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=Question 1

=Question 2

=Question 3

=Question 4

=Question 5, 6

=Question 7, 8, 9

=Question 10, 11

 

Question 5. Classify each of the following as a homogeneous or heterogeneous mixture.
Question 6. How would you confirm that a colourless liquid given to you is pure water?

Question 5. Classify each of the following as a homogeneous or heterogeneous mixture.
Soda water, wood, air, soil, vinegar, filtered tea.
Answer:

Homogeneous mixtures: Soda water, air, vinegar and filtered tea.
Heterogeneous mixtures: wood and soil.

Question 6. How would you confirm that a colourless liquid given to you is pure water?
Answer:
Take a sample of colourless liquid and put on stove if it starts boiling exactly at 100 ÂșC then it is pure water. Any other colourless liquid such as vinegar always have different boiling point. Also observe carefully that after some time whole liquid will convert into vapour without leaving any residue.



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Question 5. Classify each of the following as a homogeneous or heterogeneous mixture. r

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