Que- Solder is an alloy of
a. Tin and lead
b. Tin and copper
c. Tin, copper and zinc
d. Tin, lead and zinc
Answer- Tin and lead
Que- Solder metal is an alloy of
a. Lead and tin
b. Lead and antimony
c. Copper and zinc
d. Copper and tin
Answer- Lead and tin
Que- The lightest gas which is non-inflammable is
a. Hydrogen
b. Helium
c. Oxygen
d. Nitrogen
Answer- Helium
Que- Preparation of ‘Dalda or Vanaspati’ ghee from vegetable oil utilizes the following process :
a. Hydrolysis
b. Oxidation
c. Hydrogenation
d. Ozonolysis
Answer- Hydrogenation
Que- Which among the following is pure matter ?
a. Carbon dioxide
b. Brass
c. Air
d. Iron
Answer- Carbon dioxide
Que- The National Chemical Laboratory (India) is located in
a. Mumbai
b. Bangaluru
c. Hyderabad
d. Pune
Answer- Pune
Que- Who is known as the 'father of modern chemistry'?
a. John Dalton
b. Robert Boyle
c. Antoine Lavoisier
d. Democritus
Answer- Antoine Lavoisier
Que- Ozone depletion in the atmosphere is mainly caused by
a. Sulphur dioxide
b. Nitrogen dioxide
c. Hydrogen sulphide
d. Chlorofluorocarbon
Answer- Chlorofluorocarbon
Que- Ozone depletion in the stratosphere is mainly caused by
a. SO2
b. NO2
c. NO
d. Chlorofluorocarbons
Answer- Chlorofluorocarbons
Que- Which of the following is not a gaseous air pollutant?
a. Oxides of nitrogen
b. Hydrocarbon
c. Smoke
d. Oxides of sulphur
Answer- Hydrocarbon
Que- Which of the following is ozone depleting pesticide ?
a. D.D.T.
b. Benzene
c. Methyl bromide
d. Ethylene ozonide
Answer- Methyl bromide
Que- Threshold limit value of copper in the atmospheric air is
a. 0.001 mg/m3
b. 0.01 mg/m3
c. 1.0 mg/m3
d. 5.0 mg/m3
Answer- 1.0 mg/m3
Que- In which of the following states maximum iron ore is found ?
a. FeCO3
b. Fe2O3
c. Fe3O4
d. FeS2
Answer- Fe2O3
Que- Food cans are coated with tin and not with zinc because
a. Zinc is costlier than tin
b. Zinc has a higher melting point than tin
c. Zinc is more reactive than tin
d. Zinc is less reactive than tin
Answer- Zinc is more reactive than tin
Que- Cinnabar is an ore/mineral of
a. Lead
b. Manganese
c. Molybdenum
d. Mercury
Answer- Mercury
Que- The percentage of carbon in cast iron is :
a. 0.01 to 0.25
b. 0.5 to 1.5
c. 6 to 8
d. 3 to 5
Answer- 3 to 5
Que- Brass is a solution of molten copper in
a. Solid zinc
b. Molten zinc
c. Gaseous zinc
d. Molten tin
Answer- Molten zinc
Que- Which one is the simplest form of alkane?
a. Propane
b. Butane
c. Methane
d. Decane
Answer- Methane
Que- Which of the following is not a natural source of hydrocarbon?
a. Natural Gas
b. Coal
c. Petroleum
d. Mica
Answer- Mica
Que- The element with highest first ionisation energy is
a. Hydrogen
b. Helium
c. Lithium
d. Sodium
Answer- Helium
Que- In a period from Li to F, ionisation potential
a. Cannot be predicted
b. Increases
c. Decreases
d. Remains same
Answer- Cannot be predicted
Que- In the periodic table of elements, on moving from left to right across a period, the atomic radius
a. Decreases
b. Increases
c. Remains unchanged
d. Does not follow a definite pattern
Answer- Decreases
Que- The chief constituent of vinegar is
a. Formic acid
b. Acetic acid
c. Salycylic acid
d. Oxalic acid
Answer- Acetic acid
Que- Vinegar made by fermentation from cane sugar contains
a. Palmitic acid
b. Lactic acid
c. Citric acid
d. Acetic acid
Answer- Acetic acid
Que- Which one of the following is found in Vinegar ?
a. Acetic acid
b. Propionic acid
c. Formic acid
d. Butyric acid
Answer- Acetic acid
Que- Which of the following is not a derivative of barbituric acid?
