(d) none of these
(c) gas
non metal
1a) Metal
Singid
9) Particles are compactly ore in
(a) Solid
(b) liquid
10) Cream is separated from milk by
(a) centrifugation (b) crystallization
(d) evaporation
(c) sublimation
Q2.Q/Ans
(b) 573 K
1. Convert the following temperature to Celsius scale(a) 300 K
2. What is the physical state of water at (a)250°C (b)100°C
3. For any substance why does the temperature remain constant during the change of state?
4. Suggest a method to liquefy atmospheric gases.
5. Write about the factors which affect evaporation.
6. Why do we prefer to wear cotton clothes in summer?
7. Why does our palm feel cold when we put some acetone or petrol or perfume on it?
8. Why are we able to sip hot tea or milk faster from a saucer rather than a cup?
9. Differentiate between distillation and fractional distillation.
10. Write physical properties of metals and non metals.
11. Differentiate between physical and chemical changes.
12. Which separation technique is used to separate two immiscible liquids?
13. What is chromatography? Write its significance.
Answers
Answered by
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Answer:
1) 300- 273.15= 26.75 degree celcius
Explanation:
1 kelvin is equal to 273.15 celcius
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