Que- What particles move around the nucleus of an atom and are negatively charged?
a. Electrons
b. Protons
c. Positrons
d. Neutrons
Answer- Electrons
Que- All isotopes of the same element have ______________
a. Different atomic numbers and different atomic mass
b. Different atomic numbers and the same atomic mass
c. The same atomic number but different atomic masses
d. The same atomic number and the atomic mass
Answer- The same atomic number but different atomic masses
Que- Mercury is a :
a. Solid metal
b. Liquid metal
c. Solid non-metal
d. Liquid non-metal
Answer- Liquid metal
Que- The lustre of the metals is because of
a. High density, due to closed packing of atoms
b. High polish
c. Reflection of light due to the presence of free electrons
d. Absorption of light due to the presence of cavities
Answer- Reflection of light due to the presence of free electrons
Que- The non-metal found in the liquid state is
a. Bromine
b. Nitrogen
c. Fluorine
d. Chlorine
Answer- Bromine
Que- Which among the following is liquid non-metal ?
a. Mercury
b. Bromine
c. Water
d. Alcohol
Answer- Bromine
Que- Metal are good conductors, because
a. They contain free electrons
b. The molecules in them are very close to each other
c. The molecules in them collide very freely
d. They contain reflecting surface
Answer- They contain free electrons
Que- The element used in the manufacture of safety matches is
a. Phosphorous
b. Magnesium
c. Silicon
d. Sulphur
Answer- Phosphorous
Que- This group of alumino-silicate minerals is widely used in making electrical insulators
a. Bauxite
b. Chromite
c. Manganese
d. Mica
Answer- Mica
Que- Commercial Vaseline is derived from
a. Plant gums
b. Coal tar
c. Wool wax
d. Petroleum
Answer- Petroleum
Que- Alum is used as
a. An analgesic
b. A fertilizer
c. A disinfectant
d. A purifier for water
Answer- A purifier for water
Que- Antacid tablets consist of
a. Hydroxides of sodium, magnesium and aluminium
b. Hydroxides of magnesium and aluminium
c. Hydroxides of sodium and aluminium
d. Hydroxides of magnesium and sodium
Answer- Hydroxides of magnesium and aluminium
Que- The most important ore of lead is
a. Galena
b. Magnetite
c. Pyrolusite
d. Siderite
Answer- Galena
Que- Steel contains
a. 0.1 – 5% carbon
b. 5 – 10% carbon
c. More than 10% carbon
d. No carbon
Answer- 0.1 – 5% carbon
Que- Which is the purest commercial form of iron ?
a. Pig iron
b. Steel
c. Stainless steel
d. Wrought iron
Answer- Wrought iron
Que- The most abundant metal in the Earth’s crust is
a. Zinc
b. Copper
c. Aluminium
d. Iron
Answer- Aluminium
Que- The ore of Aluminium is
a. Fluorspar
b. Bauxite
c. Chalco pyrites
d. Hematite
Answer- Bauxite
Que- Carbon monoxide is an inflammable gas. Which one of the following is also inflammable?
a. Helium
b. Nitrogen
c. Oxygen
d. Hydrogen
Answer- Hydrogen
Que- When Hydrogen starts burning in air, it produces ?
a. Ammonia
b. Water
c. Methane
d. Carbonic Acid
Answer- Water
Que- The gas which turns into liquid at the lowest temperature among the following is
a. Hydrogen
b. Oxygen
c. Helium
d. Nitrogen
Answer- Hydrogen
Que- The gas that is used in the manufacture of vanaspati ghee is :
a. Oxygen
b. Carbon dioxide
c. Hydrogen
d. Nitrogen
Answer- Hydrogen
Que- Which one of the following metals does not react with water to produce Hydrogen ?
a. Potassium
b. Cadmium
c. Sodium
d. Lithium
Answer- Cadmium
Que- The name of unreactive gas is
a. Carbon dioxide
b. Hydrogen
c. Nitrogen
d. Oxygen
Answer- Nitrogen
Que- The green colour seen in firework displays is due to the chloride salt of :
a. Sodium
b. Strontium
c. Barium
d. Calcium
Answer- Barium
Que- In deep-sea diving, divers use a mixture of gases consisting of oxygen and
a. Hydrogen
b. Nitrogen
c. Argon
d. Helium
Answer- Nitrogen
Que- Now-a-days yellow lamps are frequently used as street lights. Which of the following gases is used in these lamps ?
a. Sodium
b. Neon
c. Hydrogen
d. Nitrogen
Answer- Sodium
Que- Which of the following is not soluble in water ?