a. Nembutal
b. Amytal
c. Veronal
d. Equanil
Answer- Equanil
Que- Which of the following substance's smell is similar to Ethanoic acid?
a. Tomato juice
b. Kerosene
c. Vinegar
d. Lemon
Answer- Vinegar
Que- High concentration hydrocarbon pollutants in atmospheric air causes
a. Cancer
b. Silicosis
c. Respiratory diseases (e.g.asthma)
d. Reduced crop yield
Answer- Cancer
Que- Which one is not a primary greenhouse gases in the Earth's atmosphere?
a. Carbon dioxide
b. Methane
c. Nitrogen
d. Ozone
Answer- Nitrogen
Que- Which of the following is secondary air pollutant ?
a. Photochemical smog
b. NO2
c. Dust particles
d. SO2
Answer- SO2
Que- Sullage water is –
a. Waste water released from kitchen
b. Waste water released from toilets
c. Waste water released from factories
d. Waste water released from hospitals
Answer- Waste water released from kitchen
Que- The gas liberated in the Bhopal gas tragedy was:
a. Pheynl isocynate
b. Acetylene
c. Ethylene
d. Methyl isocynate
Answer- Methyl isocynate
Que- Which one of the following elements is an example of noble gas ?
a. Nitrogen
b. Hydrogen
c. Chlorine
d. Helium
Answer- Helium
Que- Helium gas is filled in balloons because
a. Its atomic number is 2
b. It is lighter than air
c. It is one of the constitutents of water
d. It is a noble gas
Answer- It is lighter than air
Que- The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing is
a. Neon
b. Krypton
c. Argon
d. Helium
Answer- Helium
Que- At room temperature, the metal that remains liquid is:
a. Mercury
b. Platinum
c. Lead
d. Zinc
Answer- Mercury
Que- A metal is exposed to the atmosphere for sometime. It becomes coated with green carbonate. The metal must be
a. Silver
b. Copper
c. Aluminium
d. Zinc
Answer- Copper
Que- Which of the following is a natural polymer?
a. Bakelite
b. Nylon
c. Polythene
d. Starch
Answer- Starch
Que- Plastic is a type of
a. Polyester
b. Polymer
c. Acrylic
d. None of the above
Answer- Polymer
Que- Polythene is polymer of
a. Ethylene
b. Propylene
c. Acetylene
d. Aniline
Answer- Ethylene
Que- Glycol is used to manufacture which of the following ?
a. Nylon
b. Artificial silk
c. Terylene
d. Rubber
Answer- Terylene
Que- Silk fibre chemically is :
a. Carbohydrate
b. Fat
c. Protein
d. Cellulose
Answer- Protein
Que- The chemical used for cloud seeding for artificial rains is
a. Silver Nitrate
b. Potassium Bromide
c. Silver Iodide
d. Potassium Nitrate
Answer- Silver Iodide
Que- Which of the following is used as anesthetic ?
a. NH3
b. NO
c. NO2
d. N2O
Answer- NO
Que- Aspirin is chemically known as
a. Methyl salicylate
b. Hydroxysalicylate
c. Acetylsalicylic acid
d. Alkylsalicylic acid
Answer- Acetylsalicylic acid
Que- Gypsum is used for improvement of:
a. Alkaline soils
b. Saline soils
c. Podsols
d. Acidic soils
Answer- Saline soils
Que- Which of the following laser types is used in a laser printer?
a. Dye laser
b. Semiconductor laser
c. Excimer laser
d. Gas laser
Answer- Semiconductor laser
Que- 0.01 mole of NaOH is added to 10 liters of water. The pH of water changes by
a. 3
b. 4
c. 6
d. 7
Answer- 4
Que- Which of the following methods is used in determining the number average molar mass of a macromolecule?
a. Viscosity
b. Osmotic pressure
c. Sedimentation equilibrium
d. Light scattering
Answer- Osmotic pressure
Que- Molality of pure water is
a. 18.00
b. 1.80
c. 5.55
d. 55.5
Answer- 55.5
Que- A solution is
a. A homogeneous mixture of two or more substances
b. A solid dissolved in a liquid
c. A solid dissolved i water
d. A mixture of two liquids
Answer- A homogeneous mixture of two or more substances
Que- Which one is the most dense liquid from the below?
