Que- The important ore of aluminium is
a. Bauxite
b. Cryolite
c. Fluorspar
d. Haematite
Answer- Bauxite
Que- The National Chemical Laboratory is situated in
a. New Delhi
b. Bangalore
c. Pune
d. Patna
Answer- Pune
Que- Equal masses of oxygen, hydrogen and methane are kept under identical conditions. The ratio of the volumes of gases will be
a. 2 : 16 : 2
b. 2 : 16 : 1
c. 1 : 16 : 2
d. 1 : 1 : 1
Answer- 1 : 16 : 2
Que- The mass number of an atom is equal to
a. the number of protons
b. the number of protons and electrons
c. the number of nucleons
d. the number of neutrons
Answer- the number of nucleons
Que- The water pollution in river is measured by the dissolved amount of
a. Chlorine
b. Ozone
c. Nitrogen
d. Oxygen
Answer- Oxygen
Que- Ultraviolet rays can be used in water treatment as
a. Flocculator
b. Precipitator
c. Hydrolyser
d. Disinfectant
Answer- Disinfectant
Que- Tar roads get damaged if there is
a. Stagnation of water on road
b. Heavy traffic
c. No maintenance
d. No sloping
Answer- Stagnation of water on road
Que- Aerated water contains
a. SO2
b. NO2
c. H2
d. CO2
Answer- CO2
Que- The BOD values of water indicate the
a. Amount of organic debris
b. Amount of oxygen used for biochemical oxidation
c. Amount of oxygen used for biochemical reduction
d. Amount of ozone used for biochemical oxidation
Answer- Amount of oxygen used for biochemical oxidation
Que- The most reactive among the halogens is
a. Fluorine
b. Chlorine
c. Bromine
d. Iodine
Answer- Fluorine
Que- Which one element has the lowest electronegativity value
a. Fluorine
b. Chlorine
c. Francium
d. Radium
Answer- Francium
Que- Which one element has the highest electronegativity value
a. Lithium
b. Nitrogen
c. Chlorine
d. Fluorine
Answer- Fluorine
Que- The element with highest ionization potential is
a. Oxygen
b. Carbon
c. Helium
d. Boron
Answer- Helium
Que- Which of the following has no unit?
a. Electronegativity
b. Electron affinity
c. Ionization energy
d. Excitation potential
Answer- Electronegativity
Que- Which of the following vegetable oils does not contain essential fatty acids ?
a. Sunflower oil
b. Mustard oil
c. Coconut oil
d. Groundnut oil
Answer- Sunflower oil
Que- The example of oligosaccharide is
a. Sucrose
b. Glucose
c. Ribose
d. Cellulose
Answer- Sucrose
Que- Number of hydrogen atoms in a Glucose molecule is
a. 6
b. 8
c. 12
d. 14
Answer- 12
Que- The residue left after extracting juice from sugarbeet and sugarcane is called
a. Molasses
b. Bagasse
c. Whey
d. Biomass
Answer- Bagasse
Que- Nitrogen is an essential constituent of all :
a. Fats
b. Proteins
c. Vitamins
d. Carbohydrates
Answer- Proteins
Que- A subshell with l = 2 can take up
a. 3 electron
b. 5 electron
c. 8 electron
d. 10 electron
Answer- 10 electron
Que- Two electrons in an orbital are differentiated by which of the following ?
a. Magnetic quantum number
b. Spin quantum number
c. Principal quantum number
d. Azimuthal quantum number
Answer- Spin quantum number
Que- When cathode rays strike a target of high atomic weight, they give rise to
a. alpha-rays
b. beta and gamma rays
c. X-rays
d. Positive rays
Answer- X-rays
Que- How many electrons can be accommodated in d-orbital?
a. 3
b. 6
c. 8
d. 10
Answer- 10
Que- The scientist who experimentally proved the existence of positron is
a. Fermi
b. Anderson
c. Bohr
d. Bethe
Answer- Anderson
Que- Which of the following phenomenon is considered responsible for Global Warming?
