Check the below Online Education NCERT MCQ Questions for Class 7 Science Chapter 5 Acids, Bases and Salts with Answers Pdf free download. MCQ Questions for Class 7 Science with Answers were prepared based on the latest exam pattern. We have Provided Acids, Bases and Salts Class 7 Science MCQs Questions with Answers to help students understand the concept very well. https://ncertmcq.com/mcq-questions-for-class-7-science-with-answers/
You can refer to NCERT Solutions for Class 7 Science Chapter 5 Acids, Bases and Salts to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.
Online Education for Acids, Bases and Salts Class 7 MCQs Questions with Answers
Choose the correct answer:
Class 7 Science Chapter 5 MCQ Question 1.
An oxide is acidic and has a pungent odour. It could be
(a) sulphur dioxide
(b) carbon dioxide
(c) sodium oxide
(d) nitrogen dioxide
Answer
Answer: (d) nitrogen dioxide
Acid Bases And Salts Class 7 MCQ With Answers Question 2.
Out of these gases which one is used in fire extinguishers
(a) CO2
(b) SO2
(c) NO2
(d) H2S
Answer
Answer: (a) CO2
MCQ Questions For Class 7 Science Chapter 5 Question 3.
The correct way of making a solution of acid in water is to
(a) add water to acid
(b) add acid to water
(c) mix acid and water simultaneously
(d) add water to acid in a shallow container
Answer
Answer: (b) add acid to water
Acids Bases And Salts Class 7 MCQ Question 4.
Products of a neutralisation reaction are always:
(a) an acid and a base
(b) an acid and a salt
(c) a salt and water
(d) a salt and a base
Answer
Answer: (c) a salt and water
Class 7 Science Ch 5 MCQ Question 5.
Turmeric is a natural indicator. On adding its paste to acid and base separately, which colours would be observed.
(a) Yellow in both acid and base
(b) Yellow in acid and red in base
(c) Pink in acid and yellow in base
(d) Red in acid and blue in base
Answer
Answer: (b) Yellow in acid and red in base
Ncert Class 7 Science Chapter 5 MCQ Question 6.
Phenolphthalein is a synthetic indicator and its colours in acidic and basic solutions, respectively are:
(a) red and blue
(b) blue and red
(c) pink and colourless
(d) colourless and pink
Answer
Answer: (d) colourless and pink
Science Class 7 Chapter 5 MCQ Question 7.
When the soil is too basic, plants do not grow well in it. To improve its quality what must be added to the soil?
(a) Organic matter
(b) Quick lime
(c) Slaked lime
(d) Calamine solution
Answer
Answer: (a) Organic matter
Class 7 Chapter 5 Science MCQ Question 8.
Which of the following set of substances contain acids?
(a) Grapes, lime water
(b) Vinegar, soap
(c) Curd, milk of magnesia
(d) Curd, vinegar
Answer
Answer: (d) Curd, vinegar
Class 7th Science Chapter 5 MCQ Question 9.
On adding phenolphthalein indicator to a colourless solution, no change is observed. What is the nature of this solution?
(a) Basic
(b) Either acidic or basic
(c) Either acidic or neutral
(d) Either basic or neutral
Answer
Answer: (c) Either acidic or neutral
Acid Base And Salts Class 7 MCQ Question 10.
Which of the following is an acid-base indicator?
(a) Vinegar
(b) Lime water
(c) Turmeric
(d) Baking soda
Answer
Answer: (c) Turmeric
Match the following:
| Column A | Column B |
| (a) Vinegar | (i) changes red litmus blue |
| (b) Sodium chloride | (ii) is sour to taste |
| (c) Milk of magnesia | (iii) major salt of sea |
| (d) Potassium nitrate | (iv) used in fertilizer industry |
Answer
Answer:
| Column A | Column B |
| (a) Vinegar | (ii) is sour to taste |
| (b) Sodium chloride | (iii) major salt of sea |
| (c) Milk of magnesia | (i) changes red litmus blue |
| (d) Potassium nitrate | (iv) used in fertilizer industry |
Fill in the blanks:
1. A solution of ammonium chloride turns blue litmus ………………..
Answer
Answer: red
2. A solution of sodium acetate turns red ……………….. blue.
Answer
Answer: litmus
3. Ammonium chloride is an example of ………………..
Answer
Answer: acidic salf
4. Acid + Metal → Salt + ………………..
Answer
Answer: Hydrogen
5. An acid and a base react together forming a new compound, known as ………………..
Answer
Answer: salt
6. Tap water is very ……………….. of electricity.
Answer
Answer: poor conductor
7. Corrosion is a ……………….. process.
Answer
Answer: slow
8. All soluble hydroxides are ………………..
Answer
Answer: alkalies
9. Methyl orange is an ………………..
Answer
Answer: indicator
10. ……………….. is used for manufacturing washing soda and baking soda.
Answer
Answer: Sodium chloride
11. Acetic acid is present in ……………….. while ……………….. is present in lemon.
Answer
Answer: vinegar, citric acid
12. Carbon burns in air to form ……………….. It is ……………….. oxide. Its aqueous solution turns ……………….. litmus ………………..
Answer
Answer: carbon dioxide, acidic, blue, red
13. The gas which escapes out from many aerated soft drinks is ………………..
Answer
Answer: carbon dioxide
14. An aqueous solution of sodium oxide changes ……………….. litm us blue.
Answer
Answer: red
15. The chemical formula of lime water is ………………..
Answer
Answer: Ca (OH)2
16. Neutralisation is the reaction between an acid and a ……………….. to form ………………. and ………………..
Answer
Answer: base, salt, water
17. ……………….. reacts with lime water to produce ……………….. which is milky in appearance because it is ……………….. in water.
Answer
Answer: CO2, calcium carbonate, soluble
Choose the true and false statements from the following:
1. Ammonia, dissolved in water, shows acidic properties.
Answer
Answer: False.
Explanation:
Correct Statement – Ammonia dissolved in water shows basic properties.
2. Orange juice turns blue litmus red.
Answer
Answer: True.
Explanation:
Because orange juice acts as acid.
3. Copper does not react with tamarind (imli) water.
Answer
Answer: True.
Explanation:
Due to less reactivity.
4. Alum (phitkari) acts as an antacid.
Answer
Answer: False.
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