Que- In galvanization, iron is coated with
a. Copper
b. Zinc
c. Tin
d. Nickel
Answer- Zinc
Que- The process of improving the quality of rubber by heating it with sulphur is called
a. Vulcanization
b. Acceleration
c. Sulphonation
d. Galvanization
Answer- Vulcanization
Que- Which one among the following is not a mixture?
a. Graphite
b. Glass
c. Brass
d. Steel
Answer- Graphite
Que- The gas used to dilute oxygen for breathing by deep sea divers is:
a. Neon
b. Argon
c. Nitrogen
d. Helium
Answer- Helium
Que- The most abundant element in the human body is
a. Carbon
b. Iron
c. Nitrogen
d. Oxygen
Answer- Oxygen
Que- The most abundant element in the earth’s atmosphere is
a. Argon
b. Nitrogen
c. Oxygen
d. Krypton
Answer- Nitrogen
Que- Select the one which is not a mixture :
a. Air
b. Gasoline
c. LPG
d. Distilled water
Answer- Distilled water
Que- Which of these acids is not organic in origin?
a. Lactic acid
b. Sulphuric acid
c. Citric acid
d. Oxalic acid
Answer- Sulphuric acid
Que- Match the sourc in Column B with the product of Column A. (Product) Column B (Source)A. Formic acid1. LemonB. Citric acid 2. TamarindC. Tartaric acid3. Ants
a. A B C3 2 1
b. A B C3 1 2
c. A B C2 3 1
d. A B C2 1 3
Answer- A B C3 1 2
Que- Saline soil contains
a. High concentration of salt
b. Lot of moisture
c. Hard rocks
d. None of the above
Answer- High concentration of salt
Que- Sour milk contains
a. Acetic acid
b. Tartaric acid
c. Citric acid
d. Lactic acid
Answer- Lactic acid
Que- Basicity of boric acid, H3BO3 is
a. 2
b. 3
c. 4
d. 5
Answer- 2
Que- The substance which does not expand on going from liquid state to solid state is
a. Water
b. Cast-iron
c. Aluminium
d. Type metal
Answer- Type metal
Que- Glycol is added to aviation gasoline because it
a. Reduces evaporation of petrol
b. Increases efficiency of petrol
c. Prevents freezing of petrol
d. Reduces consumption of petrol
Answer- Prevents freezing of petrol
Que- Which is the heaviest metal among the following?
a. Gold
b. Silver
c. Iron
d. Copper
Answer- Gold
Que- The wire of flash bulbs is made up of
a. Mg
b. Ba
c. Cu
d. Ag
Answer- Mg
Que- Which among the following is found in chlorophyll ?
a. Ca2+
b. Mg2+
c. Fe2+
d. Al3+
Answer- Mg2+
Que- Copper substances when exposed to air gains a green coating due to the formation of:
a. CuO
b. CuCO3 Cu(OH)2
c. CuSO4
d. Cu(NO3)2
Answer- CuCO3 Cu(OH)2
Que- Browning of paper in old books is caused by
a. Frequent use
b. Lack of aeration
c. Collection of dust
d. Oxidation of cellulose
Answer- Oxidation of cellulose
Que- Catalyst is a substance which
a. Increases the rate of the reaction
b. Decreases the rate of reaction
c. Has no action on the rate of the reaction
d. None of these
Answer- None of these
Que- When quick lime is added to water
a. Heat is liberated
b. Heat is absorbed
c. Temperature decreases
d. No heat change takes place
Answer- Heat is liberated
Que- What is the element that is in the highest percentage in the composition of the earth ?
a. Silicon
b. Oxygen
c. Magnesium
d. Iron
Answer- Oxygen
Que- The structure of (HPO3)3 is
a. Linear
b. Tetrahedral
c. Cyclic
d. Octahedral
Answer- Cyclic
Que- Spontaneous change is one in which there is:
a. A lowering of entropy
b. A lowering of free energy
c. Increase in free energy
d. An increase in Internal energy
Answer- A lowering of free energy
Que- Which of the following kinds of spectroscopy can provide information on the energy difference between the initial and final states rather the energy levels involved in the transition?
