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

Identify the reducing agent in the following reactions 4NH3 + 5O2 → 4NO + 6H2O

2 / 15

Identify the reducing agent in the following reactions: Fe2O3 + 3CO → 2Fe + 3CO2

3 / 15

When hydrogen sulphide gas is passed through a blue solution of copper sulphate, the colour of the solution fades and a black precipitate is obtained.Why does the colour of the solution fades?

4 / 15

Mention whether it is physical or chemical changes:- Burning of Liquefied Petroleum Gas (LPG)

5 / 15

Mention whether it is physical or chemical changes :Curdling of milk

6 / 15

Mention whether it is physical or chemical changes: Sublimation of solid ammonium chloride

7 / 15

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

8 / 15

State the reactions exothermic or endothermic in nature: Dilution of sulphuric acid

9 / 15

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

10 / 15

In the electrolysis of water, name the gases liberated at anode

11 / 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

12 / 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

13 / 15

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

14 / 15

Which of the subsequent does show an oxidation reaction

15 / 15

Barium chloride on reacting with ammonium sulphate forms barium sulphate and ammonium chloride. Which of the following correctly represents the type of reaction involved?

  1. Displacement reaction

  2. Precipitation reaction

  3. Combination reaction

  4. Double displacement reaction

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