Chemical Reactions and Equation (CBSE (Central Board of Secondary Education- Board Exam) Class-10 Science): Questions 1 - 11 of 102

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Question number: 1

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

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What happens when electric current is passed through acidified water?

Question number: 2

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

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What is the basic criteria to write a chemical equation?

Question number: 3

» Chemical Reactions and Equation » Oxidation Reactions » Corrosion

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Neha has been collecting silver coins and copper coins. After few days she observed a black coating on silver coins and a green coating on copper coins. Why the coins were coated with black and green coatings? Write the chemical name of black and green coatings.

Question number: 4

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

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Write down a type of double displacement reaction?

Question number: 5

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

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What is oxidation reaction?

Question number: 6

» Chemical Reactions and Equation » Chemical Equations » Balanced Chemical Equations

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What is a balanced chemical equation? And why is it important to balance a chemical equation?

Question number: 7

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

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Identify the type of reaction: Na2SO4 + BaCl2 – > BaSO4 +2NaCl?

Question number: 8

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

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What is the name of group of chemical substances used to prevent oxidation?

Question number: 9

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

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What chemical law is the basis of, balancing of chemical equation?

Question number: 10

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

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Silver articles get black coating when in contact with air. Name the phenomenon

Question number: 11

» Chemical Reactions and Equation » Oxidation Reactions » Rancidity

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While packing food articles, why do manufacturers flush out oxygen with nitrogen?

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