Que- Total number of naturally occurring elements
a. 62
b. 92
c. 98
d. 110
Answer- 92
Que- The coloured discharge tubes for advertisement mainly contain
a. Xenon
b. Argon
c. Helium
d. Neon
Answer- Neon
Que- Natural rubber is a polymer of
a. Vinyl acetate
b. Propene
c. Isoprene
d. Styrene
Answer- Isoprene
Que- What is a Bakelite ?
a. Solution
b. Acid
c. Base
d. Polymer
Answer- Polymer
Que- What happens when a drop of glycerol is added to crushed KMnO4 spread on a paper ?
a. There is a crackling sound
b. There is a violent explosion.
c. There is no reaction.
d. The paper ignites
Answer- There is a violent explosion.
Que- Silver nitrate solution is kept in brown bottles in laboratory because
a. It reacts with ordinary white bottles
b. Brown bottles stops the passage of light through it
c. Brown bottles do not react with it
d. Brown bottles react with it
Answer- Brown bottles stops the passage of light through it
Que- Which colour is produce by Arsenic during flame test?
a. Green
b. Red
c. Crimson
d. Blue
Answer- Blue
Que- The natural resource, known as black gold is
a. Coal
b. Lead
c. Tin
d. Platinum
Answer- Coal
Que- The chief constituent of natural gas is:
a. Methane
b. Helium
c. Nitrogen
d. Propane
Answer- Methane
Que- The resources which can be used continuously, year-after-year are called
a. Biotic
b. Abiotic
c. Non-renewable
d. Renewable
Answer- Renewable
Que- The highest volume of gases in lower atmosphere is comprised of
a. Hydrogen
b. Carbon dioxide
c. Oxygen
d. Nitrogen
Answer- Nitrogen
Que- What is the maximum Water Vapour content in the atmosphere?
a. 2 to 3 per cent
b. 3 to 4 per cent
c. 4 to 5 per cent
d. 5 to 6 per cent
Answer- 3 to 4 per cent
Que- Which of the process is known as nitrification?
a. Reaction of Nitrogen Monoxide with oxygen to form nitric acid
b. Reaction of nitrogen dioxide with water to form nitric acid
c. Conversion of ammonia to nitrites
d. Conversion of nitrite to nitric oxide
Answer- Conversion of ammonia to nitrites
Que- Which is not a green house gas ?
a. CO2
b. CH4
c. N2O
d. Chlorofluorocarbons
Answer- N2O
Que- Formation of ozone hole is maximum over
a. Africa
b. India
c. Antarctica
d. Europe
Answer- Antarctica
Que- Ozone saves the biosphere by absorbing high energy radiations called ________ .
a. Infra-red (IR)
b. Gamma rays
c. Ultraviolet rays (UV)
d. X–rays
Answer- Ultraviolet rays (UV)
Que- Which one of the following is not a cause for present global warming and climate change ?
a. CFC emission
b. Carbon dioxide emission
c. Deforestation
d. Methane emission
Answer- Deforestation
Que- Which one of the following elements is least likely to be found in commercial fertilisers?
a. Nitrogen
b. Phosphorous
c. Potassium
d. Silicon
Answer- Silicon
Que- Which of the following is caused by the higher concentration of Nitrogen and Phosphorous ?
a. Eutrophication
b. Hardness
c. Alkalinity
d. Acidity
Answer- Eutrophication
Que- If the sewage is fully oxidized, the nitrogen is in the form of
a. Nitrites
b. Ammonia
c. Nitramines
d. Nitrates
Answer- Nitrates
Que- If all bullets could not be removed from gun shot injury of a man, it may cause poisoning by
a. Mercury
b. Lead
c. Iron
d. Arsenic
Answer- Lead
Que- Extensively used nitrogenous fertilizer is
a. Ammonium nitrate
b. Urea
c. Ammonium sulphate
d. Nitro-lime
Answer- Urea
Que- What is the atomic number of mercury?
a. 32
b. 41
c. 63
d. 80
Answer- 80
Que- Which of the following molecules has a bond order of 2.5?
a. HCL
b. CO
c. F2
d. NO
Answer- F2
Que- An element of atomic no. 29 belongs to
a. S-block
b. D-block
c. P-block
d. F-block
Answer- D-block
Que- Which metal is the heaviest in periodic table among the following ?
