Chemistry MCQ (Multiple Choice Questions) - SchoolingAxis

Chemistry MCQ (Multiple Choice Questions)

 Que- The polymerisation of which often following is used in manufacturing of polythene in industry ? 

a. Methane 

b. Styrene 

c. Acetylene 

d. Ethylene 


Answer- Ethylene


Que- Brass gets discoloured in air due to constant exposure in presence of: 

a. Aluminium phosphide 

b. Hydrogen sulphide 

c. Hydrogenated wafers 

d. Aluminium sulphide 


Answer- Hydrogen sulphide


Que- Which of the following is not present in German silver? 

a. Copper 

b. Nickel 

c. Silver 

d. Zinc 


Answer- Silver


Que- Haloarenes are more stable than haloalkanes due to 

a. Resonance effect 

b. Inductive effect 

c. Hyper conjugative effect 

d. All of them 


Answer- Resonance effect


Que- The unit of ionic product of water (Kw) is : 

a. Mol2 let-1 

b. Mol2 let-2 

c. Mol-1 let-2 

d. Mol-1 let-1 


Answer- Mol2 let-2


Que- Aluminium chloride is 

a. Bronsted Lowry Acid 

b. Arrhenius Acid 

c. Lewis Acid 

d. Lewis Base 


Answer- Lewis Acid


Que- Which of the following is not a method of preparing oxygen? 

a. Electrolysis of water 

b. Fractional distillation of liquid air 

c. Decomposition of potassium permanganate 

d. Decomposition of manganese dioxide 


Answer- Decomposition of manganese dioxide


Que- Which one of the following statements is not correct? Vulcanisation of rubber makes it 

a. Soft and flexible 

b. Strong and hard 

c. Chemical resistant 

d. Withstand higher temperatures 


Answer- Soft and flexible


Que- The compounds formed when hydrogen combines with p-block elements are called 

a. Ionic hydrides 

b. Molecular hydrides 

c. Metallic hydrides 

d. Polynuclear hydrides 


Answer- Molecular hydrides


Que- In vulcanisation process, rubber can be hardened by adding 

a. Nitrogen 

b. Silicon 

c. Sulphur 

d. Alcohol 


Answer- Sulphur


Que- The substance that is added to make natural rubber strong and more bouncy is 

a. Polythene 

b. Sponge 

c. Sulphur 

d. Chlorine 


Answer- Sulphur


Que- White phosphorus is always kept under 

a. Benzene 

b. Kerosene 

c. Ether 

d. Water 


Answer- Water


Que- Milk is a colloidal system in which: 

a. Water is dispersed in fat 

b. Fat is dispersed in water 

c. Fat and water are dispersed in each other 

d. Fat is dissolved 


Answer- Fat is dispersed in water


Que- An emulsion is a colloid of a 

a. Gas in a liquid 

b. Liquid in a liquid 

c. Liquid in a gas 

d. Gas in a solid 


Answer- Liquid in a liquid


Que- An emulsion is a colloidal solution of 

a. Liquid in liquid 

b. Solid in liquid 

c. Gas in solid 

d. Solid in Solid 


Answer- Liquid in liquid


Que- Colloids can be purified by 

a. Condensation 

b. Condensation 

c. Condensation 

d. Dialysis 


Answer- Dialysis


Que- The tip of the match-stick contains 

a. Phosphorus pentoxide 

b. White phosphorus 

c. Red phosphorus 

d. Phosphorus trichloride 


Answer- Red phosphorus


Que- Which of the following is a natural dye ? 

a. Crystal violet 

b. Aniline blue 

c. Alizarin 

d. Phenolphthalein 


Answer- Alizarin


Que- Poison used for killing rats is 

a. Calcium phosphide (Ca3P2) 

b. Zinc phosphide (Zn3P2) 

c. Magnesium nitride (Mg3N2) 

d. Magnesium phosphide (Mg3P2) 


Answer- Zinc phosphide (Zn3P2)


Que- The chemical used in developing photographic films is 

a. Silver bromide 

b. Hypo 

c. Sodium sulphate 

d. Hydroquinone 


Answer- Silver bromide


Que- Which one of the following is used as an anti-freeze for the automobile engines ? 

a. Propyl alcohol 

b. Ethanol 

c. Methanol 

d. Ethylene glycol 


Answer- Ethylene glycol


Que- A fertile soil is likely to have a pH of 

a. 3 

b. 9 

c. 6-7 

d. 14 


Answer- 6-7


Que- Litmus is obtained from 

a. A bacterium 

b. A fungus 

c. An alga 

d. Lichen 


Answer- Lichen


Que- The pH of lemon juice is expected to be 

a. Equal to 7 

b. More than 7 

c. Less than 7 

d. Nothing can be predicted 


Answer- Less than 7


Que- Antacids are found in drugs that give relief to 

a. Eye sight 

b. Stomach ache 

c. Acne 

d. Headache 


Answer- Stomach ache


Que- The pH of human blood is between 

a. 6.5-7 

b. 7.5-8 

c. 8-9 

d. 4.5-5 


Answer- 7.5-8


Que- Petroleum is a mixture of 

a. Elements 

b. Hydrocarbons 

c. Polymers 

d. Salts 


Answer- Hydrocarbons


Que- Which of the following contains high content of lead? 

