Acids, Bases and Salts (CBSE (Central Board of Secondary Education- Board Exam) Class-10 Science): Questions 39 - 43 of 43

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Question number: 39

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

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Write down a note on properties of bases?

Question number: 40

» Acids, Bases and Salts » How Strong Are Acid or Base Solutions? » pH Scale

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What are olfactory indicators?

Question number: 41

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

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In a first aid manual it was suggested that vinegar should be used to treat wasp sting and baking soda for bee stings.

(i) What does this information tell you about the chemical nature of the wasp stings

(ii) If there were no baking soda in the house, what other household substance could you use to treat bee stings?

Question number: 42

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

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Sneha and Shivam want to prepare dilute H2SO4. Sneha added concentrated H2SO4 to water slowly with constant stirring& cooling whereas, Shivam added water to concentrated H2SO4. Name the student who was correct and why?

Question number: 43

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

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Write a note on, addition of acids and bases into water. What precautions to be taken and why?

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