a. Greenhouse effect
b. Fire in coal mines
c. Dry farming
d. MonsoonE. Trade winds
Answer- Greenhouse effect
Que- The nucleus of an atom consists of
a. electrons and neutrons
b. electrons and protons
c. protons and neutrons
d. All of the above
Answer- protons and neutrons
Que- The number of moles of solute present in 1 kg of a solvent is called its
a. molality
b. molarity
c. normality
d. formality
Answer- molality
Que- The most electronegative element among the following is
a. sodium
b. bromine
c. fluorine
d. oxygen
Answer- fluorine
Que- The metal used to recover copper from a solution of copper sulphate is
a. Na
b. Ag
c. Hg
d. Fe
Answer- Fe
Que- The first organic compound synthesised in the laboratory was
a. Urea
b. Uric acid
c. Lactic acid
d. Glucose
Answer- Glucose
Que- Among the following, carbonate ore of Zinc is
a. Zinc blende
b. Calamine
c. Sphalerite
d. Zincite
Answer- Calamine
Que- The metal used for making aircrafts and rockets is
a. Lead
b. Aluminium
c. Nickel
d. Copper
Answer- Nickel
Que- The compound that has the least value for octane number is :
a. 2-methyl heptane
b. Iso-octane
c. 2,2-dimethyl hexane
d. N-heptane
Answer- N-heptane
Que- The length of double bond is _______ than single bond.
a. Shorter
b. Longer
c. Of same lenght
d. None of the above
Answer- Shorter
Que- ""Paramagnetism"" is the property of
a. Paired electrons
b. Completely filled electronics subshells
c. Unpaired electrons
d. Completely vacant electronic subshells
Answer- Unpaired electrons
Que- The structure of NaCl crystal is
a. Body centered cubic
b. Face centered cubic
c. Octahedral
d. Square planar
Answer- Face centered cubic
Que- Which of the following is a renewable source of energy ?
a. Coal
b. Geothermal power
c. Natural gas
d. Uranium
Answer- Geothermal power
Que- Gobar gas contains mainly :
a. Methane
b. Ethylene
c. Propylene
d. Acetylene
Answer- Methane
Que- Gobar gas mainly contains
a. Carbon dioxide
b. Carbon monoxide
c. Hydrogen sulphide
d. Methane
Answer- Methane
Que- The main constituent of biogas is
a. Oxygen
b. Methane
c. Acetic acid
d. Methyl alcohol
Answer- Methane
Que- An example of replenishable energy source is–
a. Coal
b. Petroleum
c. Lignite
d. Biomass
Answer- Biomass
Que- Which of the following is used as non-stick coating for cooking utensils?
a. Perspex
b. Styrofoam
c. Polystyrene
d. Teflon
Answer- Teflon
Que- The fibre least prone to catch fire is
a. Nylon
b. Polyester
c. Cotton
d. Terylene
Answer- Cotton
Que- Which of the following is used to make light weight, but strong plastic ?
a. Nylon
b. Polythene
c. Polyvinyl Chloride
d. Methyl Methacrylate
Answer- Polyvinyl Chloride
Que- Which of the following fibres catches fire least ?
a. Nylon
b. Cotton
c. Rayon
d. Terricot
Answer- Cotton
Que- Non-stick kitchenwares are coated with
a. PVC
b. Graphite
c. Teflon
d. Silicon
Answer- Teflon
Que- Which one of the following minerals is found in Monazite sand ?
a. Potassium
b. Uranium
c. Thorium
d. Sodium
Answer- Thorium
Que- Which of the following is the main compound of voter ink?
a. Silver nitrate
b. Ammonium Chloride
c. Silver Chloride
d. Ammonium Nitrate
Answer- Silver nitrate
Que- The heaviest naturally occurring element is:
a. Mercury
b. Polonium
c. Thorium
d. Uranium
Answer- Uranium
Que- In which of the following ions , the colour is not due to d-d transition ?
a. [Ti(H2O)6]3+
b. [CoF6]3+
c. [CrO4]2−
d. [Cu(NH3)4]2+
Answer- [CrO4]2−
Que- What is Zeolite?
a. Hydrated Aluminosilicate
b. Hydrated Calcium Sulphate
c. Dehydrated Aluminosilicate
d. Dehydrated Calcium Sulphate
Answer- Hydrated Aluminosilicate
Que- Laughing gas is
a. Nitric oxide
b. Nitrous oxide
c. Nitrogen trioxide
d. Nitrogen pentoxide
Answer- Nitrous oxide
Que- Electric fuse is an alloy of
a. Tin and lead
b. Zinc and lead
c. Copper and iron
d. Carbon and tin
Answer- Tin and lead
Que- Detergents used for cleaning clothes and utensils contain
a. Nitrates
b. Bicarbonates
c. Sulphonates
d. Bismuthates
Answer- Sulphonates
Que- Which one of the following chemicals helps in fruit ripening?