a. Lead Sulphate
b. Zinc sulphate
c. Potassium sulphate
d. Sodium sulphate
Answer- Zinc sulphate
Que- The material used in the manufacture of lead pencil is
a. Graphite
b. Lead
c. Carbon
d. Mica
Answer- Graphite
Que- Water can be separated from alcohol water mixture by
a. Decantation
b. Evaporation
c. Distillation
d. Sublimation
Answer- Distillation
Que- In addition to hydrogen, the other abundant element present on Sun’s surface is
a. Helium
b. Neon
c. Argon
d. Oxygen
Answer- Helium
Que- The most abundant element by number in the living system is :
a. Nitrogen
b. Hydrogen
c. Oxygen
d. Carbon
Answer- Hydrogen
Que- What is the element required for solar energy conversion ?
a. Beryllium
b. Tantalum
c. Silicon
d. Ultra pure carbon
Answer- Silicon
Que- The mass number of a nucleus is
a. always less than its atomic number
b. the sum of the number of protons and neutrons present in the nucleus
c. always more than the atomic weight
d. a fraction
Answer- the sum of the number of protons and neutrons present in the nucleus
Que- The inexpensive and commonly used variety of glass is called soda glass. It is called so because
a. was used initially for making bottles of soda(carbonated drink)
b. is made using soda(sodium carbonate)
c. was initially used for storing sodium carbonate
d. is made using soda lime
Answer- is made using soda(sodium carbonate)
Que- The gas used in the manufacture of vanaspati from vegetable oil is
a. hydrogen
b. oxygen
c. nitrogen
d. carbon dioxide
Answer- hydrogen
Que- The ionic radii of N3-, O2-, F- and Na+ follows the order
a. N3- > O2- > F- > Na+
b. N3- > Na+ > O2- > F-
c. Na+ > O2- > N3- > F-
d. O2- > F- > Na+ > N3-
Answer- N3- > O2- > F- > Na+
Que- The graphite rods in the nuclear reactor
a. react with U to release energy
b. produce neutrons
c. undergo combustion which triggers the nuclear fission
d. convert fast moving neutrons into thermal neutrons
Answer- convert fast moving neutrons into thermal neutrons
Que- The new strain of bacteria produced by biotechnology in alcohol industry is
a. Escherichia coli
b. Saccharomyces cerevisiae
c. Bacillus subtilis
d. Pseudomonas putida
Answer- Pseudomonas putida
Que- Molasses a by-product in the manufacture of sugar, is converted into
a. Alcohol
b. Paper
c. Fuel
d. Pulp
Answer- Alcohol
Que- Denatured spirit is ethanol mixed with
a. Petrol
b. Kerosene
c. Water
d. Pyridine
Answer- Pyridine
Que- Rectified spirit is :
a. 95% ethyl alcohol
b. 100% ethyl alcohol
c. Methylated spirit
d. Tincture iodine
Answer- 95% ethyl alcohol
Que- The reaction intermediate formed during the preparation of diethyl ether from ethanol by treatment with H2SO4 is
a. Carbanion
b. Carbocation
c. Carbene
d. Free radical
Answer- Carbocation
Que- Which one of the following acids is used in battery ?
a. Hydrochloric acid
b. Hydrofluoric acid
c. Sulphuric acid
d. Sulphurous acid
Answer- Sulphuric acid
Que- Which of the following is the strongest base in aqueous solution ?
a. Diethylamine
b. Triethylamine
c. Ammonia
d. Ethylamine
Answer- Diethylamine
Que- Which of the following acids serves as an electrolyte in a lead storage battery?
a. Sulphuric acid
b. Lactic acid
c. Hydrochloric acid
d. Nitric acid
Answer- Sulphuric acid
Que- Which is known as carbolic acid?
a. Phenol
b. Ethanol
c. Acetic acid
d. Oxalic acid
Answer- Phenol
Que- Citric acid is present in free form in
a. Tamarind
b. Milk
c. Apple
d. Lemon
Answer- Lemon
Que- Depletion of ozone layer causes
a. Blood cancer
b. Lung cancer
c. Skin cancer
d. Breast cancer
Answer- Skin cancer
Que- Nitrification is the biological process of converting
a. N2 into nitrate
b. N2 into nitrite
c. Ammonia into nitrite
d. Ammonia into N2
Answer- Ammonia into nitrite
Que- Besides CO2, the other green house gas is
a. CH4
b. N2
c. Ar
d. O2
Answer- CH4
Que- The greenhouse effect is caused by the higher level of which gas in the atmosphere ?
