Class 10 Chemistry MCQ (Multiple Choice Questions)

 we will cover Class 10 Chemistry MCQs. Based on the NCERT syllabus, this section includes essential topics such as Chemical Reactions and Equations, Acids, Bases, and Salts, Metals and Non-metals, Carbon and its Compounds. Practicing these MCQs will help students strengthen their knowledge, improve problem-solving skills, and prepare effectively for exams.

1. What is a chemical reaction?
a) A process that results in the formation of a new substance
b) A process where no new substance is formed
c) A process where two substances are mixed
d) A physical change in matte

2. Which of the following is a noble gas?
a) Hydrogen
b) Helium
c) Nitrogen
d) Oxygen

3. Which of the following is a chemical reaction?
a) Melting wax
b) Burning a candle
c) Freezing water
d) Dissolving sugar in water

4. What is the product of the reaction between an acid and a metal?
a) Oxygen and metal oxide
b) Water and carbon dioxide
c) Salt and hydrogen gas
d) Salt and water

5. What is the common name of sodium hydroxide?
a) Vinegar
b) Ammonia
c) Baking soda
d) Caustic soda

6. Which of the following is a strong acid?
a) Hydrochloric acid
b) Citric acid
c) Acetic acid
d) Carbonic acid

7. Which of the following is a property of acids?
a) They feel slippery
b) They release hydrogen ions in water
c) They turn litmus paper blue
d) They taste bitter

8. What is the common name of calcium oxide?
a) Chalk
b) Slaked lime
c) Quicklime
d) Marble

9. Which of the following is a property of metals?
a) They have low melting points
b) They are ductile and malleable
c) They are poor conductors of heat
d) They are non-lustrous

10. What is the chemical formula for hydrogen peroxide?
a) H2O2
b) H2O
c) HO2
d) O2H2

11. What is produced when a fuel burns in oxygen?
a) Salt and water
b) Oxygen and nitrogen
c) Hydrogen and carbon
d) Water and carbon dioxide

12. Which of these is a metal?
a) Nitrogen
b) Oxygen
c) Sulfur
d) Iron

13. Which non-metal is used in the manufacture of fertilizers?
a) Chlorine
b) Oxygen
c) Nitrogen
d) Sulfur

14. What is the formula for methane?
a) CH4
b) C2H6
c) C4H10
d) C4H2

15. What does the litmus test determine?
a) The temperature of a substance
b) Whether a substance is acidic or basic
c) The pH of a substance
d) The solubility of a substance

16. Which of these is a saturated hydrocarbon?
a) Methane
b) Ethene
c) Propene
d) Ethyne

17. Which of these is an organic compound?
a) Sodium chloride
b) Calcium carbonate
c) Water
d) Glucose

18. What is the functional group of alcohols?
a) -COOH
b) -OH
c) -CHO
d) -NH2

19. Which of the following is a property of graphite?

a) It does not conduct electricity
b) It is a good conductor of electricity
c) It is hard and brittle
d) It is a good insulator
20. Which of the following is a property of carbon monoxide?

a) It is used as a refrigerant
b) It supports combustion
c) It is highly flammable
d) It is colorless, odorless, and poisonous
21. Which gas is produced when vinegar reacts with baking soda?

a) Carbon dioxide
b) Oxygen
c) Nitrogen
d) Hydrogen

22. Which of the following is an allotrope of carbon?
a) Water
b) Diamond
c) Methane
d) Carbon dioxide

23. What is the type of reaction when a substance breaks down into two or more simpler substances?
a) Redox reaction
b) Decomposition reaction
c) Displacement reaction
d) Combination reaction

24. Which of the following is a base that is used in cleaning products?
a) Sodium bicarbonate
b) Hydrochloric acid
c) Sodium hydroxide
d) Citric acid

25. Which of the following metals reacts with water to produce hydrogen gas?
a) Gold
b) Zinc
c) Iron
d) Sodium

26. What is the role of a catalyst in a chemical reaction?
a) It speeds up the reaction without being consumed
b) It increases the activation energy
c) It is consumed in the reaction
d) It slows down the reaction

27. Which of the following statements about acids and bases is correct according to Bronsted-Lowry theory?
a) A base is a substance that donates a proton
b) A base is a substance that accepts a proton
c) An acid is a substance that accepts a proton
d) An acid is a substance that donates an electron pair

28. Which of the following is a redox reaction?
a) CuSO4 + Zn → ZnSO4 + Cu
b) NaOH + HCl → NaCl + H2O
c) CaCO3 → CaO + CO2
d) 2Na + Cl2 → 2NaCl

29. Which of the following is a type of polymer formed from carbon-based monomers?
a) Salt
b) Water
c) Nylon
d) Protein

30. In the equation 2Fe + 3Cl2 → 2FeCl3, what is the oxidation state of chlorine in Cl2 and in FeCl3?
a) -1 in Cl2 and +1 in FeCl3
b) 0 in Cl2 and +3 in FeCl3
c) 0 in Cl2 and -1 in FeCl3
d) -1 in Cl2 and +3 in FeCl3

31. Which metal is most commonly used for coating other metals to prevent corrosion?
a) Copper
b) Tin
c) Aluminum
d) Zinc

32. Which of the following is not a property of non-metals?
a) They are poor conductors of heat and electricity
b) They form basic oxides
c) They are brittle
d) They have low melting points

33. What is the IUPAC name for CH3-CH2-CH=CH2?
a) 1-Butene
b) 2-Butene
c) 2-Butyne
d) Butane

34. Which of the following is an example of a displacement reaction?
a) AB + CD → AD + CB
b) A + B → AB
c) A + BC → AC + B
d) AB → A + B

35. What is the pH of lemon juice?
a) 7
b) 3
c) 14
d) 10

36. Which of the following is a characteristic of alkynes?
a) They are saturated hydrocarbons
b) They contain a triple bond between carbon atoms
c) They contain a single bond between carbon atoms
d) They contain a double bond between carbon atoms

37. What happens when an acid is added to water?
a) The solution becomes neutral
b) The solution becomes hot
c) The solution becomes acidic
d) The solution becomes basic

38. Which non-metal is essential for respiration?
a) Nitrogen
b) Carbon dioxide
c) Hydrogen
d) Oxygen

39. What is the name of the bond formed between two carbon atoms in a double bond?
a) Pi bond
b) Sigma bond
c) Triple bond
d) Single bond

40. In the reaction between zinc and hydrochloric acid, what is the gas released?
a) Chlorine
b) Nitrogen
c) Hydrogen
d) Oxygen

41. Which of the following is true about carbon dioxide?
a) It is essential for photosynthesis
b) It supports combustion
c) It is a flammable gas
d) It is a colorless, odorless, and highly reactive gas

42. Which of the following is a common use of ethanol?
a) It is used as a solvent in cleaning products
b) It is used as a fuel
c) It is used as a preservative for food
d) All of the mentioned

43. Which of the following acids is commonly found in vinegar?
a) Nitric acid
b) Hydrochloric acid
c) Acetic acid
d) Sulfuric acid

44. Which of the following metals is liquid at room temperature?
a) Mercury
b) Copper
c) Gold
d) Iron

45. Which of the following is an example of an unsaturated hydrocarbon?
a) Methane
b) Ethene
c) Propane
d) Butane

46. Which of the following represents a decomposition reaction?
a) AB + CD → AD + CB
b) A + B → AB
c) AB → A + B
d) A + BC → AC + B