MEDIUM
10th CBSE
IMPORTANT
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Electrolysis of water is a decomposition reaction. The mole ratio of hydrogen and oxygen during electrolysis of water is

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Important Questions on Chemical Reactions and Equations

MEDIUM
10th CBSE
IMPORTANT
MODERN'S ABC+ OF SCIENCE CHEMISTRY>Chapter 1 - Chemical Reactions and Equations>TEST YOURSELF>Q 13
Barium chloride on reacting with ammonium sulphate forms barium sulphate and ammonium chloride. Which of the following correctly represents the type of the reaction involved?
(i) Displacement reaction
(ii) Precipitation reaction
(iii) Combination reaction
(iv) Double displacement reaction
MEDIUM
10th CBSE
IMPORTANT
MODERN'S ABC+ OF SCIENCE CHEMISTRY>Chapter 1 - Chemical Reactions and Equations>TEST YOURSELF>Q 14
Rahul took some zinc granules in a test tube and added dilute HCl to it. He observed that the colour of zinc granules changed to.
EASY
10th CBSE
IMPORTANT
MODERN'S ABC+ OF SCIENCE CHEMISTRY>Chapter 1 - Chemical Reactions and Equations>TEST YOURSELF>Q 15
Carbon dioxide turns the lime water milky due to the formation of
MEDIUM
10th CBSE
IMPORTANT
MODERN'S ABC+ OF SCIENCE CHEMISTRY>Chapter 1 - Chemical Reactions and Equations>TEST YOURSELF>Q 16

Solid calcium oxide was taken in a container and water was added slowly to it.
State the two observations made in the experiment.
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EASY
10th CBSE
IMPORTANT
MODERN'S ABC+ OF SCIENCE CHEMISTRY>Chapter 1 - Chemical Reactions and Equations>TEST YOURSELF>Q 16

Solid calcium oxide was taken in a container and water was added slowly to it.

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Write the name and the chemical formula of the product formed.

MEDIUM
10th CBSE
IMPORTANT
MODERN'S ABC+ OF SCIENCE CHEMISTRY>Chapter 1 - Chemical Reactions and Equations>TEST YOURSELF>Q 17
Crystals of copper sulphate are heated in a test tube for some time.
(a) What is the colour of copper sulphate crystals
(i) before heating and
(ii) After heating.
EASY
10th CBSE
IMPORTANT
MODERN'S ABC+ OF SCIENCE CHEMISTRY>Chapter 1 - Chemical Reactions and Equations>TEST YOURSELF>Q 17
Crystals of copper sulphate are heated in a test tube for some time.
What is the source of liquid droplets seen on the inner upper side of the test tube during the heating process?
MEDIUM
10th CBSE
IMPORTANT
MODERN'S ABC+ OF SCIENCE CHEMISTRY>Chapter 1 - Chemical Reactions and Equations>Revision Exercise>Q 1

Write the balanced chemical equation for the following reaction:

Zinc carbonate (s) →Zinc oxide (s) + Carbon dioxide (g).