
d. Ether
Answer- Ester
Que- The Latin word formica means ant. The name formic acid is derived from this Latin word because
a. this acid, in ancient times, was used to eliminate ant-hills
b. this corrosive acid is secreted by ants to drive away their enemies
c. this acid was first obtained by the distillation of ants
d. ants are attracted by the odour of this acid
Answer- this acid was first obtained by the distillation of ants
Que- The ore which is found in abundance in India is
a. monazite
b. fluorspar
c. bauxite
d. magnetite
Answer- monazite
Que- The inherited traits of an organism are controlled by
a. RNA molecules
b. nucleotides
c. DNA molecules
d. enzymes
Answer- DNA molecules
Que- The heat energy produced when the human body metabolises 1 gram of fat is
a. 30 KJ
b. 1 KJ
c. 39 KJ
d. 29 KJ
Answer- 39 KJ
Que- What are the number of moles of CO2 which contains 16 g of oxygen?
a. 0.5 mole
b. 0.2 mole
c. 0.4 mole
d. 0.25 mole
Answer- 0.5 mole
Que- Which type of fire extinguisher is used for petroleum fire ?
a. Foam type
b. Soda acid type
c. Powder type
d. None of these
Answer- Foam type
Que- Man dies in the atmosphere of CO, because it
a. Dries up the blood
b. Combines with O2 present in the body
c. Reduces the organic matter of tissues
d. Combines with the haemoglobin of blood, thereby making the later incapable of absorbing O2
Answer- Combines with the haemoglobin of blood, thereby making the later incapable of absorbing O2
Que- It is dangerous to leave the car engine running in a closed garage, because it may cause serious pollution due to poisoning by emission of
a. CO2
b. CO
c. Unburnt petrol
d. SO2
Answer- CO
Que- Which gas is used as fire extinguisher ?
a. Carbon dioxide
b. Carbon monoxide
c. Carbon suboxide
d. Sulphur dioxide
Answer- Carbon dioxide
Que- The process which does not evolve CO2 in air is
a. Burning
b. Breathing
c. Organic delay
d. Photosynthesis
Answer- Photosynthesis
Que- Galvanization is the :
a. Deposition of zinc on iron
b. Deposition of tin on iron
c. Deposition of copper on iron
d. Deposition of aluminium on iron
Answer- Deposition of zinc on iron
Que- Which one of the following metals is used to galvanise iron ?
a. Copper
b. Lead
c. Zinc
d. Mercury
Answer- Zinc
Que- A non-electronic conductor is
a. Iron
b. Gas Carbon
c. Copper Sulphate
d. None of these
Answer- None of these
Que- The anode of a dry cell is made up of
a. Iron
b. Cadmium
c. Zinc
d. Lead
Answer- Zinc
Que- The coating of a thin layer of zinc on steel or iron objects is known as
a. Hot dipping
b. Tinning
c. Galvanising
d. Electroplating
Answer- Galvanising
Que- Element 106 was discovered by
a. Rutherford
b. Seaborg
c. Lawrence
d. Kurchatove
Answer- Seaborg
Que- The gas used for filling weather balloons is
a. Helium
b. Hydrogen
c. Air
d. Nitrogen
Answer- Helium
Que- The most abundant element is
a. Calcium
b. Silicon
c. Oxygen
d. Nitrogen
Answer- Oxygen
Que- A balloon filled with helium rises in air because
a. Air exerts an upward force on the balloon
b. The balloon is weightless
c. Helium is less dense than air
d. Helium pushes down on the air below the balloon
Answer- Helium is less dense than air
Que- Which one of the following is also known as solution ?
a. A compound
b. A homogeneous mixture
c. A heterogeneous mixture
d. A suspension
Answer- A homogeneous mixture
Que- A powerful eye irritant present in smog is
a. Nitric oxide
b. Sulphur dioxide
c. Peroxyacetyl nitrate
d. Carbon dioxide
Answer- Peroxyacetyl nitrate
Que- Which of the following is not a natural source of air pollution ?
a. Volcanic eruptions and lightening discharge
b. Biological decay of vegetable matter
c. Photochemical oxidation of organic number
d. None of the above
Answer- None of the above
Que- CNG used in automobiles to check pollution, mainly consists of
a. CH4
b. CO2
c. N2
d. H2
Answer- CH4
Que- What are the major pollutants of cigarette smoke?
