Types of Chemical Reactions Two Marks Questions

10th Standard EM

    Reg.No. :
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Science

Time : 00:45:00 Hrs
Total Marks : 20
    10 x 2 = 20
  1. When an aqueous solution of potassium chloride is added to an aqueous solution of silver nitrate, a white precipitate is formed. Give thr chemical equation of this reaction

  2. Why does the reaction rate of a reaction increase on raising the temperature?

  3. Define combination reaction. Give one example for an exothermic combination reaction

  4. Differentiate reversible and irreversible reactions

  5. Define pH.

  6. What is called universal pH indicator?

  7. Powdered calcium carbonate reacts more readily with hydrochloric acid than marble chips. Give reasons.

  8. Define irreversible reaction.

  9. Define equilibrium state.

  10. A strip of a metal X is immersed in the aqueous solution of salt YSO4 blue in colour. After sometime, a layer the metal Y from the salt solution is deposited on the strip of the metal X. Whereas the metal X is used for galvanisation, the metal Y is employed in maktng electric cables.
    1. Predict the metal X.
    2. What could be the metal Y?
    3. Can you name the salt YSO4?
    4. What is the nature of the chemical reaction taking place?

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