Complete the following table: S. No Solution Indicator Initial colour of indicator Final colour of indicator 1 Milk of magnesia Phenolphthalein 2 Vinegar Red 3 Shampoo Yellow 4 Soap solution China Rose 5 Sodium hydroxide Pink 6 Slaked lime Purple Green

Completed table is as follows: Milk of magnesia is basic. Therefore, it is pink in colour. Vinegar is weakly acidic, therefore, it turns blue litmus to red. The shampoo is basic; therefore, natural indicator turmeric changes its colour from yellow to red. Soap solution contains sodium hydroxide, which is a base, and it turns china rose to green. Sodium hydroxide is a base, and hence phenolphthalein turns into pink. Slaked lime is calcium hydroxide, which is a base and it turns china grass from purple to green. S. No Solution Indicator Initial colour of indicator Final colour of the indicator 1 Milk of magnesia Phenolphthalein Colourless Pink 2 Vinegar Blue litmus paper Purple Red 3 Shampoo Turmeric Yellow Red 4 Soap solution China Rose Purple Green 5 Sodium hydroxide Phenolphthalein Colourless Pink 6 Slaked lime China rose Purple Green

E M B I B E

WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 8 - Acids, Bases and Salts>WORKSHEET

Archana Shukla Solutions for Chapter: Acids, Bases and Salts, Exercise 11: WORKSHEET

Author:Archana Shukla

Archana Shukla Science Solutions for Exercise - Archana Shukla Solutions for Chapter: Acids, Bases and Salts, Exercise 11: WORKSHEET

Attempt the free practice questions on Chapter 8: Acids, Bases and Salts, Exercise 11: WORKSHEET with hints and solutions to strengthen your understanding. WOW! SCIENCE Hands-on Learning in SCIENCE 7 solutions are prepared by Experienced Embibe Experts.

Questions from Archana Shukla Solutions for Chapter: Acids, Bases and Salts, Exercise 11: WORKSHEET with Hints & Solutions

MEDIUM

7th CBSE

IMPORTANT

WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 8 - Acids, Bases and Salts>WORKSHEET>Q A

Solve the following crossword.

Across

1. This acid is present in oranges
3. Turmeric paper turns to this colour when dipped in a basic medium
5. This is a solution of nitric acid and hydrochloric acid in the ratio $1 : 3$
7. Magnesium hydroxide is used as
8. This is known as king of acids

Down

2. This acid is present in grapes
4. Bitter substances contain this chemical
6. Water soluble bases

Question Image

MEDIUM

7th CBSE

IMPORTANT

WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 8 - Acids, Bases and Salts>WORKSHEET>Q B

Complete the following table:

S. No	Solution	Indicator	Initial colour of indicator	Final colour of indicator
1	Milk of magnesia	Phenolphthalein
2	Vinegar			Red
3	Shampoo		Yellow
4	Soap solution	China Rose
5	Sodium hydroxide			Pink
6	Slaked lime		Purple	Green

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