a. Os
b. Pt
c. Pb
d. W
Answer- Os
Que- Ruby and sapphire are oxides of
a. Copper
b. Tin
c. Iron
d. Aluminium
Answer- Aluminium
Que- One carat of diamond is equal to
a. 100 mg
b. 150 mg
c. 200 mg
d. 250 mg
Answer- 200 mg
Que- Carbon dioxide is
a. A reducing agent
b. An oxidising agent
c. A dehydrating agent
d. A bleaching agent
Answer- A reducing agent
Que- Hardest allotrope of carbon is
a. Diamond
b. Graphite
c. Coke
d. Lamp black
Answer- Diamond
Que- Diamond is lustrous because
a. It is colourless
b. It is hard
c. It is pure
d. Its refractive index is high
Answer- Its refractive index is high
Que- Dry ice is
a. Solid ammonia
b. Solid sulphur dioxide
c. Dry carbon dioxide gas
d. Solid carbon dioxide
Answer- Solid carbon dioxide
Que- Yellow Cake an item of smuggling across border is
a. A crude from of heroin
b. A crude from of cocaine
c. Uranium oxide
d. Unreformed gold
Answer- Uranium oxide
Que- The transuranium elements are the chemical elements with atomic numbers greater than
a. 86
b. 89
c. 92
d. 96
Answer- 92
Que- Which of the following elements is non-radioactive ?
a. Uranium
b. Thorium
c. Plutonium
d. Zirconium
Answer- Zirconium
Que- Which of the following is used in dating archaeological findings ?
a. 92235U
b. 614C
c. 13H
d. 818O
Answer- 614C
Que- German silver used for making utensils is an alloy of
a. Copper, silver, nickel
b. Copper, zinc, nickel
c. Copper, zinc, aluminium
d. Copper, nickel, aluminium
Answer- Copper, zinc, nickel
Que- The coordination number of body centered atom in cubic structure is
a. 4
b. 6
c. 8
d. 10
Answer- 8
Que- The product, 9-nitroanthracene is obtained from anthracene by the action of
a. Nitric acid and acetic anhydride
b. Nitric acid and ethyl alcohol
c. Nitric acid and acetic acid
d. Nitric acid in excess
Answer- Nitric acid and acetic anhydride
Que- Cyanide poisoning causes death in seconds because
a. It denatures enzymes of the heart/muscle
b. It breaks the electron transport chain
c. It causes Lysis of red blood cells
d. It causes cardiac arrest
Answer- It causes cardiac arrest
Que- Peroxyacetyl nitrate is a
a. Acidic dye
b. Plant hormone
c. Vitamin
d. Secondary pollutant
Answer- Secondary pollutant
Que- What is used in storage batteries?
a. Copper
b. Tin
c. Lead
d. Zinc
Answer- Lead
Que- Match the List-I with List-II and select the correct answer using the codes given below the listsList-I (Green house gas)List-II(Major source)F.Carbondioxide1.Enteric fermentation in cattleG.Methane2.Burning of fossilH.Chloroflro carbons3.Mercury compounds in waste waterJ.Nitrous oxide4.Nylon production 5.Air conditioner and refrigeration unitsCodes :FGHJA.2154B.3421C.3241D.1234
a. A
b. B
c. C
d. D
Answer- A
Que- Acid rain is caused by
a. SO2 and particulates
b. NO2and particulates
c. CO2and CFCs
d. SO2 and NO2
Answer- SO2 and NO2
Que- The Bhopal gas tragedy was caused by the gas
a. Methyl chloride
b. Methyl Isocyanide
c. Methyl Isocyanate
d. Methyl Cyanide
Answer- Methyl Isocyanate
Que- The Bhopal tragedy was caused by the gas
a. Phosgene
b. Carbon monoxide
c. Methyl isocyanate
d. Chlorine
Answer- Methyl isocyanate
Que- Which of the following caused radioactive pollution along the coast of Kerala ?
a. Plutonium
b. Zinc
c. Thorium
d. Radium
Answer- Thorium
Que- When a spoon is to be electroplated with nickel the spoon is
a. Dipped in a nickel sulphate solution
b. Made anode and a pure nickel rod, the cathode
c. Made cathode and a pure nickel red, the anode
d. Coated with nickel sulphate and dried
Answer- Made cathode and a pure nickel red, the anode
Que- Conversion of chemical energy into electrical energy occurs in
a. Atomic bombs
b. Dynamo
c. A battery
d. Electric heaters
Answer- A battery
Que- The process of covering water pipes made of Iron with Zinc layer to prevent corrosion is called :
a. Zinc plating
b. Alloy formation
c. Vulcanization
d. Galvanization
Answer- Galvanization
Que- Galvanization of iron is carried out using
a. Zinc
b. Tin
c. Copper
d. Chromium
Answer- Zinc
Que- The working of a dry cell is based on
a. Decomposition reaction
b. Spontaneous oxidation-reduction reaction
c. Combination reaction
d. Electrolysis
Answer- Electrolysis
Que- The addition of gypsum to portland cement helps in :
a. Increasing the strength of cement
b. Rapid setting of cement
c. Preventing rapid setting of cement
d. Reduction in the cost of cement
Answer- Preventing rapid setting of cement
Que- Which gas is most stable at room temperature?
