Question

Solution
No.
Colour of Approx-Nature of
pH paper imate substance
pH value
1 Saliva (before meal)
2 Saliva (after meal)
3 Lemon juice
4 Colourless aerated
drink
5 Carrot juice
6 Coffee
7 Tomato juice
8 Tap water
9 1M NaOH
10 IM HCI
this is table 2.2 from ncert please fill it ​

Answer 1

Answer:

saliva (before meal)- 7.4 basic

saliva(atter meal)- 5.8 acidic

lemon juice- 2.5 acidic

colourless areated drink- 6.0 acidic

carrot juice- 4.0 acidic

coffee- 5.0 acidic

tomato juice-4.1 acidic

tap water- 7.0 neutral

1M NaOH- 13 to 14 basic

1M HCL - 1.0 acidic

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Answer 2

Answer:

pH of saliva before meal - bluish green colour

pH of saliva after meal - green

pH of tap water is green

pH of lemon juice is orange red

pH of tomato juice is yellowish orange

pH of carrot juice is yellow

pH of 1 M NaOH is purplish blue

pH of 1 M HCl is red.

pH of coffee is green

pH of colourless aerated drink is orange-red