Acids, Bases and Salts Part 2
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Question 1 of 8
1. Question
Which of the following statements is/are correct for litmus?
1. Litmus solution is a purple dye.
2. It is extracted from lichen.
3. In neutral solution, it remains colourless.CorrectIncorrect -
Question 2 of 8
2. Question
Which of the following is/are correct for olfactory indicators?
1. Their colour changes with acid or base.
2. Onion, vanilla or clove are examples.CorrectIncorrect -
Question 3 of 8
3. Question
Which of the following are correctly matched?
1. Acid + Salt ————————————————————— metal + hydrogen.
2. Acid + metal carbonate ———————————- salt + carbon dioxide + water.
3. Metal oxide + acid ————————————————————- salt + water.CorrectIncorrect -
Question 4 of 8
4. Question
Which of the following is/are correct for diluting acid?
1. Adding acid to water by stirring.
2. Adding water to acid by stirring.CorrectIncorrect -
Question 5 of 8
5. Question
Which of the following is/are correct for pH?
1. A scale for measuring hydronium ion concentration.
2. Values less than 7 on the pH scale represent an acidic solution.
3. As the pH value increases from 7 to 14, it represents an increase in hydrogen ion
concentration in the solution.CorrectIncorrect -
Question 6 of 8
6. Question
Which of the following are correctly matched?
1. Plants and animals ————————————————- pH range is 7.0 to 7.8 .
2. Rain Water ————————————————————————- pH is 7.6 .
3. Tooth decay ————————————————————— pH less than 5.5 .CorrectIncorrect -
Question 7 of 8
7. Question
Which of the following are correctly matched?
1. Common salt —————— formed by sodium hydroxide and hydrochloric acid.
2. Brine ———————————————- aqueous solution of sodium chloride.
3. Chlor-alkali process ————————————–formation of sodium chloride.CorrectIncorrect -
Question 8 of 8
8. Question
Which of the following are correctly matched?
1. Bleaching powder —————————– oxidising agent in chemical industries.
2. Baking powder ——– a mixture of sodium hydrogen carbonate and a mild edible
acid.
3. Washing soda ———————————- remove permanent hardness of water.CorrectIncorrect