a. UV absorption spectroscopy
b. UV photoelectron spectroscopy
c. Infrared absorption spectroscopy
d. Rotational spectroscopy
Answer- UV photoelectron spectroscopy
Que- When ice cubes are made, the entropy of water
a. Does not change
b. Decreases
c. Increases
d. May either increase or decrease depending on the process used
Answer- Decreases
Que- Warming ammonium chloride with sodium hydrochloride in a test tube is an example of
a. Open system
b. Closed system
c. Isobaric system
d. Isothermal system
Answer- Open system
Que- Which of the following partially miscible liquid pairs has both lower and upper critical solution temperature?
a. Water and Phenol
b. Aniline and n-hexane
c. Glycerine and m-toluene
d. Water and diethyl aniline
Answer- Glycerine and m-toluene
Que- The aprotic solvent is
a. H2O
b. C6H6
c. HF
d. NH3
Answer- HF
Que- Which of the following has the highest lattice energy?
a. KF
b. CsF
c. NaF
d. RbF
Answer- NaF
Que- Which of the following substance is highly plastic ?
a. Quartz
b. Mica
c. Granite
d. Clay
Answer- Clay
Que- Soldering of two metals is possible because of the property of :
a. Viscosity
b. Osmosis
c. Cohesion
d. Surface tension
Answer- Cohesion
Que- Which of the following elements is not present in stainless steel?
a. Iron
b. Tungsten
c. Chromium
d. Nickel
Answer- Tungsten
Que- Which one of the following minerals is found in pure form?
a. Iron
b. Copper
c. Bauxite
d. Manganese
Answer- Copper
Que- What is the principal ore of aluminium ?
a. Dolomite
b. Copper
c. Lignite
d. Bauxite
Answer- Bauxite
Que- Burning pyrites ore gives out
a. Carbon dioxide gas
b. Sulphur dioxide gas
c. Nitrogen dioxide gas
d. Nitric oxide gas
Answer- Sulphur dioxide gas
Que- Which one of the following pairs is not correctly matched?
a. Haematite : Copper
b. Bauxite : Aluminium
c. Monazite : Thorium
d. Pitchblende : Uranium
Answer- Haematite : Copper
Que- The substance most commonly used as a food preservative is
a. Sodium carbonate
b. Tartaric acid
c. Acetic acid
d. Sodium salt of benzoic acid
Answer- Sodium salt of benzoic acid
Que- Curd is sour due to presence of
a. Tartaric acid
b. Lactic acid
c. Acetic acid
d. Oxalic acid
Answer- Lactic acid
Que- Drinking soda is
a. Alkaline
b. Acidic
c. Neutral
d. Oxidant
Answer- Acidic
Que- Which of the following has pH value 7?
a. Pure Water
b. H2SO4
c. Sodium Carbonate
d. HCl
Answer- Pure Water
Que- Muscle fatigue is caused by the accumulation of :
a. Pyruvic acid
b. Lactic acid
c. Oxalacetic acid
d. Uric acid
Answer- Lactic acid
Que- The main buffer system of the human blood is
a. H2CO3 - HCO3
b. H2CO3 - CO32-
c. CH3COOH - CH3COO-
d. NH2CONH2 - NH2CONH+
Answer- H2CO3 - HCO3
Que- The gas present in the stratosphere which filters out some of the sun's ultraviolet light and provides an effective shield against radiation damage to living things is
a. helium
b. ozone
c. oxygen
d. methane
Answer- ozone
Que- The most commonly used bleaching agent is
a. alcohol
b. carbon dioxide
c. chlorine
d. sodium chlorine
Answer- chlorine
Que- The nucleus of a hydrogen atom consists of
a. 1 proton only
b. 1 proton + 2 neutron
c. 1 neutron only
d. 1 electron only
Answer- 1 proton only
Que- The heat required to raise the temperature of body by 1 K is called
a. specific heat
b. thermal capacity
c. water equivalent
d. None of the above
Answer- thermal capacity
Que- The gas produced in marshy places due to decomposition of vegetation is
a. Carbon monoxide
b. Carbon dioxide
c. Sulphur dioxide
d. Methane
Answer- Methane
Que- Organic compounds are
a. Covalent compounds
b. Ionic compounds
c. Co-ordination compounds
d. Interstitial compounds
Answer- Covalent compounds
Que- Vinegar is an aqueous solution of
a. Oxalic acid
b. Citric acid
c. Hydrochloric acid
d. Acetic acid
Answer- Acetic acid
Que- Two elements which can form a large number of compounds are
a. Carbon and Hydrogen
b. Carbon and Nitrogen
c. Carbon and Oxygen
d. Carbon and Sulphur
Answer- Carbon and Hydrogen
Que- Alcoholic (– OH) group can be identified by :
a. Tollen's Reagent Test
b. Esterification Test
c. FeCl3Test
d. Ozonolysis Reaction
Answer- FeCl3Test
Que- Which of the following vitamins is generally excreted by human in urine?
