Chemistry MCQ (Multiple Choice Questions) - SchoolingAxis

Chemistry MCQ (Multiple Choice Questions)

 Que- What particles move around the nucleus of an atom and are negatively charged? 

a. Electrons 

b. Protons 

c. Positrons 

d. Neutrons 


Answer- Electrons


Que- All isotopes of the same element have ______________ 

a. Different atomic numbers and different atomic mass 

b. Different atomic numbers and the same atomic mass 

c. The same atomic number but different atomic masses 

d. The same atomic number and the atomic mass 


Answer- The same atomic number but different atomic masses


Que- Mercury is a : 

a. Solid metal 

b. Liquid metal 

c. Solid non-metal 

d. Liquid non-metal 


Answer- Liquid metal


Que- The lustre of the metals is because of 

a. High density, due to closed packing of atoms 

b. High polish 

c. Reflection of light due to the presence of free electrons 

d. Absorption of light due to the presence of cavities 


Answer- Reflection of light due to the presence of free electrons


Que- The non-metal found in the liquid state is 

a. Bromine 

b. Nitrogen 

c. Fluorine 

d. Chlorine 


Answer- Bromine


Que- Which among the following is liquid non-metal ? 

a. Mercury 

b. Bromine 

c. Water 

d. Alcohol 


Answer- Bromine


Que- Metal are good conductors, because 

a. They contain free electrons 

b. The molecules in them are very close to each other 

c. The molecules in them collide very freely 

d. They contain reflecting surface 


Answer- They contain free electrons


Que- The element used in the manufacture of safety matches is 

a. Phosphorous 

b. Magnesium 

c. Silicon 

d. Sulphur 


Answer- Phosphorous


Que- This group of alumino-silicate minerals is widely used in making electrical insulators 

a. Bauxite 

b. Chromite 

c. Manganese 

d. Mica 


Answer- Mica


Que- Commercial Vaseline is derived from 

a. Plant gums 

b. Coal tar 

c. Wool wax 

d. Petroleum 


Answer- Petroleum


Que- Alum is used as 

a. An analgesic 

b. A fertilizer 

c. A disinfectant 

d. A purifier for water 


Answer- A purifier for water


Que- Antacid tablets consist of 

a. Hydroxides of sodium, magnesium and aluminium 

b. Hydroxides of magnesium and aluminium 

c. Hydroxides of sodium and aluminium 

d. Hydroxides of magnesium and sodium 


Answer- Hydroxides of magnesium and aluminium


Que- The most important ore of lead is 

a. Galena 

b. Magnetite 

c. Pyrolusite 

d. Siderite 


Answer- Galena


Que- Steel contains 

a. 0.1 – 5% carbon 

b. 5 – 10% carbon 

c. More than 10% carbon 

d. No carbon 


Answer- 0.1 – 5% carbon


Que- Which is the purest commercial form of iron ? 

a. Pig iron 

b. Steel 

c. Stainless steel 

d. Wrought iron 


Answer- Wrought iron


Que- The most abundant metal in the Earth’s crust is 

a. Zinc 

b. Copper 

c. Aluminium 

d. Iron 


Answer- Aluminium


Que- The ore of Aluminium is 

a. Fluorspar 

b. Bauxite 

c. Chalco pyrites 

d. Hematite 


Answer- Bauxite


Que- Carbon monoxide is an inflammable gas. Which one of the following is also inflammable? 

a. Helium 

b. Nitrogen 

c. Oxygen 

d. Hydrogen 


Answer- Hydrogen


Que- When Hydrogen starts burning in air, it produces ? 

a. Ammonia 

b. Water 

c. Methane 

d. Carbonic Acid 


Answer- Water


Que- The gas which turns into liquid at the lowest temperature among the following is 

a. Hydrogen 

b. Oxygen 

c. Helium 

d. Nitrogen 


Answer- Hydrogen


Que- The gas that is used in the manufacture of vanaspati ghee is : 

a. Oxygen 

b. Carbon dioxide 

c. Hydrogen 

d. Nitrogen 


Answer- Hydrogen


Que- Which one of the following metals does not react with water to produce Hydrogen ? 