a. Carbon monoxide
b. Carbon dioxide
c. Nitrous oxide
d. Sulphur dioxide
Answer- Carbon dioxide
Que- The atmospheric gas that is mainly responsible for green house effect :
a. Ozone
b. Nitrogen
c. Oxygen
d. Carbon dioxide
Answer- Carbon dioxide
Que- Wood spirit is
a. Methyl alcohol
b. Ethyl alcohol
c. Butyl alcohol
d. Propyl alcohol
Answer- Methyl alcohol
Que- When formaldehyde and potassium hydroxide are heated, we get
a. Acetylene
b. Methyl alcohol
c. Methane
d. Ethyl formate
Answer- Methyl alcohol
Que- Which of the following metals causes Itai-Itai disease ?
a. Cadmium
b. Chromium
c. Cobalt
d. Copper
Answer- Cadmium
Que- Which component referred to as 'Milk sugar'?
a. Lactose
b. Maltose
c. Galactose
d. Sucrose
Answer- Lactose
Que- Match the List-I with List-II and select the correct answer using the codes given belowList-I (Vitamin)List-II(Chemical compound)F.Vitamin A1.ThiaminG.Vitamin B12.RetinolH.Vitamin C3.Ascorbic acidJ.Vitamin E4.TocopherolCodes :FGHJA.4132B.2314C.4312D.2134
a. A
b. B
c. C
d. D
Answer- D
Que- The oil used in the froth floatation process is
a. coconut oil
b. olive oil
c. kerosene oil
d. pine oil
Answer- pine oil
Que- The number of waves in n x 10th Bohr's orbit are
a. n2
b. n
c. n-2
d. n3
Answer- n
Que- The mass of one Avogadro number of helium atom is
a. 1.00 gram
b. 4.00 gram
c. 8.00 gram
d. 4 x 6.02 x 1023 gram
Answer- 4 x 6.02 x 1023 gram
Que- The items amenable to detection by soft x-rays are
a. contrabands
b. lead in bullets
c. narcotics
d. genuine coins from counterfeit coins
Answer- genuine coins from counterfeit coins
Que- The material which can be deformed permanently by heat and pressure is called a
a. thermoplastic
b. thermoset
c. chemical compound
d. polymer
Answer- thermoset
Que- What is the mass percentage of oxygen in carbon dioxide (CO2)?
a. 30.5%
b. 50.9 %
c. 65.8 %
d. 72.7 %
Answer- 72.7 %
Que- Number of 6.023 × 1023 atoms present in one mole of a gas at STP is
a. 6.023 × 1020
b. 6.023 × 1023
c. 6.023 × 10–20
d. 6.023 × 10–23
Answer- 6.023 × 1023
Que- The percentage of nitrogen present in ammonium sulphate is :
a. 27%
b. 25%
c. 30.5%
d. 18%
Answer- 27%
Que- The value of Avogadro Number is
a. 6.023 × 1022
b. 6.023 × 1023
c. 6.023 × 1024
d. 6.023 × 1025
Answer- 6.023 × 1023
Que- Aqua regia is a 1 : 3 mixture, by volume, of
a. Conc. nitric acid and conc. hydrochloric acid
b. Conc. hydrochloric acid and conc. nitric acid
c. Conc. nitric acid and conc. sulphuric acid
d. Conc. sulphuric acid and conc. nitric acid
Answer- Conc. nitric acid and conc. hydrochloric acid
Que- Which of the following statements are correct about chloroform? a. Liquid fuel b. Anaesthetic in nature c. Produces phosgene d. Fire extinguisher
a. A, B
b. A, C
c. B, C
d. D, A
Answer- B, C
Que- Which of the following is an antidiabatic drug?
a. Insulin
b. Penicillin
c. Chloroquine
d. Aspirin
Answer- Insulin
Que- Tear gas used by the police to disperse the mob contains
a. Carbon dioxide
b. Chlorine
c. Ammonia
d. Hydrogen sulphide
Answer- Chlorine
Que- Which of the following is also used as a Bio fertilizer?
a. Urea
b. Ammonia
c. Uric Acid
d. None of these
Answer- None of these
Que- The advantage of detergents over soaps is
a. Detergents are soluble in water
b. Detergents could not give much lather
c. Detergents give lather even with hard water
d. Soaps give lather with only soft water
Answer- Detergents give lather even with hard water
Que- Which one of the following is an example of a gel ?
a. Cheese
b. Milk
c. Face cream
d. Shaving cream
Answer- Face cream
Que- A substance which readily forms colloidal solution in contact with water is called
a. Extrinsic colloid
b. Associated colloid
c. Hydrophobic colloid
d. Hydrophilic colloid
Answer- Hydrophilic colloid
Que- Peptization is a process of
a. Precipitation of colloidal particles
b. Purification of colloids
c. Protection of colloidal solution
d. Dispersing precipitates into colloidal solution
Answer- Dispersing precipitates into colloidal solution
Que- What do you understand by the term Espuma ?