a. Vitamin B
b. Vitamin C
c. Vitamin D
d. None of these
Answer- None of these
Que- The presence of Cobalt in Vitamin B12 was established for the first time by
a. Hydrolysis test
b. Spectroscopy
c. Borax-Bead test
d. Sodium Nitroprusside test
Answer- Spectroscopy
Que- What is the second largest component in milk ?
a. Fat
b. Minerals
c. Water
d. Sugar
Answer- Fat
Que- Which among the following is a carbohydrate ?
a. Nylon
b. Cane-sugar
c. Turpentine
d. Hydrogen peroxide
Answer- Cane-sugar
Que- How many atoms of oxygen are in a glucose molecule?
a. 3
b. 4
c. 6
d. 10
Answer- 6
Que- The common name of sodium bicarbonate is
a. Soda ash
b. Baking soda
c. Soda lime
d. Baking powder
Answer- Baking soda
Que- Which among the following stage is suitable indicator when solution of sodium carbonate is mixed with sulphuric acid ?
a. Methylene blue
b. Methyl red
c. Phenolphthaline
d. Methyl orange
Answer- Methyl orange
Que- Alum stops bleeding in minor cuts because of
a. Solvation
b. Emulsion
c. Dialysis
d. Coagulation
Answer- Coagulation
Que- The chemical name of 'Hypo' commonly used in photography is
a. Sodium thiosulphate
b. Silver nitrate
c. Sodium nitrate
d. Silver iodide
Answer- Sodium thiosulphate
Que- Interveinal necrotic spots on leaves appear due to
a. HF injury
b. SO2 injury
c. NO2 injury
d. O3 injury
Answer- SO2 injury
Que- The gas used for artificial fruit ripening of green fruit is –
a. Ethylene
b. Acetylene
c. Ethane
d. Methane
Answer- Ethylene
Que- The natural source of hydrocarbon is
a. Crude oil
b. Biomass
c. Coal
d. Carbohydrates
Answer- Crude oil
Que- By which organic compound all the oils are known ?
a. Carbohydrate
b. Protein
c. Hydrocarbon
d. Ester
Answer- Hydrocarbon
Que- Which of the following elements is found in all organic compounds?
a. Carbon
b. Calcium
c. Nitrogen
d. Oxygen
Answer- Carbon
Que- Ethanol containing 5% water is known as :
a. Dilute alcohol
b. Power alcohol
c. Rectified spirit
d. Absolute alcohol
Answer- Rectified spirit
Que- An alloy used in making heating elements for electric heating device is
a. Solder
b. Alloy Steel
c. Nichrome
d. German Silver
Answer- Nichrome
Que- Which of the following is an iron ore ?
a. Bauxite
b. Magnetite
c. Lignite
d. Nitrite
Answer- Magnetite
Que- The important metal used with iron to produce stainless steel is
a. Aluminium
b. Chromium
c. Tin
d. Carbon
Answer- Chromium
Que- Which of the following metals form an amalgam with other metals ?
a. Lead
b. Tin
c. Zinc
d. Mercury
Answer- Mercury
Que- ________ gives hardness to stainless steel.
a. Zinc
b. Lead
c. Carbon
d. Tin
Answer- Carbon
Que- When conc. H2SO4 is added to dry KNO3, brown fumes are evolved. These fumes are due to
a. SO3
b. SO2
c. NO2
d. N2O
Answer- NO2
Que- Wax used for making candle is chemically a mixture of
a. Aliphatic hydrocarbons
b. Aromatic hydrocarbons
c. Cyclic hydrocarbons
d. Aliphatic and aromatic hydrocarbons
Answer- Aliphatic hydrocarbons
Que- Adding Cl2 to benzene in the presence of AlCl3 is an example of :
a. Elimination reaction
b. Substitution reaction
c. None of the options
d. Addition reaction
Answer- Substitution reaction
Que- Benzene cannot undergo :
a. Substitution
b. Addition
c. Elimination
d. Oxidation
Answer- Elimination
Que- Which one is the simplest aromatic hydrocarbon?
