Chemistry MCQ (Multiple Choice Questions) - SchoolingAxis

Chemistry MCQ (Multiple Choice Questions)

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


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