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Chapter 1 Matter in Our Surrounding Class 9 Science NCERT Solutions

Class 9 Science NCERT Solutions Chapter 1: Matter in Our Surrounding is developed and witten by our expert teachers. Students can study our solutions of Chapter 1: Matter in Our Surrounding class 9 Science, Question 1. Convert the following temperatures to the Celsius scale. (a) 293 K (b) 470 K. Question 2. Convert the following temperatures to the Kelvin scale. (a) 25°C (b) 373°C., Question 3. Give reason for the following observations. (a) Naphthalene balls disappear with time without leaving any solid. (b) We can get the smell of perfume sitting several metres away. Question 4. Arrange the following substances in increasing order of forces of attraction between the particles— water, sugar, oxygen. , Question 5. What is the physical state of water at (a) 25°C (b) 0°C (c) 100°C? Question 6. Give two reasons to justify (a) Water at room temperature is a liquid. (b) an iron almirah is a solid at room temperature. Question 7. Why is ice at 273 K more effective in cooling than water at the same temperature?, Question 8. What produces more severe burns, boiling water or steam?Question 9. Name A, B, C, D, E and F in the following diagram showing change in its state .

NCERT Solutions Class 9 Science
Chapter 1: Matter in Our Surrounding
Exercise Answers

=Question 1. Convert the following temperatures to the Celsius scale.
(a) 293 K (b) 470 K.
Question 2. Convert the following temperatures to the Kelvin scale.
(a) 25°C (b) 373°C.

Question 1. Convert the following

=Question 3. Give reason for the following observations.
(a) Naphthalene balls disappear with time without leaving any solid.
(b) We can get the smell of perfume sitting several metres away.
Question 4. Arrange the following substances in increasing order of forces of attraction between the particles— water, sugar, oxygen.

Question 3. Give reason for the

=Question 5. What is the physical state of water at (a) 25°C (b) 0°C (c) 100°C?
Question 6. Give two reasons to justify
(a) Water at room temperature is a liquid.
(b) an iron almirah is a solid at room temperature.
Question 7. Why is ice at 273 K more effective in cooling than water at the same temperature?

Question 5. What is the physical state

=Question 8. What produces more severe burns, boiling water or steam?
Question 9. Name A, B, C, D, E and F in the following diagram showing change in its state

Question 8. What produces more severe

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