Que- The polymerisation of which often following is used in manufacturing of polythene in industry ?
a. Methane
b. Styrene
c. Acetylene
d. Ethylene
Answer- Ethylene
Que- Brass gets discoloured in air due to constant exposure in presence of:
a. Aluminium phosphide
b. Hydrogen sulphide
c. Hydrogenated wafers
d. Aluminium sulphide
Answer- Hydrogen sulphide
Que- Which of the following is not present in German silver?
a. Copper
b. Nickel
c. Silver
d. Zinc
Answer- Silver
Que- Haloarenes are more stable than haloalkanes due to
a. Resonance effect
b. Inductive effect
c. Hyper conjugative effect
d. All of them
Answer- Resonance effect
Que- The unit of ionic product of water (Kw) is :
a. Mol2 let-1
b. Mol2 let-2
c. Mol-1 let-2
d. Mol-1 let-1
Answer- Mol2 let-2
Que- Aluminium chloride is
a. Bronsted Lowry Acid
b. Arrhenius Acid
c. Lewis Acid
d. Lewis Base
Answer- Lewis Acid
Que- Which of the following is not a method of preparing oxygen?
a. Electrolysis of water
b. Fractional distillation of liquid air
c. Decomposition of potassium permanganate
d. Decomposition of manganese dioxide
Answer- Decomposition of manganese dioxide
Que- Which one of the following statements is not correct? Vulcanisation of rubber makes it
a. Soft and flexible
b. Strong and hard
c. Chemical resistant
d. Withstand higher temperatures
Answer- Soft and flexible
Que- The compounds formed when hydrogen combines with p-block elements are called
a. Ionic hydrides
b. Molecular hydrides
c. Metallic hydrides
d. Polynuclear hydrides
Answer- Molecular hydrides
Que- In vulcanisation process, rubber can be hardened by adding
a. Nitrogen
b. Silicon
c. Sulphur
d. Alcohol
Answer- Sulphur
Que- The substance that is added to make natural rubber strong and more bouncy is
a. Polythene
b. Sponge
c. Sulphur
d. Chlorine
Answer- Sulphur
Que- White phosphorus is always kept under
a. Benzene
b. Kerosene
c. Ether
d. Water
Answer- Water
Que- Milk is a colloidal system in which:
a. Water is dispersed in fat
b. Fat is dispersed in water
c. Fat and water are dispersed in each other
d. Fat is dissolved
Answer- Fat is dispersed in water
Que- An emulsion is a colloid of a
a. Gas in a liquid
b. Liquid in a liquid
c. Liquid in a gas
d. Gas in a solid
Answer- Liquid in a liquid
Que- An emulsion is a colloidal solution of
a. Liquid in liquid
b. Solid in liquid
c. Gas in solid
d. Solid in Solid
Answer- Liquid in liquid
Que- Colloids can be purified by
a. Condensation
b. Condensation
c. Condensation
d. Dialysis
Answer- Dialysis
Que- The tip of the match-stick contains
a. Phosphorus pentoxide
b. White phosphorus
c. Red phosphorus
d. Phosphorus trichloride
Answer- Red phosphorus
Que- Which of the following is a natural dye ?
a. Crystal violet
b. Aniline blue
c. Alizarin
d. Phenolphthalein
Answer- Alizarin
Que- Poison used for killing rats is
a. Calcium phosphide (Ca3P2)
b. Zinc phosphide (Zn3P2)
c. Magnesium nitride (Mg3N2)
d. Magnesium phosphide (Mg3P2)
Answer- Zinc phosphide (Zn3P2)
Que- The chemical used in developing photographic films is
a. Silver bromide
b. Hypo
c. Sodium sulphate
d. Hydroquinone
Answer- Silver bromide
Que- Which one of the following is used as an anti-freeze for the automobile engines ?
a. Propyl alcohol
b. Ethanol
c. Methanol
d. Ethylene glycol
Answer- Ethylene glycol
Que- A fertile soil is likely to have a pH of
a. 3
b. 9
c. 6-7
d. 14
Answer- 6-7
Que- Litmus is obtained from
a. A bacterium
b. A fungus
c. An alga
d. Lichen
Answer- Lichen
Que- The pH of lemon juice is expected to be
a. Equal to 7
b. More than 7
c. Less than 7
d. Nothing can be predicted
Answer- Less than 7
Que- Antacids are found in drugs that give relief to
a. Eye sight
b. Stomach ache
c. Acne
d. Headache
Answer- Stomach ache
Que- The pH of human blood is between
a. 6.5-7
b. 7.5-8
c. 8-9
d. 4.5-5
Answer- 7.5-8
Que- Petroleum is a mixture of
a. Elements
b. Hydrocarbons
c. Polymers
d. Salts
Answer- Hydrocarbons
Que- Which of the following contains high content of lead?
