CBSE Class-10 Science: Questions 94 - 103 of 117

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Question number: 94

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

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Which type of chemical reaction occurs when Barium hydroxide and Ammonium chloride, are mixed together whether heat is released or absorbed?

Question number: 95

» Acids, Bases and Salts » How Strong Are Acid or Base Solutions? » Importance of pH in Everyday Life

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What is the normal pH of human blood?

Question number: 96

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

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How do we know that the chemical equation is balanced?

Question number: 97

» Acids, Bases and Salts » Chemical Properties of Acids and Bases » How Do Acids and Bases React With Each Other?

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What is a neutralization reaction?

Question number: 98

» Acids, Bases and Salts » Chemical Properties of Acids and Bases » Acids and Bases in the Laboratory

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Classify acids on the basis of their origin?

Question number: 99

» Acids, Bases and Salts » Common Characteristics of Acids and Bases » Acid or a Base in a Water Solution

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While diluting the acid, why is it recommended that acids should be added to water and not water to acid?

Question number: 100

» Acids, Bases and Salts » Chemical Properties of Acids and Bases » How Do Acids and Bases React With Metals?

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Why curd or sour substance should not be kept in brass or copper container?

Question number: 101

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

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Which is the reaction which forms insoluble salts?

Question number: 102

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

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What is the concept of white washing of the walls?

Question number: 103

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

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A water insoluble substance ‘X’ when reacts with dilute H2SO4 released a colourless and odourless gas with a brisk effervescence. When this gas was passed through water, the solution so obtained turned blue litmus red. On passing this gas through lime water, it initially became milky and the milkiness disappeared when the gas was passed in excess. What is the substance ‘X’ and write the chemical equations of the reaction involved?

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