a. Potassium 

b. Cadmium 

c. Sodium 

d. Lithium 


Answer- Cadmium


Que- The name of unreactive gas is 

a. Carbon dioxide 

b. Hydrogen 

c. Nitrogen 

d. Oxygen 


Answer- Nitrogen


Que- The green colour seen in firework displays is due to the chloride salt of : 

a. Sodium 

b. Strontium 

c. Barium 

d. Calcium 


Answer- Barium


Que- In deep-sea diving, divers use a mixture of gases consisting of oxygen and 

a. Hydrogen 

b. Nitrogen 

c. Argon 

d. Helium 


Answer- Nitrogen


Que- Now-a-days yellow lamps are frequently used as street lights. Which of the following gases is used in these lamps ? 

a. Sodium 

b. Neon 

c. Hydrogen 

d. Nitrogen 


Answer- Sodium


Que- Which of the following is not soluble in water ? 

a. Lead Sulphate 

b. Zinc sulphate 

c. Potassium sulphate 

d. Sodium sulphate 


Answer- Zinc sulphate


Que- The material used in the manufacture of lead pencil is 

a. Graphite 

b. Lead 

c. Carbon 

d. Mica 


Answer- Graphite


Que- Water can be separated from alcohol water mixture by 

a. Decantation 

b. Evaporation 

c. Distillation 

d. Sublimation 


Answer- Distillation


Que- In addition to hydrogen, the other abundant element present on Sun’s surface is 

a. Helium 

b. Neon 

c. Argon 

d. Oxygen 


Answer- Helium


Que- The most abundant element by number in the living system is : 

a. Nitrogen 

b. Hydrogen 

c. Oxygen 

d. Carbon 


Answer- Hydrogen


Que- What is the element required for solar energy conversion ? 

a. Beryllium 

b. Tantalum 

c. Silicon 

d. Ultra pure carbon 


Answer- Silicon


Que- The mass number of a nucleus is 

a. always less than its atomic number 

b. the sum of the number of protons and neutrons present in the nucleus 

c. always more than the atomic weight 

d. a fraction 


Answer- the sum of the number of protons and neutrons present in the nucleus


Que- The inexpensive and commonly used variety of glass is called soda glass. It is called so because 

a. was used initially for making bottles of soda(carbonated drink) 

b. is made using soda(sodium carbonate) 

c. was initially used for storing sodium carbonate 

d. is made using soda lime 


Answer- is made using soda(sodium carbonate)


Que- The gas used in the manufacture of vanaspati from vegetable oil is 

a. hydrogen 

b. oxygen 

c. nitrogen 

d. carbon dioxide 


Answer- hydrogen


Que- The ionic radii of N3-, O2-, F- and Na+ follows the order 

a. N3- > O2- > F- > Na+ 

b. N3- > Na+ > O2- > F- 

c. Na+ > O2- > N3- > F- 

d. O2- > F- > Na+ > N3- 


Answer- N3- > O2- > F- > Na+


Que- The graphite rods in the nuclear reactor 

a. react with U to release energy 

b. produce neutrons 

c. undergo combustion which triggers the nuclear fission 

d. convert fast moving neutrons into thermal neutrons 


Answer- convert fast moving neutrons into thermal neutrons


Que- The new strain of bacteria produced by biotechnology in alcohol industry is 

a. Escherichia coli 

b. Saccharomyces cerevisiae 

c. Bacillus subtilis 

d. Pseudomonas putida 


Answer- Pseudomonas putida


Que- Molasses a by-product in the manufacture of sugar, is converted into 

a. Alcohol 

b. Paper 

c. Fuel 

d. Pulp 


Answer- Alcohol


Que- Denatured spirit is ethanol mixed with 

a. Petrol 

b. Kerosene 

c. Water 

d. Pyridine 


Answer- Pyridine


Que- Rectified spirit is : 

a. 95% ethyl alcohol 

b. 100% ethyl alcohol 

c. Methylated spirit 

d. Tincture iodine 


Answer- 95% ethyl alcohol


Que- The reaction intermediate formed during the preparation of diethyl ether from ethanol by treatment with H2SO4 is 

a. Carbanion 

b. Carbocation 

c. Carbene 

d. Free radical 


Answer- Carbocation


Que- Which one of the following acids is used in battery ? 

