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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