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Questions and Answers
What is the correct observation when red litmus paper is dipped into a 20% sodium hydroxide solution?
When a student adds 2 ml of water to 2 ml of acetic acid in a test tube, what is the likely observation?
After adding 4 ml of acetic acid to 4 ml of distilled water in a test tube, what does the student observe after leaving it to settle for about 10 minutes?
How can a student test for the gas liberated when hydrochloric acid reacts with an active metal?
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Which pH value indicates a stronger acid, pH=5 or pH=2?
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What is the solution that reacts with crushed egg shells to give a gas that turns lime milky?
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Why does tooth decay start when pH of mouth is lower than 5.5?
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When fresh milk changes into curd, will its pH value increase or decrease? Why?
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Why does the flow of acid rainwater into a river make the survival of aquatic life difficult?
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How does the flow of acid rain water into a river make the survival of aquatic life difficult?
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Which observation is true about a dilute solution of acetic acid?
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What happens to the pH value of an aqueous solution when an acid and a base are mixed together?
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Why does a solution react with crushed egg shells to produce a gas that turns lime milky?
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What gas is produced when a solution reacts with crushed eggshells to turn lime milky?
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What happens to the pH value when fresh milk changes into curd (yogurt)?
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Why does the flow of acid rain water into a river make the survival of aquatic life difficult?
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Which observation is true about a dilute solution of acetic acid?
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What is the likely observation when a student tests for the gas liberated when hydrochloric acid reacts with an active metal?
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What is the correct observation when red litmus paper is dipped into a 20% sodium hydroxide solution?
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What can a student observe when red litmus paper is dipped into a 20% sodium hydroxide solution?
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What happens when a student adds 2 ml of water to 2 ml of acetic acid in a test tube?
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After adding 4 ml of acetic acid to 4 ml of distilled water in a test tube, what does the student observe after leaving it to settle for about 10 minutes?
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How can a student test for the gas liberated when hydrochloric acid reacts with an active metal?
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Which observation is true about a dilute solution of acetic acid?
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Why does tooth decay start when pH of mouth is lower than 5.5?
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Why does flow of acid rain water into a river make the survival of aquatic life difficult?
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What is the correct observation when red litmus paper is dipped into a 20% sodium hydroxide solution?
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