a. Ethephon
b. Atrazine
c. Isoproturan
d. Malathion
Answer- Ethephon
Que- Which of the following chemicals is used in photography ?
a. Aluminium hydroxide
b. Silver bromide
c. Potassium nitrate
d. Sodium chloride
Answer- Silver bromide
Que- Atomic number is the number equal to
a. Protons
b. Electrons
c. Neutrons
d. None of the above
Answer- Protons
Que- Rutherford’s scattering experiment proved the presence of
a. Atoms in all matter
b. Electrons in atoms
c. Neutrons in atoms
d. Nucleus in atoms
Answer- Nucleus in atoms
Que- Number of neutrons in an atom of hydrogen is
a. One
b. Zero
c. Two
d. Three
Answer- Zero
Que- The atomic number of carbon is 6 and its atomic mass is 12. How many are there protons in the nucleus of carbon ?
a. 6
b. 12
c. 18
d. Zero
Answer- 6
Que- An atom of an element has atomic number 17 and mass number 36. The number of neutrons in its nucleus is
a. 17
b. 19
c. 36
d. 53
Answer- 19
Que- Which one of the following contributes largely to the ‘green house effect’ ?
a. Ozone
b. Carbon monoxide
c. Carbon dioxide
d. Water vapour
Answer- Water vapour
Que- An important green-house gas other than methane being produced from the agricultural fields is
a. Nitrous oxide
b. Ammonia
c. Sulphur dioxide
d. Arsine
Answer- Nitrous oxide
Que- The gas which is mainly responsible for the green house effect is:
a. Ozone
b. Oxygen
c. Carbon dioxide
d. Carbon monoxide
Answer- Carbon dioxide
Que- Chernobyl disaster is the result of pollution by
a. Oil spill
b. Acid rain
c. Carbon dioxide
d. Radioactive waste
Answer- Radioactive waste
Que- ‘Aerosol’ is known as
a. Suspended solid particles in air
b. Pollutant gas, present in air
c. Microbes, present in air
d. Green house gas present in air
Answer- Suspended solid particles in air
Que- The percentage of Nitrogen in Air is
a. 0.94
b. 0.03
c. 78.03
d. 85.02
Answer- 78.03
Que- Air is said to be saturated when :
a. It contains maximum content of water vapour
b. Its pressure is minimum
c. Its thickness is maximum
d. It blows over the barren land
Answer- It contains maximum content of water vapour
Que- For extinguishing fire, we use
a. Hydrogen
b. Carbon Monoxide
c. Carbon Dioxide
d. Marsh gas
Answer- Carbon Dioxide
Que- Dry powder fire extinguishers contain
a. Sand
b. Sand and sodium carbonate
c. Sand and potassium carbonate
d. Sand and sodium bicarbonate
Answer- Sand and sodium bicarbonate
Que- Dry ice is the solid form of :
a. Air
b. Carbon dioxide
c. Nitrogen
d. Water
Answer- Carbon dioxide
Que- Detergents are
a. Sodium salts of fatty acids
b. Sodium salts of sulphonic acids
c. Sodium salt of benzoic acid
d. None of the above
Answer- Sodium salts of sulphonic acids
Que- The metal compound commonly found in Sindhoor or Kumkum is based on
a. Tin
b. Lead
c. Copper
d. Zinc
Answer- Lead
Que- Substance used as an anti freeze in radiators of automobiles is :
a. Methyl alcohol and H2O
b. Methyl alcohol
c. Ethyl alcohol
d. Ethyl alcohol and H2O
Answer- Methyl alcohol and H2O
Que- Which of the following is used to remove rust stains on cloth?
a. Kerosene
b. Lime
c. Oxalic acid solution
d. Petrol
Answer- Oxalic acid solution
Que- Which is not an anasthetic agent in surgical operations?