a. Aspirin
b. Benzene
c. Chloride
d. Picric acid
Answer- Benzene
Que- Rock salt is a mineral containing
a. Potassium
b. Magnesium
c. Sodium
d. Iron
Answer- Sodium
Que- Baking soda is :
a. Potassium carbonate
b. Sodium hydroxide
c. Sodium carbonate
d. Sodium bicarbonate
Answer- Sodium bicarbonate
Que- Sodium Carbonate is commonly known as
a. Baking Soda
b. Washing Soda
c. Caustic Soda
d. Caustic Potash
Answer- Washing Soda
Que- Brine refers to :
a. Salt water
b. Sweet water
c. Pure water
d. Starch water
Answer- Salt water
Que- The chemical name of baking soda is
a. Sodium carbonate
b. Sodium bicarbonate
c. Sodium chloride
d. Sodium nitrate
Answer- Sodium bicarbonate
Que- Which one of the following group of gases contributes to the 'Green House Effect'?
a. Carbon dioxide and Methane
b. Ammonia and Ozone
c. Carbon monoxide and Sulphur dioxide
d. Carbon tetraflouride and Nitrous oxide
Answer- Carbon dioxide and Methane
Que- Black lung disease occurs in people working in
a. Electroplating industry
b. Organic solvents industry
c. Paint manufacturing industry
d. Coal mines
Answer- Coal mines
Que- The least preferred technique in the disposal of Municipal Solid Waste is
a. Incineration
b. Composting
c. Land filling
d. Bricketting
Answer- Bricketting
Que- Which one of the following was used as a chemical weapon in the first world war ?
a. Carbon monoxide
b. Hydrogen cyanide
c. Mustard gas
d. Water gas
Answer- Mustard gas
Que- The depletion of ozone layer is due to
a. Chlorofluorocarbons
b. Carbon dioxide
c. Sulphur dioxide
d. Ethane
Answer- Chlorofluorocarbons
Que- Sour taste of lemon is due to the presence of which of the following ?
a. Citric acid
b. Acetic acid
c. Oxalic acid
d. Formic acid
Answer- Citric acid
Que- pH scale ranges from
a. 0 – 7
b. 8 – 14
c. 0 – 14
d. None
Answer- 0 – 14
Que- Normal rainwater has a pH level of
a. 3.2
b. 5.6
c. 6.3
d. 8.3
Answer- 5.6
Que- Which one of the following is used as preservative for foodstuff ?
a. Sodium Benzoate
b. Picric acid
c. Glycerine
d. Sodium Chloride
Answer- Sodium Benzoate
Que- The acid which fails to liberate carbon dioxide from sodium bicarbonate is :
a. Acetic acid
b. Formic acid
c. Carbonic acid
d. Sulphuric acid
Answer- Sulphuric acid
Que- Which of the following chemical materials is responsible for the depletion of ozone layer in the atmosphere ?
a. Nitrous oxide
b. Carbon dioxide
c. Chlorofluorocarbon
d. Sulphur dioxide
Answer- Chlorofluorocarbon
Que- Nitrogen fixation is a process of
a. Assimilation of nitrate
b. Utilisation of nitrogen gas
c. Conversion of organic nitrogen to proteins
d. Conversion of molecular nitrogen to ammonia
Answer- Conversion of molecular nitrogen to ammonia
Que- Greenhouse effect is caused by
a. Nitrogen
b. Carbon dioxide
c. Carbon monoxide
d. Nitrogen dioxide
Answer- Carbon dioxide
Que- The lowest layer of earth's atmosphere is
a. Troposphere
b. Stratosphere
c. Mesosphere
d. Ionosphere
Answer- Troposphere
Que- Earth’s atmosphere is an envelope of gases extending to a height of
a. 100 km
b. 150 km
c. 200 km
d. 300 km
Answer- 200 km
Que- The human body is made up of several chemical elements; the element present in the highest proportion (65%) in the body is
a. carbon
b. hydrogen
c. oxygen
d. nitrogen
Answer- oxygen
Que- The isomerism which exists between CH3CHCI2 and CH2CI. CH2CI is
a. chain isomerism
b. functional group isomerism
c. positional isomerism
d. metamerism
Answer- positional isomerism
Que- The half life period of an isotope is 2 hours. After 6 hours what fraction of the initial quantity of the isotope will be left behind?
a. 1/6
b. 1/3
c. 1/8
d. 1/4
Answer- 1/8