M.M: 57 marks Dated: 24/06/2011
Time: 1 hour 30 minutes
Q 1: Fill in the blanks (1 mark per question x 27 = 27 marks)
i. 1 L = ____________ ml.
ii. 1 ml = _________ cm3.
iii. 1 L = _________ dm3.
iv. Early Indian philosophers classified matter in the form of five elements - ________, ___________, _______, _________ and _____________.
v. The S.I unit of mass is ________ and of volume is ______.
vi. The matter is made of _________.
vii. LPG stands for ________________ ______________ _____.
viii. CNG stands for _____________ ___________ _________.
ix. __________ is the ability/property to flow.
x. ____________ __________ is energy that is possessed by a particle due to its motion.
xi. The melting point of ice is ___________ K.
xii. The particles in water at 0C have __________ energy as compared to particles in ice at the same temperature.
xiii. 373 K = ___________ 0C.
xiv. Applying pressure and reducing temperature can _______ gases.
xv. Solid carbon dioxide is also known as _________ ______.
xvi. _____________ and ____________ determine the state of a substance, whether it will be a solid, liquid or gas.
xvii. 1 atmosphere pressure = __________ pa.
xviii. The atmosphere pressure at sea level is _______ atmosphere.
xix. The phenomenon of change of a liquid into vapours at any temperature below its boiling point is called ___________.
xx. ______________ is the amount of water vapour present in the air.
xxi. Evaporation causes ______________ (heating/ cooling/ solidification).
xxii. During evaporation, particles from the surface acquire sufficient energy to overcome the forces of attraction present in the liquid and change its vapour state; Thus evaporation is a _____________ phenomenon.
xxiii. During boiling, particles from the whole/bulk of the liquid changes into vapour state; Thus boiling is a __________ phenomenon.
xxiv. ________________ is the change of gaseous state directly into solid state without going through the liquid state and vice versa.
xxv. The forces of attraction between the particles are _______ in gases.
xxvi. The unit if density is __________.
xxvii. The unit of weight is ___________.
Q 2: What is the physical state of water at 00 C and at 1000 C? Explain in brief. (2 marks)
Q 3: Why ice at 00 C is more effective in cooling than water at the same temperature?
(2 marks)
(2 marks)
Q 4: Give two reasons to justify that a plastic chair at room temperature is a solid. (2 marks)
Q 5: Are rubber band and sponge solids? Explain. (2 marks)
Q 6: What are the three general states of matter? Write three differences between them. (4 marks)
Q 7: How will you change a solid into liquid and then into gas and vice versa? Explain with the help of a labelled diagram. (6 marks)
Q 8: Write the relationship between the rate of evaporation and (2 marks)
- humidity
- wind speed
Q 9: What do you understand by Plasma and BEC? Give two examples of plasma. Who invented BEC? (3 marks)
Q 10: Why do we see water droplets after sometime on the outer surface of a glass containing ice-cold water? (2 marks)
Q 11: Define diffusion and give one real life example to show its application. (2 marks)
Q 12: Draw a diagram and show the intermolecular arrangement of three states of matter. (3 marks)
