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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