Chemical Reactions and Equation-Types of Chemical Reactions (CBSE (Central Board of Secondary Education- Board Exam) Class-10 Science): Questions 15 - 26 of 34

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Question number: 15

» Chemical Reactions and Equation » Types of Chemical Reactions » Decomposition Reaction

Essay Question▾

Describe in Detail

Describe the process of electrolysis of water with the help of a well labelled diagram?

Explanation

Electrolysis of water: It is the decomposition of water into Hydrogen and Oxygen gas, when an electric current is passed through water.

Electrolysis of water

Electrolysis of Water

Process of electrolysis of water

Question number: 16

» Chemical Reactions and Equation » Types of Chemical Reactions » Oxidation and Reduction

Short Answer Question▾

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Write down the chemical reactions for rust formation?

Question number: 17

» Chemical Reactions and Equation » Types of Chemical Reactions » Decomposition Reaction

Short Answer Question▾

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Write a note on decomposition reactions?

Question number: 18

» Chemical Reactions and Equation » Types of Chemical Reactions » Decomposition Reaction

One Liner Question▾

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What is thermal decomposition reaction?

Question number: 19

» Chemical Reactions and Equation » Types of Chemical Reactions » Oxidation and Reduction

One Liner Question▾

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What is the composition of Rust?

Question number: 20

» Chemical Reactions and Equation » Types of Chemical Reactions » Oxidation and Reduction

One Liner Question▾

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Q22. Which of the two is a redox reaction?

a) Double displacement

b) Displacement

Question number: 21

» Chemical Reactions and Equation » Types of Chemical Reactions » Displacement Reaction

One Liner Question▾

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When a more reactive metal displaces a less reactive metal in solution, Then the reaction is known as?

Question number: 22

» Chemical Reactions and Equation » Types of Chemical Reactions » Decomposition Reaction

One Liner Question▾

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Blue crystals of copper sulphate on heating in a dry test tube become colourless. Give reasons.

Question number: 23

» Chemical Reactions and Equation » Types of Chemical Reactions » Combination Reaction

Short Answer Question▾

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What is the difference between endothermic and exothermic reactions?

Question number: 24

» Chemical Reactions and Equation » Types of Chemical Reactions » Double Displacement Reaction

Short Answer Question▾

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What are the various applications and uses of double displacement reactions?

Question number: 25

» Chemical Reactions and Equation » Chemical Equations » Writing a Chemical Equation

» Chemical Reactions and Equation » Types of Chemical Reactions » Combination Reaction

Short Answer Question▾

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Why lime water turns milky, when carbon di-oxide gas is passed through it?

Question number: 26

» Chemical Reactions and Equation » Types of Chemical Reactions » Displacement Reaction

Short Answer Question▾

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A, B and C are three elements which reacts chemically in the following way

A2O3 + 2B → B2O3 + 2A

3CSO4 + 2B → B2 (SO4) 3 + 3C

3CO + 2A → A2O3 +3C

Answer the following

(A) Which element is most reactive?

(B) Which element is least reactive?

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