a. Hydrochloric acid 

b. Hydrofluoric acid 

c. Sulphuric acid 

d. Sulphurous acid 


Answer- Sulphuric acid


Que- Which of the following is the strongest base in aqueous solution ? 

a. Diethylamine 

b. Triethylamine 

c. Ammonia 

d. Ethylamine 


Answer- Diethylamine


Que- Which of the following acids serves as an electrolyte in a lead storage battery? 

a. Sulphuric acid 

b. Lactic acid 

c. Hydrochloric acid 

d. Nitric acid 


Answer- Sulphuric acid


Que- Which is known as carbolic acid? 

a. Phenol 

b. Ethanol 

c. Acetic acid 

d. Oxalic acid 


Answer- Phenol


Que- Citric acid is present in free form in 

a. Tamarind 

b. Milk 

c. Apple 

d. Lemon 


Answer- Lemon


Que- Depletion of ozone layer causes 

a. Blood cancer 

b. Lung cancer 

c. Skin cancer 

d. Breast cancer 


Answer- Skin cancer


Que- Nitrification is the biological process of converting 

a. N2 into nitrate 

b. N2 into nitrite 

c. Ammonia into nitrite 

d. Ammonia into N2 


Answer- Ammonia into nitrite


Que- Besides CO2, the other green house gas is 

a. CH4 

b. N2  

c. Ar 

d. O2 


Answer- CH4


Que- The greenhouse effect is caused by the higher level of which gas in the atmosphere ? 

a. Carbon monoxide 

b. Carbon dioxide 

c. Nitrous oxide 

d. Sulphur dioxide 


Answer- Carbon dioxide


Que- The atmospheric gas that is mainly responsible for green house effect : 

a. Ozone 

b. Nitrogen 

c. Oxygen 

d. Carbon dioxide 


Answer- Carbon dioxide


Que- Wood spirit is 

a. Methyl alcohol 

b. Ethyl alcohol 

c. Butyl alcohol 

d. Propyl alcohol 


Answer- Methyl alcohol


Que- When formaldehyde and potassium hydroxide are heated, we get 

a. Acetylene 

b. Methyl alcohol 

c. Methane 

d. Ethyl formate 


Answer- Methyl alcohol


Que- Which of the following metals causes Itai-Itai disease ? 

a. Cadmium 

b. Chromium 

c. Cobalt 

d. Copper 


Answer- Cadmium


Que- Which component referred to as 'Milk sugar'? 

a. Lactose 

b. Maltose 

c. Galactose 

d. Sucrose 


Answer- Lactose


Que- Match the List-I with List-II and select the correct answer using the codes given belowList-I (Vitamin)List-II(Chemical compound)F.Vitamin A1.ThiaminG.Vitamin B12.RetinolH.Vitamin C3.Ascorbic acidJ.Vitamin E4.TocopherolCodes :FGHJA.4132B.2314C.4312D.2134 

a. A 

b. B 

c. C 

d. D 


Answer- D


Que- The oil used in the froth floatation process is 

a. coconut oil 

b. olive oil 

c. kerosene oil 

d. pine oil 


Answer- pine oil


Que- The number of waves in n x 10th Bohr's orbit are 

a. n2 

b. n 

c. n-2 

d. n3 


Answer- n


Que- The mass of one Avogadro number of helium atom is 

a. 1.00 gram 

b. 4.00 gram 

c. 8.00 gram 

d. 4 x 6.02 x 1023 gram 


Answer- 4 x 6.02 x 1023 gram


Que- The items amenable to detection by soft x-rays are 

a. contrabands 

b. lead in bullets 

c. narcotics 

d. genuine coins from counterfeit coins 


Answer- genuine coins from counterfeit coins


Que- The material which can be deformed permanently by heat and pressure is called a 

