Science : Ch 01 – Chemical Reactions and Equations

0

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.
1

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

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

4 / 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.Write the chemical name of the black precipitate formed.

5 / 15

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

6 / 15

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

7 / 15

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

8 / 15

On heating blue coloured powder of copper (II) nitrate in a boiling tube, copper oxide (black), oxygen gas and a brown gas X is formed. Identify the brown gas X evolved.

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

Strong heating of ferrous sulphate leads to the formation of a brown solid and two gases. This reaction can be designated as:

11 / 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:

12 / 15

The following reaction is used for the preparation of oxygen gas in the laboratory: 2KClO3(s) Heat ⎯ → Catalyst ⎯⎯⎯ 2KCl(s) + 3O2(g) Which of the following statement(s) is/are correct about the reaction?

13 / 15

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

14 / 15

Which of the subsequent does show an oxidation reaction

15 / 15

Calcium oxide reacts vigorously with water to produce slaked lime. CaO(s) + H2O(l) → Ca(OH)2(aq) This reaction can be classified as:

  1. Combination reaction

  2. Exothermic reaction

  3. Endothermic reaction

  4. Oxidation reaction

Your score is

0%

Leave a Reply 0

Your email address will not be published. Required fields are marked *