a. Coal 

b. Cooking gas 

c. High octane fuel 

d. Low octane fuel 


Answer- High octane fuel


Que- Piped Natural Gas (PNG) is used for 

a. Mining 

b. Welding 

c. Anaesthesia 

d. Cooking 


Answer- Cooking


Que- Petroleum consists of a mixture of 

a. Carbohydrates 

b. Carbonates 

c. Hydrocarbons 

d. Carbides 


Answer- Hydrocarbons


Que- White coal is 

a. Uranium 

b. Hydro-electricity 

c. Diamond 

d. None of these 


Answer- None of these


Que- Which of the following is used to iodise common salt ? 

a. Potassium iodide 

b. Iodine 

c. Potassium iodate 

d. Sodium iodide 


Answer- Potassium iodate


Que- A thick paste of cement, sand and water is called 

a. Concrete 

b. R.C.C. 

c. Mortar 

d. Kiln 


Answer- Mortar


Que- What is the most commonly used substance in fluorescent tubes? 

a. Sodium oxide and argon 

b. Sodium vapour and neon 

c. Mercury vapour and argon 

d. Mercury oxide and neon 


Answer- Mercury vapour and argon


Que- Tear gas is : 

a. Chloroprene 

b. Carbonyl chloride 

c. Nitrous oxide 

d. Bleaching powder 


Answer- Carbonyl chloride


Que- Tetra ethyle lead (TEL) is 

a. A catalyst in burning fossil fuel 

b. An antioxidant 

c. A reductant 

d. An antiknock compound 


Answer- An antiknock compound


Que- The chief source for the production of nitrogeneous fertilizers is : 

a. Ammonia 

b. Nitric acid 

c. Nitrogen 

d. Nitrogen dioxide 


Answer- Ammonia


Que- Which one of the following elements is used in the manufacture of safety matches? 

a. Graphite 

b. Phosphorus 

c. Silicon 

d. Sodium 


Answer- Phosphorus


Que- Zinc sulphide is commonly used as 

a. Fungicide 

b. Herbicide 

c. Rodenticide 

d. Deodorant 


Answer- Rodenticide


Que- Which halide is used in making sensitive emulsion on photograhic film? 

a. Sodium chloride 

b. Silver bromide 

c. Silver iodide 

d. Silver chloride 


Answer- Silver bromide


Que- Detergents clean surfaces on the principle of 

a. Viscosity 

b. Surface tension 

c. Elasticity 

d. Floatation 


Answer- Surface tension


Que- Which one of the following is not a characteristic feature of alloys?  

a. Compounds 

b. Mixtures 

c. Solutions 

d. Homogeneous systems 


Answer- Homogeneous systems


Que- Galena is a mineral of 

a. Iron 

b. Gold 

c. Lead 

d. Calcium 


Answer- Lead


Que- The iron ore which contains 72% of iron is : 

a. Magnetite 

b. Limonite 

c. Haematite 

d. Siderite 


Answer- Magnetite


Que- Bauxite is an alloy of which of the following metals ? 

a. Aluminium 

b. Silver 

c. Tin 

d. Iron 


Answer- Aluminium


Que- Hard steel contains 

a. 2 to 5 per cent carbon 

b. 0.5 to 1.5 per cent carbon 

c. 0.1 to 0.4 per cent carbon 

d. 0.01 to 0.04 per cent carbon 


Answer- 0.5 to 1.5 per cent carbon


Que- Which of the following is not a greenhouse gas ? 

a. Hydrogen 

b. Carbon dioxide 

c. Nitric oxide 

d. Chlorofluorocarbon 


Answer- Hydrogen


Que- Which is abundant in Gobar gas? 