a. Coal
b. Cooking gas
c. High octane fuel
d. Low octane fuel
Answer- High octane fuel
Que- Piped Natural Gas (PNG) is used for
a. Mining
b. Welding
c. Anaesthesia
d. Cooking
Answer- Cooking
Que- Petroleum consists of a mixture of
a. Carbohydrates
b. Carbonates
c. Hydrocarbons
d. Carbides
Answer- Hydrocarbons
Que- White coal is
a. Uranium
b. Hydro-electricity
c. Diamond
d. None of these
Answer- None of these
Que- Which of the following is used to iodise common salt ?
a. Potassium iodide
b. Iodine
c. Potassium iodate
d. Sodium iodide
Answer- Potassium iodate
Que- A thick paste of cement, sand and water is called
a. Concrete
b. R.C.C.
c. Mortar
d. Kiln
Answer- Mortar
Que- What is the most commonly used substance in fluorescent tubes?
a. Sodium oxide and argon
b. Sodium vapour and neon
c. Mercury vapour and argon
d. Mercury oxide and neon
Answer- Mercury vapour and argon
Que- Tear gas is :
a. Chloroprene
b. Carbonyl chloride
c. Nitrous oxide
d. Bleaching powder
Answer- Carbonyl chloride
Que- Tetra ethyle lead (TEL) is
a. A catalyst in burning fossil fuel
b. An antioxidant
c. A reductant
d. An antiknock compound
Answer- An antiknock compound
Que- The chief source for the production of nitrogeneous fertilizers is :
a. Ammonia
b. Nitric acid
c. Nitrogen
d. Nitrogen dioxide
Answer- Ammonia
Que- Which one of the following elements is used in the manufacture of safety matches?
a. Graphite
b. Phosphorus
c. Silicon
d. Sodium
Answer- Phosphorus
Que- Zinc sulphide is commonly used as
a. Fungicide
b. Herbicide
c. Rodenticide
d. Deodorant
Answer- Rodenticide
Que- Which halide is used in making sensitive emulsion on photograhic film?
a. Sodium chloride
b. Silver bromide
c. Silver iodide
d. Silver chloride
Answer- Silver bromide
Que- Detergents clean surfaces on the principle of
a. Viscosity
b. Surface tension
c. Elasticity
d. Floatation
Answer- Surface tension
Que- Which one of the following is not a characteristic feature of alloys?
a. Compounds
b. Mixtures
c. Solutions
d. Homogeneous systems
Answer- Homogeneous systems
Que- Galena is a mineral of
a. Iron
b. Gold
c. Lead
d. Calcium
Answer- Lead
Que- The iron ore which contains 72% of iron is :
a. Magnetite
b. Limonite
c. Haematite
d. Siderite
Answer- Magnetite
Que- Bauxite is an alloy of which of the following metals ?
a. Aluminium
b. Silver
c. Tin
d. Iron
Answer- Aluminium
Que- Hard steel contains
a. 2 to 5 per cent carbon
b. 0.5 to 1.5 per cent carbon
c. 0.1 to 0.4 per cent carbon
d. 0.01 to 0.04 per cent carbon
Answer- 0.5 to 1.5 per cent carbon
Que- Which of the following is not a greenhouse gas ?
a. Hydrogen
b. Carbon dioxide
c. Nitric oxide
d. Chlorofluorocarbon
Answer- Hydrogen
Que- Which is abundant in Gobar gas?
a. Carbon dioxide
b. Methane
c. Oxygen
d. Hydrogen
Answer- Methane
Que- Concentration of a material which is lethal to 50% animal is called
a. LD50
b. LC50
c. NOAEL
d. ADI
Answer- LD50
Que- The major harmful gas emitted by automobile vehicle which causes air pollution is
a. Carbon Monoxide
b. Methane
c. Carbon dioxide
d. Ozone gas
Answer- Carbon Monoxide
Que- The major harmful gas emitted by automobile vehicles which causes air pollution is
a. Carbon Monoxide
b. Methane
c. Carbon dioxide
d. Ozone gas
Answer- Carbon Monoxide
Que- The element which is used for vulcanizing rubber
a. Sulphur
b. Bromine
c. Silicon
d. Phosphorus
Answer- Sulphur
Que- Chemically ‘Quick Silver' is known as
a. Mercury
b. Silver
c. Aluminium
d. Copper
Answer- Mercury
Que- The weight of 6.023 × 1023 atoms of carbon is
a. 12 gms
b. 120 gms
c. 1.2 gms
d. 0.12 gms
Answer- 12 gms
Que- If there is one million Mg2+ ions in MgCl2, how many chloride ions are there?
