Table 2.2 Class 10 Science Solutions

Here, we will go through Table 2.2 class 10 science solution that describes the `P^H` values and nature of the given substances. After finding the `P^H` value, we can decide the nature of the substances. This table has been taken from Chapter 2 Acids, Bases and Salts.

Following is the table 2.2 Science class 10

 

 

 

 

We test the given solutions with the help of `P^H` paper. We find changes in the colour of the `P^H` paper and decide the nature of solutions.

 

S. No.	solution	Colour of PH paper	Approximate PH value	Nature of solutions
1	Saliva (before meal)	Green	6.5 to 7.5	Acidic to basic
2	Saliva (after meal)	Yellow-green	2.2 to 2.4	Acidic
3	Lemon juice	Orange	5.9 to 6.0	Acidic
4	Colourless aerated drink	Yellow	5.9-6.0	Acidic
5	Carrot juice	Yellow-green	6.4- 6.6	Acidic
6	Coffee	Yellow	4.5 -5.5	Acidic
7	Tomato juice	Yellow	4.31	Acidic
8	Tap water	Green	6-8.5
9	1MNaOH	Dark blue	14	Basic
10	1MHCl	Red	0	Acidic

 

 

    Quiz on table 2.2 class 10 science solutions

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Table 2.1 Class 10 Science

FAQs

1. What is `P^H`?

 Ans – `P^H` is the negative logarithm of the concentration of hydrogen ions. It is used to measure the acidity or alkalinity of solutions.

2. What is a universal indicator?

 Ans – A universal indicator is a chemical solution or paper that has a wide PH range

3. Is saliva acidic or basic class 10?

Ans – Saliva is slightly acidic before meals but after meals, it becomes more acidic.

4. Why tap water is not neutral in nature?

 Ans- Tap water has a `P^H` near 7 (neutral) but due to salt and minerals dissolving, it may exhibit an acidic or basic nature.

Related Topics 

1. Formation of Sodium ion

2. Formation of chloride ion

3. Chemical Properties of Metals

4. Physical Properties of Metals