a. Water
b. Choloform
c. Gasolin
d. None of the above
Answer- Choloform
Que- Indane gas is mixture of
a. Butane and hydrogen
b. Butane and oxygen
c. Butane and propane
d. Methane and oxygen
Answer- Butane and propane
Que- The charcoal used to decolourise brown sugar solution is
a. Wood charcoal
b. Coconut charcoal
c. Animal charcoal
d. Sugar charcoal
Answer- Animal charcoal
Que- The major component in the LPG is
a. Methane
b. Butane
c. Ethane
d. Propane
Answer- Butane
Que- Domestic cooking gas consists mostly of
a. Methane and ethane
b. Liquified butane and isobutane
c. Hydrogen and acetylene
d. Ethylene and carbon monoxide
Answer- Liquified butane and isobutane
Que- Which one of the following is known as the 'brown coal'?
a. Anthracite
b. Bituminous
c. Coke
d. Lignite
Answer- Lignite
Que- Which among the following is not a characteristic of transition metals?
a. Tendency to gain electrons
b. Low electronegativity
c. Low ionization energy
d. Malleability
Answer- Tendency to gain electrons
Que- The most electronegative element among the following is
a. Fluorine
b. Sodium
c. Chlorine
d. Oxygen
Answer- Fluorine
Que- Total number of halogen elements found in the periodic table is
a. 3
b. 5
c. 8
d. 13
Answer- 5
Que- Ionisation energy of nitrogen is greater than that of oxygen because nitrogen has
a. High bond dissociation energy
b. Smaller atomic radius
c. Stable half filled 2p sub level
d. High nuclear charge
Answer- Stable half filled 2p sub level
Que- The elements with atomic numbers 9, 17, 35, 53, 85 are all
a. Heavy metals
b. Noble gases
c. Light metals
d. Halogens
Answer- Halogens
Que- Baryllium Sulphate is less soluble in water due to
a. High inflammable energy
b. Low Energy of dissociation
c. Low inflammable energy
d. Lonic band
Answer- High inflammable energy
Que- Chile saltpeter is the common name of:
a. Sodium nitrate
b. Potassium nitrite
c. Potassium nitrate
d. Sodium nitrite
Answer- Sodium nitrate
Que- Setting of plaster of paris involves
a. Dehydration process
b. Hydration to form other hydrates
c. Oxidation process
d. Reduction process
Answer- Hydration to form other hydrates
Que- Find the odd one:
a. Marble
b. Chalk
c. Limestone
d. Slaked lime
Answer- Slaked lime
Que- The chemical name of 'Plaster of Paris' commonly used for setting broken bones is
a. Calcium nitrate
b. Calcium sulphate
c. Calcium carbonate
d. Calcium chloride
Answer- Calcium sulphate
Que- Entropy of Universe is always
a. Decreasing
b. Zero
c. Constant
d. Increasing
Answer- Increasing
Que- In a reaction of the type A+B -> C+D one could ensure it to be a first order reaction by :
a. Increasing the temperature
b. Increasing the concentration of a product
c. Increasing the concentration of a reactant
d. Adding a catalyst
Answer- Increasing the concentration of a reactant
Que- Kinetics is the study of:
a. The rate of chemical reaction
b. How fast the reactions go
c. The mechanisms and paths of the molecules take in joining from one reactant to products
d. All of these are correct
Answer- All of these are correct
Que- Bhopal gas tragedy is associated with leakage of
a. Carbon dioxide
b. Nitrogen dioxide
c. Sulphur dioxide
d. Methyl isocyanate
Answer- Methyl isocyanate
Que- The function of sedimentation tank in sewage treatment is to:
a. Disinfect the sewage
b. Remove water content
c. Aerate the sewage
d. Remove suspended solids
Answer- Remove suspended solids
Que- During fermentation of sugar, the compound which is always formed is :
a. Methyl Alcohol
b. Ethyl Alcohol
c. Acetic Acid
d. Ethylene
Answer- Ethyl Alcohol
Que- If a buffer solution is diluted its pH
a. Is increased
b. Remains same
c. Is decreased
d. Will slowly increase and then it will decrease
Answer- Remains same
Que- 'Vinegar' is a commercial name of
a. Oxalic acid
b. Hydrochloric acid
c. Acetic acid
d. Citric acid
Answer- Acetic acid
Que- The apparatus used to test acidity of aqueous solution is
a. PH meter
b. Ammeter
c. Hygrometer
d. Acidmeter
Answer- PH meter
Que- Which one of the following organic compound is used to remove stains of iron compounds?