a. Two million
b. One million
c. Half a million
d. Ten million
Answer- Two million
Que- What is the mass percentage of carbon in carbon dioxide (CO2)?
a. 15.8 %
b. 20.1 %
c. 27.3 %
d. 32.3 %
Answer- 27.3 %
Que- Chemical name of bleaching powder is :
a. Calcium chlorate
b. Calcium hypochlorite
c. Calcium chloro hypochlorite
d. Calcium bi chloride
Answer- Calcium hypochlorite
Que- The chemical formula of the laughing gas is
a. NO
b. N2O
c. NO2
d. N2O3
Answer- N2O
Que- The common name for the compound having formal NaOH is
a. Caustic soda
b. Caustic potash
c. Soda ash
d. Sodium hydroxide
Answer- Caustic soda
Que- Philosopher’s wool is chemically
a. Aluminium oxide
b. Magnesium oxide
c. Zinc oxide
d. Calcium oxide
Answer- Zinc oxide
Que- What is the atomic number of Oxygen?
a. 5
b. 8
c. 12
d. 22
Answer- 8
Que- Which one of the following metals pollutes the air of a city having large number of automobiles?
a. Cadmium
b. Chromium
c. Lead
d. Copper
Answer- Lead
Que- Pollutant from motor car exhaust that causes mental disease is
a. Lead
b. NO2
c. SO2
d. Hg
Answer- Lead
Que- The most common cause of pollution of air is
a. Carbon dioxide
b. Carbon monoxide
c. Sulphur dioxide
d. Smoke
Answer- Sulphur dioxide
Que- Particulates (< 1 µm size) remaining suspended in air indefinitely and transported by wind currents are called
a. Mists
b. Fumes
c. Aerosols
d. Smoke
Answer- Aerosols
Que- Mercury is emitted into air by
a. Burning coal
b. Burning garbage
c. Coal fire
d. Steam engine
Answer- Burning garbage
Que- Iron and manganese present as pollutants in water cannot be removed by________
a. Oxidation followed by settling and filtration
b. Chlorination
c. Ion exchange process
d. Lime soda process or manganese zeolite process
Answer- Chlorination
Que- Table salt gets moist during rainy season because
a. Sodium chloride is hygroscopic
b. Sodium chloride is deliquescent
c. Sodium chloride contains some quantity of sodium iodide
d. Sodium chloride contains hygroscopic impurities like magnesium chloride
Answer- Sodium chloride contains hygroscopic impurities like magnesium chloride
Que- The unit to measure the flow of water is
a. Micro Mho
b. Ohm meter
c. Milli curie
d. Cusecs
Answer- Cusecs
Que- When water itself combines chemically with some element or mineral it is called
a. Carbonation
b. Desilication
c. Hydration
d. Oxidation
Answer- Hydration
Que- Sea water is saltier than rain water because
a. Sea animals are salt producing
b. The air around the sea is saltish
c. Rivers wash away salts from earth and pour them into the sea
d. Sea beds have salt producing mines
Answer- Rivers wash away salts from earth and pour them into the sea
Que- Spirit in contact with body gives cool sensation because it is :
a. Liquid
b. Transparent
c. Highly volatile
d. A good conductor
Answer- Highly volatile
Que- Which one is a sublime substance?
a. Table salt
b. Sugar
c. Iodine
d. Potassium Iodide
Answer- Iodine
Que- The biogas used for cooking is a mixture of which of the following?
