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 


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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