a. H2
b. N2
c. F2
d. O2
Answer- N2
Que- Which of the following is used as a preservative to protect processed food?
a. Sodium sulphate
b. Saccharin
c. BHT
d. Sodium metabisulphite
Answer- Sodium metabisulphite
Que- Chemical composition of cement is
a. Limestone and Clay
b. Limestone, Clay and Gypsum
c. Limestone and Gypsum
d. Clay and Gypsum
Answer- Limestone, Clay and Gypsum
Que- Which one of the following elements is used in the manufacture of fertilizers ?
a. Fluorine
b. Potassium
c. Lead
d. Aluminium
Answer- Potassium
Que- Milk is
a. Emulsion
b. Suspension
c. Foam
d. Gel
Answer- Emulsion
Que- Milk is a natural
a. Solution
b. Emulsion
c. Mixture
d. Suspension
Answer- Emulsion
Que- Emulsifier is an agent which
a. Accelerates the dispersion
b. Homogenizes the emulsion
c. Stabilizes an emulsion
d. Aids the flocculation of emulsion
Answer- Stabilizes an emulsion
Que- An emulsifier is an agent which
a. Stabilises an emulsion
b. Aids the flocculation of an emulsion
c. Accelerates the dispersion
d. Homogenises an emulsion
Answer- Stabilises an emulsion
Que- Muddy water is treated with alum in purification process, it is termed as :
a. Emulsification
b. Absorption
c. Adsorption
d. Coagulation
Answer- Coagulation
Que- Carborundum is another name of
a. Silicon carbide
b. Silicon oxide
c. Calcium carbide
d. Calcium oxide
Answer- Silicon carbide
Que- 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
Answer- Zinc, copper and nickel
Que- Which one of the following does not contain Silver ?
a. Ruby Silver
b. Lunar Caustic
c. German Silver
d. Horn Silver
Answer- German Silver
Que- Type metal used in printing press is an alloy of
a. Lead and copper
b. Lead and antimony
c. Lead and bismuth
d. Lead and zinc
Answer- Lead and antimony
Que- Ultra purification of a metal is done by :
a. Slugging
b. Zone melting
c. Smelting
d. Leaching
Answer- Zone melting
Que- Silicon is used in
a. Solar energy devices
b. Semiconductors
c. Transistors
d. All of these
Answer- All of these
Que- Which of the inert gases can form compounds?
a. Helium
b. Xenon
c. Krypton
d. Argon
Answer- Xenon
Que- Vulcanized rubber contains sulphur
a. 2%
b. 3-5%
c. 7-9%
d. 10-15%
Answer- 3-5%
Que- Which of the following alloy is used in making magnet ?
a. Duralumin
b. Stainless steel
c. Alnico
d. Magnalium
Answer- Alnico
Que- In its reaction with silver nitrate, C2H2 shows
a. Oxidising property
b. Reducing property
c. Basic property
d. Acidic property
Answer- Acidic property
Que- Major portion of the earth’s crust is mainly constituted by
a. Oxygen and Iron
b. Oxygen and Silicon
c. Silicon and Iron
d. Silicon and Aluminium
Answer- Oxygen and Silicon
Que- In surgery, metal pins are used for joining together broken bones. These metal pins remain uncorroded in the body. What is the material of these pins?
a. Copper
b. Iron
c. Aluminium
d. Titanium
Answer- Titanium
Que- Name two elements that find wide application in transistor industry.
a. Silicon and Germanium
b. Carbon and Platinum
c. Iridium and Germanium
d. Tungsten and Platinum
Answer- Silicon and Germanium
Que- Which one is the naturally occuring heaviest element?
a. Mercury
b. Thorium
c. Uranium
d. Protactinium
Answer- Uranium
Que- Which of the following will replace hydrogen from acids to form salts ?