a. thermoplastic 

b. thermoset 

c. chemical compound 

d. polymer 


Answer- thermoset


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

a. 30.5% 

b. 50.9 % 

c. 65.8 % 

d. 72.7 % 


Answer- 72.7 %


Que- Number of 6.023 × 1023 atoms present in one mole of a gas at STP is 

a. 6.023 × 1020 

b. 6.023 × 1023 

c. 6.023 × 10–20 

d. 6.023 × 10–23 


Answer- 6.023 × 1023


Que- The percentage of nitrogen present in ammonium sulphate is : 

a. 27% 

b. 25% 

c. 30.5% 

d. 18% 


Answer- 27%


Que- The value of Avogadro Number is 

a. 6.023 × 1022 

b. 6.023 × 1023 

c. 6.023 × 1024 

d. 6.023 × 1025 


Answer- 6.023 × 1023


Que- Aqua regia is a 1 : 3 mixture, by volume, of 

a. Conc. nitric acid and conc. hydrochloric acid 

b. Conc. hydrochloric acid and conc. nitric acid 

c. Conc. nitric acid and conc. sulphuric acid 

d. Conc. sulphuric acid and conc. nitric acid 


Answer- Conc. nitric acid and conc. hydrochloric acid


Que- Which of the following statements are correct about chloroform? a. Liquid fuel b. Anaesthetic in nature c. Produces phosgene d. Fire extinguisher 

a. A, B 

b. A, C 

c. B, C 

d. D, A 


Answer- B, C


Que- Which of the following is an antidiabatic drug? 

a. Insulin 

b. Penicillin 

c. Chloroquine 

d. Aspirin 


Answer- Insulin


Que- Tear gas used by the police to disperse the mob contains 

a. Carbon dioxide 

b. Chlorine 

c. Ammonia 

d. Hydrogen sulphide 


Answer- Chlorine


Que- Which of the following is also used as a Bio fertilizer? 

a. Urea 

b. Ammonia 

c. Uric Acid 

d. None of these 


Answer- None of these


Que- The advantage of detergents over soaps is 

a. Detergents are soluble in water 

b. Detergents could not give much lather 

c. Detergents give lather even with hard water 

d. Soaps give lather with only soft water 


Answer- Detergents give lather even with hard water


Que- Which one of the following is an example of a gel ? 

a. Cheese 

b. Milk 

c. Face cream 

d. Shaving cream


Answer- Face cream


Que- A substance which readily forms colloidal solution in contact with water is called 

a. Extrinsic colloid 

b. Associated colloid 

c. Hydrophobic colloid 

d. Hydrophilic colloid 


Answer- Hydrophilic colloid


Que- Peptization is a process of 

a. Precipitation of colloidal particles 

b. Purification of colloids 

c. Protection of colloidal solution 

d. Dispersing precipitates into colloidal solution 


Answer- Dispersing precipitates into colloidal solution


Que- What do you understand by the term Espuma ? 

a. Foam 

b. Soap 

c. Salt 

d. Calcium 


Answer- Foam


Que- Cloud is a colloidal dispersion of 

a. Air in a dispersion medium of water 

b. Fog in a dispersion medium of water 

c. Mist in a dispersion medium of air 

d. Water drops in a dispersion medium of air 


Answer- Water drops in a dispersion medium of air


Que- Which gas does not form the part of atmosphere ? 

a. Nitrogen 

b. Helium 

c. Chlorine 

d. None of the above 


Answer- Chlorine


Que- Which one of the following statement is correct ?Ozone is found in the earth's atmosphere mostly between 

a. 5 and 10 km 

b. 10 and 20 km 

c. 20 and 50 km 

d. 50 and 100 km 


Answer- 20 and 50 km


Que- Which one of the following is not a ‘green house gas’ ? 