a. Carbon dioxide 

b. Methane 

c. Oxygen 

d. Hydrogen 


Answer- Methane


Que- Concentration of a material which is lethal to 50% animal is called 

a. LD50 

b. LC50 

c. NOAEL 

d. ADI 


Answer- LD50


Que- The major harmful gas emitted by automobile vehicle which causes air pollution is 

a. Carbon Monoxide 

b. Methane 

c. Carbon dioxide 

d. Ozone gas 


Answer- Carbon Monoxide


Que- The major harmful gas emitted by automobile vehicles which causes air pollution is 

a. Carbon Monoxide 

b. Methane 

c. Carbon dioxide 

d. Ozone gas 


Answer- Carbon Monoxide


Que- The element which is used for vulcanizing rubber 

a. Sulphur 

b. Bromine 

c. Silicon 

d. Phosphorus 


Answer- Sulphur


Que- Chemically ‘Quick Silver' is known as 

a. Mercury 

b. Silver 

c. Aluminium 

d. Copper 


Answer- Mercury


Que- The weight of 6.023 × 1023 atoms of carbon is 

a. 12 gms 

b. 120 gms 

c. 1.2 gms 

d. 0.12 gms 


Answer- 12 gms


Que- If there is one million Mg2+ ions in MgCl2, how many chloride ions are there?  

a. Two million 

b. One million 

c. Half a million 

d. Ten million 


Answer- Two million


Que- What is the mass percentage of carbon in carbon dioxide (CO2)? 

a. 15.8 % 

b. 20.1 % 

c. 27.3 % 

d. 32.3 % 


Answer- 27.3 %


Que- Chemical name of bleaching powder is : 

a. Calcium chlorate 

b. Calcium hypochlorite 

c. Calcium chloro hypochlorite 

d. Calcium bi chloride 


Answer- Calcium hypochlorite


Que- The chemical formula of the laughing gas is 

a. NO 

b. N2O 

c. NO2 

d. N2O3 


Answer- N2O


Que- The common name for the compound having formal NaOH is 

a. Caustic soda 

b. Caustic potash 

c. Soda ash 

d. Sodium hydroxide 


Answer- Caustic soda


Que- Philosopher’s wool is chemically 

a. Aluminium oxide 

b. Magnesium oxide 

c. Zinc oxide 

d. Calcium oxide 


Answer- Zinc oxide


Que- What is the atomic number of Oxygen? 

a. 5 

b. 8 

c. 12 

d. 22 


Answer- 8


Que- Which one of the following metals pollutes the air of a city having large number of automobiles? 

a. Cadmium 

b. Chromium 

c. Lead 

d. Copper 


Answer- Lead


Que- Pollutant from motor car exhaust that causes mental disease is 

a. Lead 

b. NO2 

c. SO2 

d. Hg 


Answer- Lead


Que- The most common cause of pollution of air is 

a. Carbon dioxide 

b. Carbon monoxide 

c. Sulphur dioxide 

d. Smoke 


Answer- Sulphur dioxide


Que- Particulates (< 1 ┬Ám size) remaining suspended in air indefinitely and transported by wind currents are called 

a. Mists 

b. Fumes 

c. Aerosols 

d. Smoke 


Answer- Aerosols


Que- Mercury is emitted into air by 

a. Burning coal 

b. Burning garbage 

c. Coal fire 

d. Steam engine 


Answer- Burning garbage


Que- Iron and manganese present as pollutants in water cannot be removed by________ 

a. Oxidation followed by settling and filtration 

b. Chlorination 

c. Ion exchange process 

d. Lime soda process or manganese zeolite process 


Answer- Chlorination


Que- Table salt gets moist during rainy season because 

a. Sodium chloride is hygroscopic 

b. Sodium chloride is deliquescent 

c. Sodium chloride contains some quantity of sodium iodide 

d. Sodium chloride contains hygroscopic impurities like magnesium chloride 


Answer- Sodium chloride contains hygroscopic impurities like magnesium chloride


Que- The unit to measure the flow of water is 

a. Micro Mho 

b. Ohm meter 

c. Milli curie 

d. Cusecs 


Answer- Cusecs


Que- When water itself combines chemically with some element or mineral it is called 

a. Carbonation 

b. Desilication 

c. Hydration 

d. Oxidation 


Answer- Hydration


Que- Sea water is saltier than rain water because 

a. Sea animals are salt producing 

b. The air around the sea is saltish 

c. Rivers wash away salts from earth and pour them into the sea 

d. Sea beds have salt producing mines 


Answer- Rivers wash away salts from earth and pour them into the sea


Que- Spirit in contact with body gives cool sensation because it is : 

a. Liquid 

b. Transparent 

c. Highly volatile 

d. A good conductor 


Answer- Highly volatile


Que- Which one is a sublime substance? 

a. Table salt 

b. Sugar 

c. Iodine 

d. Potassium Iodide 


Answer- Iodine


Que- The biogas used for cooking is a mixture of which of the following? 

