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

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

2 / 15

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

3 / 15

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

4 / 15

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

5 / 15

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

6 / 15

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

7 / 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

8 / 15

Electrolysis of water is a decomposition reaction. The mole ratio of hydrogen and oxygen gases liberated during the electrolysis of water is:

9 / 15

When hydrogen sulphide gas is passed through a blue solution of copper sulphate a black precipitate of copper sulphide is obtained and the sulphuric acid so formed remain in the solution. The reaction is an example of a:

10 / 15

When copper turning are added to silver nitrate solution, a blue coloured solution is formed after some time. It is because copper ?

11 / 15

which of the subsequent chemical equations do the abbreviations represent the correct states of the reactants and products involved at reaction temperature?

12 / 15

One of the following does not happen during a chemical reaction.

13 / 15

The following reaction is an example of a: 4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g)

  1. Displacement reaction
  2. Combination reaction
  3. Redox reaction
  4. Neutralisation reaction

14 / 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

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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