a. Chloroform
b. Ether
c. Nitrous oxide
d. Acetone
Answer- Acetone
Que- 'Acid rain' is caused due to air pollution by
a. Carbon dioxide
b. Carbon monoxide
c. Methane
d. Nitrous oxide and sulphur dioxide
Answer- Nitrous oxide and sulphur dioxide
Que- Gas released during Bhopal tragedy was :
a. Sodium isothiocyanate
b. Potassium isothiocyanate
c. Ethyl isocyanate
d. Methyl isocyanate
Answer- Methyl isocyanate
Que- The filter over which sewage is sprinkled is called as
a. Trickling filter
b. Percolating filter
c. Contact bed
d. Intermittent sand filter
Answer- Trickling filter
Que- Main source of lead pollution is from
a. Sewage
b. Leaded gasoline
c. Tobacco
d. Insecticides
Answer- Leaded gasoline
Que- An example of major air pollutant is
a. Oxygen
b. Carbon monoxide
c. Helium
d. Carbon dioxide
Answer- Carbon monoxide
Que- The nuclear particles which are assumed to hold the nucleons together are
a. electrons
b. positrons
c. neutrons
d. mesons
Answer- mesons
Que- The mass of P4O10 that will be obtained from the reaction of 1.33 gram of P4 and 5.07 of oxygen is
a. 2.05 gram
b. 3.05 gram
c. 4.05 gram
d. 5.05 gram
Answer- 3.05 gram
Que- The octane number of zero is assigned to
a. 2-methyl octane
b. n-heptane
c. iso-octane
d. 3-methyl octane
Answer- n-heptane
Que- The metal that is used as a catalyst in the hydrogenation of oils is
a. Ni
b. Pb
c. Cu
d. Pt
Answer- Ni
Que- The most abundant rare gas in the atmosphere is
a. He
b. Ne
c. Ar
d. Xe
Answer- Ar
Que- Maximum permissible concentration of copper in drinking water in mg/L is
a. 0.01
b. 0.05
c. 1.0
d. 2.0
Answer- 1.0
Que- The amount of chlorine available in water after disinfection is called as
a. Free chlorine
b. Residual chlorine
c. Free available chlorine
d. Combined available chlorine
Answer- Residual chlorine
Que- Maximum permissible concentration of total hardness in drinking water is
a. 50
b. 100
c. 200
d. 500
Answer- 200
Que- Which one of the following is extensively used for sterilizing water ?
a. Bleaching powder
b. Alum
c. Borax powder
d. Soda powder
Answer- Bleaching powder
Que- Assertion (A) : Synthetic detergents can lather when in hard water. Reason (R) : Synthetic detergents form soluble calcium and magnesium salts with hard water.
a. Both A and R is true and R is the correct explanation of A
b. Both A and R is true but R is not a correct explanation of A
c. A is true but R is false
d. A is false but R is true
Answer- Both A and R is true and R is the correct explanation of A
Que- Which one is the most reactive halogen?
a. Iodine
b. Bromine
c. Fluorine
d. Chlorine
Answer- Fluorine
Que- Who first published the periodic table?
a. John Dalton
b. Julius Lothar Meyer
c. Henry Moseley
d. Dmitri Mendeleev
Answer- Dmitri Mendeleev
Que- The most suitable vessel for storing concentrated sulphuric acid is
a. Copper vessel
b. Aluminium vessel
c. Glass vessel
d. Earthen vessel
Answer- Glass vessel
Que- Which one of the following nonmetals shows allotropy in the liquid state?
a. Carbon
b. Sulphur
c. Phosphorous
d. Bromine
Answer- Sulphur
Que- Sulphuric acid is
a. Monobasic
b. Dibasic
c. Tribasic
d. Tetrabasic
Answer- Dibasic
Que- The buffer action of blood is due to the presence of
a. HCI and NaCI
b. CI– and [CO3]2–
c. CI– and [HCO3]–
d. [HCO3]– and H2CO3
Answer- [HCO3]– and H2CO3
Que- Bakelite is a co-polymer of Phenol and
a. Formaldehyde
b. Acetaldehyde
c. Benzaldehyde
d. Cinnaldehyde
Answer- Formaldehyde
Que- Which of the following is not an addition polymer?
a. Nylon
b. PVC
c. Polythene
d. Polystyrene
Answer- Nylon
Que- The polymer used in making plastic crockery is
a. Decron
b. Nylon
c. Bakelite
d. Melamine
Answer- Melamine