a. S
b. Na
c. Ag
d. P
Answer- Na
Que- The main component of liquid bleach is:
a. Sodium chloride
b. Sodium hypochlorite
c. Hydrochloric acid
d. Sodium hypochlorate
Answer- Sodium hypochlorite
Que- Quartz is made of
a. Calcium Sulphate
b. Calcium Silicate
c. Sodium Sulphate
d. Sodium Silicate
Answer- Sodium Silicate
Que- What is the product formed when sodium bicarbonate is heated strongly?
a. Sodium Carbonate
b. Sodium Hydroxide
c. Sodium Peroxide
d. Sodium Monoxide
Answer- Sodium Carbonate
Que- Cement is formed by strongly heating a mixture of
a. Limestone and graphite
b. Limestone and clay
c. Chalk and graphite
d. Clay and graphite
Answer- Limestone and clay
Que- Persons working in cement plants and lime stone quarries are prone to disease like
a. Cancer
b. Asthma
c. Silicosis
d. Pneumoconiosis
Answer- Silicosis
Que- Sodium vapour lamps glow with yellow colour. This is due to
a. sublimation of sodium to emit yellow colour
b. The emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum
c. The low ionisation energy of sodium
d. Its ability to absorb all other colours except yellow
Answer- The emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum
Que- Which amidst the following is not a gem stone ?
a. Cat's-eye
b. Topaz
c. Opal
d. Pearl
Answer- Cat's-eye
Que- Calcium salts used as fertilizer is :
a. Calcium Carbide
b. Calcium Carbonate
c. Calcium Cyanide
d. Calcium Sulphate
Answer- Calcium Sulphate
Que- Aluminium salt commonly used to stop bleeding is
a. Aluminium nitrate
b. Aluminium sulphate
c. Aluminium Chloride
d. Potash alum
Answer- Aluminium sulphate
Que- In silvery paints, the main constituent present is
a. Aluminium powder
b. Silver powder
c. Lead powder
d. White lead
Answer- Aluminium powder
Que- Which of the following appeared to be with a significant potential for accumulation through food chains ?
a. DDT
b. Parathion
c. Lindane
d. Carbaryl
Answer- DDT
Que- Higher concentration of nitrogen dioxide in atmosphere air causes
a. Cancer
b. Bronchitis
c. Asphyxiation
d. Corrosion
Answer- Bronchitis
Que- Which of the following in automobile exhaust can cause cancer?
a. Oxides of nitrogen
b. Carbon monoxide
c. Lead
d. Polyclinic hydrocarbons
Answer- Polyclinic hydrocarbons
Que- White lung cancer is caused by
a. Asbestos
b. Silica
c. Textiles
d. Paper
Answer- Textiles
Que- Which of the following is a man-made source of air pollution ?
a. Automobile exhaust
b. Forest fire
c. Bacterial action in soil and swamp areas
d. All of the above
Answer- Automobile exhaust
Que- Which of the following pollutants is main product of automobile exhaust ?
a. CO
b. CO2
c. NO
d. Hydrocarbons
Answer- NO
Que- The smog is essentially caused by the presence of
a. O3 and N2
b. O2 and N2
c. Oxides of N and S
d. O2 and O3
Answer- Oxides of N and S
Que- The depletion in Ozone layer is caused by ________ .
a. Nitrous oxide
b. Carbon dioxide
c. Chlorofluorocarbons
d. Methane
Answer- Chlorofluorocarbons
Que- Which of the following is the maximum number of electrons that can be present in M-shell?
a. 2
b. 8
c. 18
d. 32
Answer- 18
Que- Atoms of different elements have
a. Same atomic number and same electronic configuration
b. Different atomic number and same eletronic configu-ration
c. Different atomic number and different number of valence electrons
d. Same number of electrons and neutrons
Answer- Different atomic number and different number of valence electrons
Que- A potato tuber has been cut into two halves. A few drops of iodine solution are placed on the cut surface of one of the halves. What colour change will be noticed?
a. From brown to blue-black
b. From brown to orange-red
c. From blue to pink
d. From pink to blue-green
Answer- From brown to blue-black
Que- An electrochemical cell which is used as a source of direct electrical current at constant voltage under standard conditions is called a :
a. Power transmittor
b. Battery
c. Uninterrupted power supply (UPS)
d. Generator
Answer- Battery
Que- The metals commonly used for electroplating are
a. Gold, Sodium and Chromium
b. Chromium, Copper and Nickel
c. Nickel, Lead and Chromium
d. Gold, Sodium and Potassium
Answer- Chromium, Copper and Nickel