Consider the following statements:
(a) Both acids and bases change colour of all indicators.
(b) If an indicator gives a colour change with an acid, it does not give a change with a base.
(c) If an indicator changes colour with a base, it does not change colour with an acid.
(d) Change of colour in an acid and a base depends on the type of the indicator.
Which of these statements are correct?
(i) All four
(ii) a and d
(iii) b, c and d
(iv) only d
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(iv) Only d is correct
Important topics covered in NCERT Solutions for Class 7 Chapter 5 Acids, Bases and Salts| Section Number | Topic |
| 1 | Acids and Bases |
| 2 | Natural Indicators around Us |
| 3 | Neutralisation |
| 4 | Neutralisations in Everyday Life |
The combination of acid and base results in the formation of salts which can either be acidic, basic or neutral in nature. This process is known as neutralisation. Neutralisation is a very important topic with respect to examination. To avoid confusion between acids, bases and salts, make a comparison table of them.
Acids, bases and salts are common in our everyday life. It is important to know their properties to exploit their advantages and prevent their dangers. From the exam point of view, neutralisation and its application are important. All the topics in this chapter are covered in the Class 7 NCERT Solutions for Science. Download the free PDF provided here, and if necessary, take a printout to keep it handy during the preparation for exams.
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