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Chapter 2– CHEMICAL CHANGES AND REACTIONS

Quiz by Trishna Sharma

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30 questions
Show answers
  • Q1

    1

    Question Image

    b

    a

    d

    c

    30s
  • Q2

    2. Which of the following are exothermic processes? (i) Reaction of water with quicklime (ii) Dilution of an acid (iii) Evaporation of water (iv) Sublimation of camphor (crystals)

    (i) and (iv)

    (i) and (ii)

    (ii) and (iv)

    (ii) and (iii)

    30s
  • Q3

    3. Oxidation is a process which involves

    removal of oxygen

    addition of hydrogen

    addition of oxygen

    removal of nitrogen

    30s
  • Q4

    4. The process of reduction involves

    removal of nitrogen

    addition of oxygen

    addition of hydrogen

    addition of nitrogen

    30s
  • Q5

    5. What type of chemical reactions take place when electricity is passed through water?

    Double displacement

    Decomposition

    Displacement

    Combination

    30s
  • Q6

    6. Name the products formed when iron filings are heated with dilute hydrochloric acid

    Fe (II) chloride and hydrogen gas

    Fe (III) chloride and water

    Fe (II) chloride and water

    Fe (III) chloride and hydrogen gas

    30s
  • Q7

    7. Pb + CuCl 2  → PbCl 2  + Cu The above reaction is an example of:

    displacement

    double displacement

    combination 

    decomposition

    30s
  • Q8

    8. Which of the following reactions can also be termed as thermal decomposition reaction?

    Combination reaction

    Decomposition reaction

    Displacement reaction

    Double displacement reaction

    30s
  • Q9

    9. The condition produced by aerial oxidation of fats and oils in foods marked by unpleasant smell and taste is called:

    corrosion

    rancidity

    reduction

    antioxidation

    30s
  • Q10

    10. Which of the following is not a chemical change?

    Potassium is dissolved in water

    Iron is magnetized

    Rusting of iron

    Magnesium wire is burnt

    30s
  • Q11

    11. Formation of white precipitate on mixing sodium chloride solution and silver nitrate solution is an example of …………… reaction.

    Combination

    Double decomposition

    Decomposition

    Displacement

    30s
  • Q12

    12. Which one of these is a chemical change?

    Water changes to steam

    Combustion of LPG

    Liquefying ammonia

    Dissolution of sugar in water

    30s
  • Q13

    13. The reaction of neutralization is a:

    Combination reaction

    Double decomposition

    Combination reaction between two compounds

    Displacement reaction

    30s
  • Q14

    14. FeS + H 2 SO 4   FeSO 4  + H 2 S is an example of:

    Decomposition reaction

    Displacement reaction

    Double decomposition reaction

    Combination reaction

    30s
  • Q15

    15. Which of the following gases can be used for storage?

    Carbon dioxide or Helium

    Nitrogen or Oxygen

    Helium or Nitrogen

    Carbon dioxide or Oxygen

    30s

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