a. Carbon monoxide and dioxin
b. Carbon monoxide and nicotine
c. Carbon monoxide and benzene
d. Dioxin and benzene
Answer- Carbon monoxide and nicotine
Que- Which of the following metals is not a pollutant ?
a. Mercury
b. Arsenic
c. Lead
d. Aluminium
Answer- Aluminium
Que- The first metal used by a man was
a. Copper
b. Silver
c. Bronze
d. Brass
Answer- Copper
Que- White phosphorus is generally kept under
a. Alcohol
b. Water
c. Glycerine
d. Kerosene oil
Answer- Water
Que- Which metal is extracted from sea water?
a. Potassium
b. Magnesium
c. Aluminium
d. Beryllium
Answer- Magnesium
Que- The rusting of iron is a/an
a. Physical change
b. Electrochemical change
c. Electrical change
d. None of the above
Answer- Electrochemical change
Que- When iron rusts, its weight
a. Decreases
b. Increases
c. Remains the same
d. First increases and then decreases
Answer- Increases
Que- Highly toxic gas which causes headache, visual difficulty, paralysis and even death is
a. CO2
b. O3
c. CO
d. All of these
Answer- CO
Que- Water gas is the combination of
a. CO and H2
b. CO2and H2
c. CO and H2O
d. CO2 and CO
Answer- CO and H2
Que- The gas that causes suffocation and death when coal or coke is burnt in a closed room is
a. Methane
b. Ethane
c. Carbon monoxide
d. Carbon dioxide
Answer- Carbon monoxide
Que- Which one is not a pure form of carbon?
a. Coal
b. Graphite
c. Diamond
d. Gold
Answer- Gold
Que- Which one is the purest form of carbon?
a. Coal
b. Graphite
c. Diamond
d. Iron
Answer- Diamond
Que- For a spontaneous chemical process, the free energy change is
a. Positive
b. Negative
c. Zero
d. Depends on whether the reaction is exothermic or endothermic
Answer- Negative
Que- When a bond is formed between two atoms, the energy of the system will
a. Increase
b. Decrease
c. Remain the same
d. May increase or decrease
Answer- Remain the same
Que- The minimum energy required for an effective collision is
a. Threshold energy
b. Activation energy
c. Free energy
d. Internal energy
Answer- Activation energy
Que- Which of the following produces highest amount of energy upon oxidation?
a. Protein
b. Fat
c. Glucose
d. An alkane
Answer- Fat
Que- Which of the following has least negative electron gain enthalpy?
a. P
b. S
c. Cl
d. F
Answer- P
Que- The increasing abundance of green house gases in atmosphere has led to the following effect except
a. Global warming
b. Depletion of ozone layer in the stratosphere
c. Oxygen fertilization effect
d. Carbon dioxide ferilization effect
Answer- Oxygen fertilization effect
Que- The source of energy that causes the least global warming is
a. Coal
b. Geothermal energy
c. Natural Gas
d. Petroleum
Answer- Geothermal energy
Que- Which of the following fuels causes minimum environmental pollution?
a. Diesel
b. Kerosene
c. Hydrogen
d. Coal
Answer- Hydrogen
Que- Biofertilizers convert nitrogen to ________ .
a. Nitrates
b. Ammonia
c. Nitrogenase
d. Amino acids
Answer- Ammonia
Que- The elements in the modern Periodic table are arranged according to their
a. Mass number
b. Neutron number
c. Atomic number
d. Atomic Weight
Answer- Atomic number
Que- The chemical name of quartz is
a. Calcium oxide
b. Calcium phosphate
c. Sodium phosphate
d. Sodium silicate
Answer- Sodium silicate
Que- What is the most common salt in sea water ?
a. Calcium carbonate
b. Potassium chloride
c. Sodium chloride
d. Magnesium sulphate
Answer- Sodium chloride
Que- Fertiliser having high nitrogen content is :
a. Urea
b. Ammonium sulphate
c. Ammonium nitrate
d. Calcium citrate
Answer- Ammonium nitrate
Que- Which one of the following is found in kidney stones?
a. Sodium oxalate
b. Calcium oxalate
c. Sodium chloride
d. Calcium acetate
Answer- Calcium oxalate
Que- Which one of the following is not present in cement ?
a. Clay
b. Alumina
c. Alum
d. Gypsum
Answer- Alum