Class 10 CBSE Science – Chapter 1 | MCQ Test (Set -4)

11 mark(s)

Which of the following is a chemical change?

AMelting of iceBRusting of ironCBoiling of waterDBreaking of glass

21 mark(s)

Which of the following is a balanced chemical equation?

AMg + O₂ → MgOBMg + 2O₂ → MgOC2Mg + O₂ → 2MgODMg + O₂ → 2MgO

31 mark(s)

Which type of reaction occurs when calcium oxide reacts with water?

ACombination reactionBDisplacement reactionCDecomposition reactionDDouble displacement reaction

41 mark(s)

When lead nitrate is heated, the brown fumes evolved are of:

ALead oxideBOxygenCNitrogen monoxideDNitrogen dioxide

51 mark(s)

Which of the following is an example of a photochemical decomposition reaction?

ADecomposition of calcium carbonate by heatBDecomposition of silver chloride in sunlightCElectrolysis of waterDReaction of zinc with dilute sulphuric acid

61 mark(s)

Which of the following reactions is a displacement reaction?

A2H₂ + O₂ → 2H₂OBZn + CuSO₄ → ZnSO₄ + CuCNaOH + HCl → NaCl + H₂ODCaO + H₂O → Ca(OH)₂

71 mark(s)

Which of the following is a double displacement reaction?

A2KClO₃ → 2KCl + 3O₂BFe + CuSO₄ → FeSO₄ + CuC2Mg + O₂ → 2MgODAgNO₃ + NaCl → AgCl + NaNO₃

81 mark(s)

The white precipitate formed when barium chloride reacts with sodium sulphate is:

ASodium chlorideBBarium oxideCBarium sulphateDSodium sulphate

91 mark(s)

Which gas is generally evolved when a metal reacts with a dilute acid?

AOxygenBNitrogenCHydrogenDCarbon dioxide

101 mark(s)

Which of the following statements about rancidity is correct?

AIt occurs due to oxidation of oils and fats.BIt occurs due to the reduction of oils and fats.CIt is a type of neutralisation reaction.DIt occurs only in the absence of oxygen.