Science : Ch 01 – Chemical Reactions and Equations

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Notes

  • This quiz contains 10 question from Chapter 1 – Chemical Reactions and Equations
  • Each question carry one mark
  • You can practice the quiz till the time you are prefect.
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Science : Ch 01 - Chemical Reactions and Equations

This test is designed based on NCERT Syllabus for Class 10 Topics : Chemical Reactions and Equations

  • Each time random 15 questions will be displaced
  • So retake the quiz till you have mastered all the questions

1 / 15

What happens when sodium sulphate solution is added to barium chloride solution?

2 / 15

Why are anti-oxidants added to fat and oil containing food items?

3 / 15

Why are oil and fat containing food items fushed with nitrogen while packing?

4 / 15

Identify the reducing agent in the following reactions: 2H2 + O2 → 2H2O

5 / 15

Mention whether it is a physical or chemical changes: -Evaporation of petrol

6 / 15

State the reactions are exothermic or endothermic in nature: Decomposition of ferrous sulphate

7 / 15

Sate the reactions exothermic or endothermic in nature: Dissolution of sodium hydroxide in water

8 / 15

State the reactions are exothermic or endothermic in nature: Dissolution of ammonium chloride in water

9 / 15

Solid calcium oxide reacts vigorously with water to form calcium hydroxide, accompanied by liberation of heat. This process is called slaking of lime. Calcium hydroxide dissolves in water to form a solution called lime water. Which among the following is (are) true about slaking of lime and the solution formed?

  1. It is an endothermic reaction

  2. It is an exothermic reaction.

  3. The pH of the resulting solution will be more than seven.

  4. The pH of the resulting solution will be less than seven

10 / 15

Which of the subsequent is (are) an endothermic process(es)?

  1. Dilution of sulphuric acid

  2. Sublimation of dry ice

  3. Condensation of water vapours

  4. Evaporation of water

11 / 15

Which of the following is not a physical change?

12 / 15

Which of the following gases can be used for the storage of fresh sample of an oil for a long duration?

13 / 15

You are given the solution of lead nitrate. In order to obtain a yellow precipitate you should blend with it a solution of:

14 / 15

Which of the subsequent does show an oxidation reaction

15 / 15

Which of the following are combination reactions?

  1. KClO3   →(Heat)→ 2KCl + 3O2

  2. MgO + H2O → Mg(OH)2

  3. 4Al + 3O2 → 2Al2O3

  4. Zn + FeSO4 →ZnSO4 + Fe

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