a. Carbon dioxide and oxygen
b. Isobutane and propane
c. Methane and carbon monoxide
d. Methane and carbon dioxide
Answer- Methane and carbon dioxide
Que- The major constituent of gobar gas is
a. Carbon dioxide
b. Methane
c. Butane
d. Isobutane
Answer- Methane
Que- ________ is a by product of sewage treatment and can be decomposed to produce biogas
a. Sewage
b. Sludge
c. Sewer
d. Scum
Answer- Sludge
Que- The metal does not give H2 on treatment with dilute HCL is
a. Zn
b. Fe
c. Ag
d. Ca
Answer- Ag
Que- The number of g-molecule of oxygen in 6.02 x 1024 CO molecules is
a. 1 gram of molecule
b. 0.5 gram of molecule
c. 5 gram of molecule
d. 10 gram of molecule
Answer- 5 gram of molecule
Que- The most extensive, commercially useful source of thorium as monazite sand occurs in India at
a. Orissa coast
b. Travancore coast
c. West Bengal coast
d. Gujarat coast
Answer- Travancore coast
Que- The main active constituent of tea and coffee is
a. nicotine
b. chlorophyll
c. caffeine
d. aspirin
Answer- caffeine
Que- The maximum number of isomers for an alkene with molecular formula C4H8 is
a. 5
b. 4
c. 2
d. 3
Answer- 4
Que- The first metal used by man was
a. iron
b. copper
c. gold
d. bronze
Answer- copper
Que- The hydronium ion is
a. H+
b. HO -
c. H2+
d. H3O+
Answer- H3O+
Que- The most electropositive elements among the following is
a. Na
b. Ca
c. K
d. Cs
Answer- Cs
Que- The method that cannot be used for removing permanent hardness of water is
a. adding sodium carbonate
b. distillation
c. adding caustic soda
d. boiling
Answer- boiling
Que- The following are the half lives of four active isotopes. Which one of the following is the most dangerous to handle?
a. 3 billion years
b. 100 years
c. 0.01 minute
d. 13 days
Answer- 0.01 minute
Que- Which one is a soluble salt in H2O?
a. CuS
b. Zn(OH)2
c. CaCl2
d. PbCl2
Answer- CaCl2
Que- Vinegar is ________ .
a. Diluted acetic acid
b. Glacial acetic acid
c. Glacial formic acid
d. Diluted formic acid
Answer- Diluted formic acid
Que- pH value between 6.5-7.5 makes the soil
a. Basic
b. Neutral
c. Acidic
d. None of these
Answer- None of these
Que- A pungent smell often present near the urinals is due to
a. Sulphur dioxide
b. Chlorine
c. Ammonia
d. Urea
Answer- Ammonia
Que- Ammonial is a mixture of
a. Aluminium powder and ammonium nitrate
b. Aluminium powder and ammonium chloride
c. Aluminium powder and ammonium sulphate
d. Aluminium powder and potassium nitrate
Answer- Aluminium powder and ammonium nitrate
Que- The heat value of combustion of Gasoline is
a. 12600 kJ/kg
b. 14600 kJ/kg
c. 39400 kJ/kg
d. 47000 kJ/kg
Answer- 47000 kJ/kg
Que- Which one of the following gases has the highest calorific value?
a. Natural gas
b. Water gas
c. Coal gas
d. Indane gas
Answer- Indane gas
Que- When a metal is heated in a flame, the electrons absorb energy and jump to higher energy state. On coming back to the lower energy siate, they emit light, which we can observe in
a. Raman spectra
b. Absorption spectra
c. Emission spectra
d. Fluorescence
Answer- Emission spectra
Que- If the equilibrium constants for the systems H2 + I2 -> 2HI and 2HI -> H2 + I2 are K1 and K2 respectively, the relationship between K1 and K2 is :
a. K1 = K2
b. K1 = 2K2
c. K1 = K2/2
d. K1= 1/K2
Answer- K1= 1/K2
Que- The influence of temperature on reaction rate is predicted by
a. Van der Waals equation
b. Kirchhoff's equation
c. Arrhenius equation
d. Lewis equation
Answer- Arrhenius equation
Que- An example of heterocyclic compound is
a. Naphthalene
b. Furan
c. Benzene
d. Anthracene
Answer- Furan
Que- In organic compounds, nitrogen is estimated by
a. Carius method
b. Victor-Meyer's method
c. Liebig's method
d. Dumas method
Answer- Dumas method
Que- Heavy metals got their name because compared to other atoms they have
a. Higher densities
b. Higher atomic masses
c. Higher atomic numbers
d. Higher atomic radii
Answer- Higher atomic masses
Que- Which one of the following elements exhibits the greatest tendency to lose electrons ?
a. Fluorine
b. Lithium
c. Oxygen
d. Zinc
Answer- Lithium