Chemical Reactions and Equation (CBSE Class-10 Science): Questions 67 - 74 of 74

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Question number: 67

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

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What is respiration in human beings?

Question number: 68

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

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

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Explain why the marble statues often get corroded slowly when kept in open for a long time?

Question number: 69

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

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Name the key ingredient required in the manufacturing of cement?

Question number: 70

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

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Write down the reaction for decomposition of ferrous sulphate?

Question number: 71

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

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What is double displacement reaction?

Question number: 72

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

» Chemical Reactions and Equation » Chemical Equations » Writing Symbols of Physical States

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What does the symbol (g) used with water represents?

Question number: 73

» Chemical Reactions and Equation » Oxidation Reactions » Corrosion

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Write a note on process of corrosion?

Explanation

Corrosion is the process by which metals are eaten away layer by layer, by the action of air, moisture or chemicals on their surface.

Iron when exposed to moist air for a long time acquires a coating of a brown flaky substance called rust.

Silver articles become black after some… (90 more words) …

Question number: 74

» Chemical Reactions and Equation » Oxidation Reactions » Corrosion

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What is the process of corrosion?

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