a. Oxalic acid
b. Benzoic acid
c. Phthalic acid
d. Cinnamic acid
Answer- Oxalic acid
Que- Atoms having the same number of protons but different number of neutrons are called :
a. Isotopes
b. Cations
c. Higgs-boson
d. Anions
Answer- Isotopes
Que- Chemical properties of isotopes
a. Must be same
b. Must be different
c. Need not be same
d. Need not be different
Answer- Must be same
Que- Which of the following does the nucleus of an atom consists of?
a. Protons and neutrons
b. Protons and electrons
c. Electrons
d. Protons
Answer- Protons and neutrons
Que- The nucleus of an atom consists of
a. Protons and Neutrons
b. Neutrons and Electrons
c. Electrons only
d. None of the above
Answer- Protons and Neutrons
Que- The mass number of a nucleus is
a. Always less than its atomic number
b. Always more than its atomic number
c. Always equal to its atomic number
d. Sometimes more and somtimes equal to its atomic number
Answer- Sometimes more and somtimes equal to its atomic number
Que- The chemical that is used to ripen mangoes is
a. Calcium sulphide
b. Calcium carbide
c. Calcium carbonate
d. Calcium chloride
Answer- Calcium carbide
Que- Exposure to mixtures of chemicals are greater than expected on the basis of effects of exposure to each chemical individually. This is known as
a. Additives
b. Antagonism
c. Synergism
d. Independent
Answer- Synergism
Que- Which of the following is used to remove ink and rust stains on cloth?
a. Oxalic acid
b. Alcohol
c. Ether
d. Kerosene oil
Answer- Oxalic acid
Que- KMnO4 can be used as a/an
a. Insecticide
b. Fertiliser
c. Pesticide
d. Disinfectant
Answer- Disinfectant
Que- The chemical name of 'laughing gas' is
a. Nitric oxide
b. Nitrogen dioxide
c. Nitrogen pentoxide
d. Nitrous oxide
Answer- Nitrous oxide
Que- Bleaching action of moist sulphur dioxide is because of its
a. Basic property
b. Acidic property
c. Oxidising property
d. Reducing property
Answer- Oxidising property
Que- Sulphur dioxide bleaches colouring matter by :
a. Reduction
b. Dehydration
c. Decomposition
d. Oxidation
Answer- Reduction
Que- Which one of the following is commonly used for pulp bleaching in the paper industry?
a. Mild sulphuric acid
b. Glucose isomerase
c. Hydrogen peroxide
d. Iodine and water
Answer- Hydrogen peroxide
Que- In upper layer of atmosphere ozone is formed by
a. The action of ultraviolet rays on oxygen
b. The combination of oxygen molecules
c. Subjecting oxygen to high pressure
d. The action of nitrogen on oxygen in atmosphere
Answer- The action of ultraviolet rays on oxygen
Que- Which one of the following is used to restore the colour of old oil paintings ?
a. Ozone
b. Hydrogen peroxide
c. Barium peroxide
d. Sodium peroxide
Answer- Hydrogen peroxide
Que- The metal used to galvanise iron to protect it from rusting is
a. Zinc
b. Chromium
c. Lead
d. Antimony
Answer- Zinc
Que- Iron is prevented from rusting by coating with zinc. This process is called as
a. Galvanisation
b. Corrosion
c. Sublimation
d. Reduction
Answer- Galvanisation
Que- An electric iron has a heating element made of :
a. Copper
b. Tungsten
c. Nichrome
d. Zinc
Answer- Nichrome
Que- The metal chiefly used for galvanising iron is :
a. Zinc
b. Mercury
c. Cadmium
d. Tin
Answer- Zinc
Que- The anode in a dry cell consists of
a. Copper
b. Zinc
c. Cadmium
d. Graphite
Answer- Zinc
Que- Stains of rust on clothes can be removed by :
a. Oxalic acid
b. Petrol
c. Alcohol
d. H2O2
Answer- Oxalic acid
Que- One of the constituents of tear gas is
a. Ethane
b. Ethanol
c. Ether
d. Chloropicrin
Answer- Chloropicrin
Que- The element used for making solar cells is
a. Magnesium
b. Sodium
c. Calcium
d. Silicon
Answer- Silicon