Subjectwise Questions - Chemicals

Multiple Choice Questions - Chemicals

1. Which of the following acids is contained in the sting of bees and wasps

  1. formic acid
  2. acetic acid
  3. oxalic acid
  4. hydrochloric acid

2. The enzyme that converts glucose to ethyl alcohol is -

  1. Invertase
  2. Maltase
  3. Zymase
  4. Diastase

3. A ‘breath test’ used by traffic police to check drunken driving uses ----

  1. Potassium dichromatic-sulphuric acid
  2. potassium permanganate-sulphuric acid
  3. Turmeric on filter paper
  4. Silica gel coated with silver nitrate

4. Which of the following is the chief constituent of vinegar?

  1. oxalic acid
  2. formic acid
  3. citric acid
  4. acetic acid

5. Which of the following acids is used in a car battery?

  1. hydrochloric acid
  2. sulphuric acid
  3. nitric acid
  4. carbonic acid

6. Leakage of which of the following gases caused the Bhopal gas tragedy?

  1. Carbon monoxide
  2. Methyl isocyanate
  3. Hydrogen sulphide
  4. Nitrous oxide

7. Formalin is generally used as an

  1. antiseptic
  2. anaesthetic
  3. stimulant
  4. preservative

8. Which of the following chemicals is added to LPG to give out a strong smell?

  1. Ethyl mercaptan
  2. Dichloro diflouro methane
  3. Hydrogen sulphide
  4. Ammonia

9. The sour taste of curd is due to the presence of which of the following constituents?

  1. acetic acid
  2. lactic acid
  3. formic acid
  4. citric acid

10. Which of the following chemicals used in photography is also known as hypo?

  1. silver bromide
  2. silver iodide
  3. sodium thiosulphate
  4. silver nitrate


11. Phenyl, commonly used in toilets is closely related to -

  1. Benzene
  2. Sulphuric Acid
  3. Sodium Thiosulphate
  4. Tetrachloroethylene

12. The natural dye present in turmeric is known as

  1. Curcumin
  2. Cinnamin
  3. Phenolphthalein
  4. Methyl Orange

13. Which one of the following elements is used in the manufacture of fertilizers?

  1. Flourine
  2. Lead
  3. Potassium
  4. Aluminium

14. Which one of the following is used to induce artificial rain?

  1. Ammonium chloride
  2. Calcium carbonate
  3. Silver lodide
  4. Potassium Nitrate

15. Nail polish remover contains

  1. benzene
  2. acetone
  3. petroleum
  4. acetic acid


16. By what name is Acetylsalicylic Acid better known?

  1. Vinegar
  2. Brine
  3. Saltpeter
  4. Aspirin

17. What is the role of catalyst in a chemical reaction?

  1. It increases the rate of reaction
  2. It decreases the rate of reaction
  3. It increases the yield of products
  4. It provides better purity of products

18. What is the mixture of potassium nitrate, powdered charcoal and sulphur called?

  1. glass
  2. cement
  3. paint
  4. gun powder

19. When iron is left exposed in open air, it gets rusted. Which constituents(s) of air is/are responsible for rusting iron?

  1. Oxygen gas present in air
  2. Moisture present in air
  3. Carbon dioxide gas present in air

Select the correct answer using the code given below

  1. 1 and 2 only
  2. 1 only
  3. 2 and 3 only
  4. 2 only

20. Which one of the following is extensively used for sterilizing water?

  1. Bleaching powder
  2. Alum
  3. Borax powder
  4. Soda powder

21. Which one among the following substances evolves heat when dissolved in water?

  1. Potassium nitrate
  2. Calcium oxide
  3. Glucose
  4. Sodium chloride

22. Heavy Water implies

  1. Carbonated water
  2. Sea water
  3. Mineral water
  4. Deutrated water

23. When water itself combines chemically with some element of mineral it is called

  1. Carbonation
  2. Desilication
  3. Hydration
  4. Oxidation

24. KMnO4 can be used as a/an

  1. Disinfectant
  2. Insecticide
  3. Fertilizer
  4. Pesticide

25. Which chemical was an important symbol in India's struggle for freedom?

  1. Acetic acid
  2. Ammonium Nitrate
  3. Silver Iodide
  4. Sodium Chloride

26. Dead organs are generally stored in formalin. Formalin is

  1. aqueous ferrous sulphate
  2. aqueous formic acid
  3. aqueous ferric alum
  4. aqueous formaldehyde

27. Contact lenses are made from

  1. polyvinyl chloride
  2. Lucite
  3. polystyrene
  4. Teflon

28. Which one of the following chemicals is used in beauty parlours for hair-setting ?

  1. Phosphorous based
  2. Silicon based
  3. Iron based
  4. Sulphur based

29. Alum is used as

  1. an analgesic
  2. a water purifier
  3. a fertilizer
  4. a disinfectant

30. The rancid smell of spoilt dairy products is due to the liberation of

  1. acetic acid
  2. sulphuric acid
  3. butyric acid
  4. stearic acid

31. Which of the following was known as Aqua Fortis in ancient times?

  1. nitric acid
  2. sulphuric acid
  3. butyric acid
  4. hydrochloric acid

32. Cyclotrimethylenetrinitramine is popularly known as -

  1. TNT
  2. RDX
  3. HTD
  4. TATP

33. Which was the first organic compound to be synthesised from inorganic ingredients?

  1. Urea
  2. Acetic Acid
  3. Sucrose
  4. Methane

34. Which of the following has been found to contain anandamide a neurotransmitter molecule (also known as molecule of extreme pleasure)?

  1. alcohol
  2. tobacco
  3. coffee
  4. chocolate

35. Cyanide poisoning causes death in seconds because

  1. It causes lysis of red blood cells
  2. It breaks the electron transport chain
  3. It denatures enzymes of the heart muscle
  4. It causes cardiac arrest

36. Photochemical Smog is a resultant of the reaction among

  1. High concentration of NO2, O3 and CO in the evening
  2. CO, O2 and peroxyacetyl nitrate in the presence of sunlight
  3. NO2, O3 and peroxyacetyl nitrate in the presence of sunlight
  4. CO, CO2 and NO2 at low temperature

37. The soft silvery metallic element which ionizes easily when heated or exposed to light and is present in atomic clocks is :

  1. cesium
  2. cerium
  3. calcium
  4. californium