a. Chlorofluorocarbons 

b. Methane 

c. Carbon dioxide 

d. Nitrogen 


Answer- Nitrogen


Que- Green house effect is accelerated by 

a. Deforestation 

b. Rapid industrialization 

c. Increased transportation activity 

d. All of these 


Answer- All of these


Que- Smoke is formed due to 

a. Solid dispersed in gas 

b. Solid dispresed in liquid 

c. Gas dispresed in solid 

d. Gas dispersed in gas 


Answer- Solid dispersed in gas


Que- The components of water can be separated by 

a. Physical methods 

b. Chemical methods 

c. Both A and B 

d. They can not be separated 


Answer- Chemical methods


Que- Which of the following is not a chemical reaction? 

a. Burning of paper 

b. Digestion of food 

c. Conversion of water into steam 

d. Burning of coal 


Answer- Conversion of water into steam


Que- Chemical formula of washing soda is 

a. Na2SO4.10H2O 

b. NaHCO3 

c. Na2CO3.10H2O 

d. Ca(OH)2 


Answer- Na2CO3.10H2O


Que- What is the chemical name for ‘Baking Soda’ ? 

a. Sodium carbonate 

b. Sodium bicarbonate 

c. Sodium nitrite 

d. Sodium nitrate 


Answer- Sodium bicarbonate


Que- The chemical name of ‘Common salt’ is 

a. Sodium chloride 

b. Sodium nitrate 

c. Ammonium chloride 

d. Calcium chloride 


Answer- Sodium chloride


Que- When a lead storage battery is discharged, 

a. SO2 is evolved 

b. Lead sulphate is consumed 

c. Lead is formed 

d. Sulphuric acid is consumed 


Answer- Sulphuric acid is consumed


Que- Which of the following pairs of materials serves as electrodes in rechargeable batteries commonly used in devices such as torch lights, electric shavers, etc. ? 

a. Iron and cadmium 

b. Nickel and cadmium 

c. Lead peroxide and lead 

d. Zinc and carbon 


Answer- Nickel and cadmium


Que- In a Carbonyl group a carbon atom makes double bond with 

a. Carbon 

b. Oxygen 

c. Hydrogen 

d. None of the above 


Answer- Oxygen


Que- Williamson's synthesis is widely used in the laboratory preparation of 

a. Alcohols 

b. Ethers 

c. Aldehydes 

d. Esters 


Answer- Ethers


Que- German silver, an alloy, does not contain the metal 

a. Nickel 

b. Zinc 

c. Copper 

d. Silver 


Answer- Silver


Que- Colour imparted to the Bunsen flame by strontium salt is 

a. Bluish green 

b. Apple-green 

c. Brick red 

d. Crimson red 


Answer- Crimson red


Que- An oxidising agent is a 

a. An electron acceptor 

b. An electron donor 

c. In a chemical reaction its oxidation number increases 

d. It releases H2 in a chemical reaction 


Answer- An electron acceptor


Que- Silver gets corroded due to ________ in air. 

a. Oxygen 

b. Hydrogen Sulphide 

c. Carbon dioxide 

d. Nitrogen 


Answer- Hydrogen Sulphide


Que- Which of the following causes the rusting of iron? a. Oxidation b. Reduction c. Chemical reaction with oxygend. Chemical reaction with CO2 

a. A and B 

b. B and C 

c. C and D 

d. A and C 


Answer- A and C


Que- Photo-oxidation process is initiated by 

a. Light 

b. Heat 

c. Oxygen 

d. Catalyst 


Answer- Light


Que- Galvanised iron is made by coating iron with 

a. Zinc 

b. Nickel 

c. Chromium 

d. Sulphur 


Answer- Zinc


Que- Slag is a name given for 

a. Molten iron 

b. Molten sand 

c. Molten alumina 

d. Molten calcium silicate 


Answer- Molten alumina


Que- Solder is an alloy of 

a. Lead, zinc 

b. Copper, lead 

c. Tin, lead 

d. Sodium, lead 


Answer- Tin, lead

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