Acid Bases and Salts Class 7 Worksheet with Answers. We covered all the Acid Bases and Salts Class 7 Worksheet with Answers in this post for free so that you can practice well for the exam.
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Acid Bases and Salts Class 7 Worksheet Objective with Answers for Students
Which of the following are correctly matched? 1. Plants and animals – pH range is 7.0 to 7.8 2. Rainwater – pH is 7.6 3. Tooth decay – pH less than 5.5
(a) 1 and 2
(b) 2 and 3
(c) 1 and 3
(d) 1, 2 and 3
Option c – 1 and 3
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
(a) 1 and 2
(b) 2 and 3
(c) 1 and 3
(d) 1, 2 and 3
Option a – 1 and 2
Which of the following are correctly matched? 1. Bleaching powder – chemical industries 2. Baking powder – hydrogen carbonate and a mild edible acid 3. Washing soda – hardness of water
(a) I and 2
(b) 2 and 3
(c) 1 and 3
(d) 1, 2 and 3
Option d – 1, 2 and 3
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
(a) 1 and 2
(b) 2 and 3
(c) 1 and 3
(d) 1, 2 and 3
Option b – 2 and 3
Which of the following is/are correct for diluting acid? 1. Adding acid to water by stirring. 2. Adding water to acid by stirring.
(a) Only 1
(b) Only 2
(c) Both 1 and 2
(d) Neither 1 nor 2
Option a – Only 1
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.
(a) Only 1
(b) Only 2
(c) Only 3
(d) 1, 2 and 3
Option b – Only 2
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 a neutral solution, it remains colorless.
(a) 1 and 2
(b) 2 and 3
(c) 1 and 3
(d) 1, 2 and 3
Option a – 1 and 2
Which of the following is/are correct for olfactory indicators? 1. Their color changes with acid or base. 2. Onion, vanilla, or clove are examples.
(a) Only 1
(b) Only 2
(c) Both 1 and 2
(d) Neither 1 nor 2
Option b – Only 2
We covered all the acid bases and salts class 7 worksheet objectives with answers above in this post for free so that you can practice well for the exam.
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