Our universe is crafted of matter. We see many things with different shapes, sizes and textures. Anything that occupies some space and has mass is termed matter. All living and non-living things are matter because they occupy space and have mass. We can further classify matter into three classes. They are solid, liquid and gas.
Download Class 9 Chemistry Worksheet on Chapter 1 Matter in Our Surroundings Set 1 PDF
CBSE Class 9 Chemistry Chapter 1 Matter in Our Surroundings Worksheet – Set 1
Q1. Which of the following does not impact the evaporation rate?
(a) Insoluble heavy impurities
(b) Wind speed
(c ) Surface area
(d) None of the above
Q2. The kinetic energy of the molecule is directly proportional to the
(a) Atmospheric pressure
(b) Temperature
(c ) Both (a) and (b)
(d) None of the above
Q3. The phenomenon in which solid directly converts to the vapour state is known as
(a) Sublimation
(b) Solidification
(c ) Vapourisation
(d) None of the above
Q4. Which of the following is the correct interpretation of dry ice?
(a) It is water in a solid-state
(b) It is water in the vapour state
(c ) It is carbon dioxide in a vapour state
(d) It is carbon dioxide in a solid-state
Q5. What is the boiling point of water at sea level?
(a) 0 K
(b) 100 K
(c ) 373 K
(d) None of the above
Q6. What was the foundation of the elements’ classification in ancient times? Name them.
Q7. Fill in the blanks and give a suitable reason for your answer.
(i) With increase in temperature, particles move ______.
(ii) With the rising temperature, the kinetic energy _______.
Q8. Why can we split a piece of chalk into tiny particles on hammering but not iron?
Q9. Find the density of sand with a mass of 208 g ejecting a volume of 80 mL of water.
Q10. Why is liquid classified as a fluid?
Q11. Solid ice float on water. Justify the statement.
Q12. By which physical phenomenon does the fragrance of a burning stick spread?
Q13. Name the physical phenomenon accountable for parching watery clothes. Why does the spreading of clothes increase the rate of drying?
Q14. Which characteristics of gases help in witnessing LPG gas leakage?
Q15. Convert the following to the Kelvin scale.
(i) 65 ° C
(ii) 300 ° C
Q16. Is dry ice same as the normal ice? If no, then differentiate between dry and ordinary ice.
Q17. Why are fluid particles held less firmly than solid?
Q18. How will you differentiate between a gas and a vapour?
Q19. What are the essential requirements of a substance to be categorised as a matter?
Q20. A student spilt ammonia in one corner of the lab. Soon the laboratory was loaded with the pungent annoying smell. The students instantly unclogged the windows and doors and switched on the exhaust fans. After some time, students got the consolation. What happened? Explain.
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Read Also:
- Matter in Our Surrounding
- Matter in our Surrounding Questions
- States of Matter
- Chemistry Concept Questions and Answers
- Class 9 Chemistry Chapter 1 Matter in Our Surroundings MCQs
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