a. Foam
b. Soap
c. Salt
d. Calcium
Answer- Foam
Que- Cloud is a colloidal dispersion of
a. Air in a dispersion medium of water
b. Fog in a dispersion medium of water
c. Mist in a dispersion medium of air
d. Water drops in a dispersion medium of air
Answer- Water drops in a dispersion medium of air
Que- Which gas does not form the part of atmosphere ?
a. Nitrogen
b. Helium
c. Chlorine
d. None of the above
Answer- Chlorine
Que- Which one of the following statement is correct ?Ozone is found in the earth's atmosphere mostly between
a. 5 and 10 km
b. 10 and 20 km
c. 20 and 50 km
d. 50 and 100 km
Answer- 20 and 50 km
Que- Which one of the following is not a ‘green house gas’ ?
a. Chlorofluorocarbons
b. Methane
c. Carbon dioxide
d. Nitrogen
Answer- Nitrogen
Que- Green house effect is accelerated by
a. Deforestation
b. Rapid industrialization
c. Increased transportation activity
d. All of these
Answer- All of these
Que- Smoke is formed due to
a. Solid dispersed in gas
b. Solid dispresed in liquid
c. Gas dispresed in solid
d. Gas dispersed in gas
Answer- Solid dispersed in gas
Que- The components of water can be separated by
a. Physical methods
b. Chemical methods
c. Both A and B
d. They can not be separated
Answer- Chemical methods
Que- Which of the following is not a chemical reaction?
a. Burning of paper
b. Digestion of food
c. Conversion of water into steam
d. Burning of coal
Answer- Conversion of water into steam
Que- Chemical formula of washing soda is
a. Na2SO4.10H2O
b. NaHCO3
c. Na2CO3.10H2O
d. Ca(OH)2
Answer- Na2CO3.10H2O
Que- What is the chemical name for ‘Baking Soda’ ?
a. Sodium carbonate
b. Sodium bicarbonate
c. Sodium nitrite
d. Sodium nitrate
Answer- Sodium bicarbonate
Que- The chemical name of ‘Common salt’ is
a. Sodium chloride
b. Sodium nitrate
c. Ammonium chloride
d. Calcium chloride
Answer- Sodium chloride
Que- When a lead storage battery is discharged,
a. SO2 is evolved
b. Lead sulphate is consumed
c. Lead is formed
d. Sulphuric acid is consumed
Answer- Sulphuric acid is consumed
Que- Which of the following pairs of materials serves as electrodes in rechargeable batteries commonly used in devices such as torch lights, electric shavers, etc. ?
a. Iron and cadmium
b. Nickel and cadmium
c. Lead peroxide and lead
d. Zinc and carbon
Answer- Nickel and cadmium
Que- In a Carbonyl group a carbon atom makes double bond with
a. Carbon
b. Oxygen
c. Hydrogen
d. None of the above
Answer- Oxygen
Que- Williamson's synthesis is widely used in the laboratory preparation of
a. Alcohols
b. Ethers
c. Aldehydes
d. Esters
Answer- Ethers
Que- German silver, an alloy, does not contain the metal
a. Nickel
b. Zinc
c. Copper
d. Silver
Answer- Silver
Que- Colour imparted to the Bunsen flame by strontium salt is
a. Bluish green
b. Apple-green
c. Brick red
d. Crimson red
Answer- Crimson red
Que- An oxidising agent is a
a. An electron acceptor
b. An electron donor
c. In a chemical reaction its oxidation number increases
d. It releases H2 in a chemical reaction
Answer- An electron acceptor
Que- Silver gets corroded due to ________ in air.
a. Oxygen
b. Hydrogen Sulphide
c. Carbon dioxide
d. Nitrogen
Answer- Hydrogen Sulphide
Que- Which of the following causes the rusting of iron? a. Oxidation b. Reduction c. Chemical reaction with oxygend. Chemical reaction with CO2
a. A and B
b. B and C
c. C and D
d. A and C
Answer- A and C
Que- Photo-oxidation process is initiated by
a. Light
b. Heat
c. Oxygen
d. Catalyst
Answer- Light
Que- Galvanised iron is made by coating iron with
a. Zinc
b. Nickel
c. Chromium
d. Sulphur
Answer- Zinc
Que- Slag is a name given for
a. Molten iron
b. Molten sand
c. Molten alumina
d. Molten calcium silicate
Answer- Molten alumina
Que- Solder is an alloy of
a. Lead, zinc
b. Copper, lead
c. Tin, lead
d. Sodium, lead
Answer- Tin, lead