a. Carbon dioxide and oxygen 

b. Isobutane and propane 

c. Methane and carbon monoxide 

d. Methane and carbon dioxide 


Answer- Methane and carbon dioxide


Que- The major constituent of gobar gas is 

a. Carbon dioxide 

b. Methane 

c. Butane 

d. Isobutane 


Answer- Methane


Que- ________ is a by product of sewage treatment and can be decomposed to produce biogas 

a. Sewage 

b. Sludge 

c. Sewer 

d. Scum 


Answer- Sludge


Que- The metal does not give H2 on treatment with dilute HCL is 

a. Zn 

b. Fe 

c. Ag 

d. Ca 


Answer- Ag


Que- The number of g-molecule of oxygen in 6.02 x 1024 CO molecules is 

a. 1 gram of molecule 

b. 0.5 gram of molecule 

c. 5 gram of molecule 

d. 10 gram of molecule 


Answer- 5 gram of molecule


Que- The most extensive, commercially useful source of thorium as monazite sand occurs in India at 

a. Orissa coast 

b. Travancore coast 

c. West Bengal coast 

d. Gujarat coast 


Answer- Travancore coast


Que- The main active constituent of tea and coffee is 

a. nicotine 

b. chlorophyll 

c. caffeine 

d. aspirin 


Answer- caffeine


Que- The maximum number of isomers for an alkene with molecular formula C4H8 is 

a. 5 

b. 4 

c. 2 

d. 3 


Answer- 4


Que- The first metal used by man was 

a. iron 

b. copper 

c. gold 

d. bronze 


Answer- copper


Que- The hydronium ion is 

a. H+ 

b. HO - 

c. H2+ 

d. H3O+ 


Answer- H3O+


Que- The most electropositive elements among the following is 

a. Na 

b. Ca 

c. K 

d. Cs 


Answer- Cs


Que- The method that cannot be used for removing permanent hardness of water is 

a. adding sodium carbonate 

b. distillation 

c. adding caustic soda 

d. boiling 


Answer- boiling


Que- The following are the half lives of four active isotopes. Which one of the following is the most dangerous to handle? 

a. 3 billion years 

b. 100 years 

c. 0.01 minute 

d. 13 days 


Answer- 0.01 minute


Que- Which one is a soluble salt in H2O? 

a. CuS 

b. Zn(OH)2 

c. CaCl2 

d. PbCl2 


Answer- CaCl2


Que- Vinegar is ________ . 

a. Diluted acetic acid 

b. Glacial acetic acid 

c. Glacial formic acid 

d. Diluted formic acid 


Answer- Diluted formic acid


Que- pH value between 6.5-7.5 makes the soil 

a. Basic 

b. Neutral 

c. Acidic 

d. None of these 


Answer- None of these


Que- A pungent smell often present near the urinals is due to 

a. Sulphur dioxide 

b. Chlorine 

c. Ammonia 

d. Urea 


Answer- Ammonia


Que- Ammonial is a mixture of 

a. Aluminium powder and ammonium nitrate 

b. Aluminium powder and ammonium chloride 

c. Aluminium powder and ammonium sulphate 

d. Aluminium powder and potassium nitrate 


Answer- Aluminium powder and ammonium nitrate


Que- The heat value of combustion of Gasoline is 

a. 12600 kJ/kg 

b. 14600 kJ/kg 

c. 39400 kJ/kg 

d. 47000 kJ/kg 


Answer- 47000 kJ/kg


Que- Which one of the following gases has the highest calorific value? 

a. Natural gas 

b. Water gas 

c. Coal gas 

d. Indane gas 


Answer- Indane gas


Que- When a metal is heated in a flame, the electrons absorb energy and jump to higher energy state. On coming back to the lower energy siate, they emit light, which we can observe in 

a. Raman spectra 

b. Absorption spectra 

c. Emission spectra 

d. Fluorescence 


Answer- Emission spectra


Que- If the equilibrium constants for the systems H2 + I2 -> 2HI and 2HI -> H2 + I2 are K1 and K2 respectively, the relationship between K1 and K2 is : 

a. K1 = K2 

b. K1 = 2K2 

c. K1 = K2/2 

d. K1= 1/K2 


Answer- K1= 1/K2


Que- The influence of temperature on reaction rate is predicted by 

a. Van der Waals equation 

b. Kirchhoff's equation 

c. Arrhenius equation 

d. Lewis equation 


Answer- Arrhenius equation


Que- An example of heterocyclic compound is 

a. Naphthalene 

b. Furan 

c. Benzene 

d. Anthracene 


Answer- Furan


Que- In organic compounds, nitrogen is estimated by 

a. Carius method 

b. Victor-Meyer's method 

c. Liebig's method 

d. Dumas method 


Answer- Dumas method


Que- Heavy metals got their name because compared to other atoms they have 

a. Higher densities 

b. Higher atomic masses 

c. Higher atomic numbers 

d. Higher atomic radii 


Answer- Higher atomic masses


Que- Which one of the following elements exhibits the greatest tendency to lose electrons ? 

a. Fluorine 

b. Lithium 

c. Oxygen 

d. Zinc 


Answer- Lithium

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