Std. 9th GSEB Science – Ch.

1, 2 and 7 Test: 40 marks

Name- Dt. ________________

[A] MCQ: [06 X ½ m = 03 marks]

1) What is the boiling point of acetone?
(a) 196°C (b) 186°C (c) 78.3°C (d) 183°C
2) Who was the first scientist to use the term ‘element’ in 1661?
(a) Robert Boyle (b) Charles (c) Antonnie Lorent (d) None of them
3) What is dry ice?
(a) Solid carbon dioxide (b) Nitrogen oxide (c) Carbon mono oxide (d) None of them
4) Which condition out of the following will increase the evaporation of water?
(a) Increase in temperature of the water (b) Decrease in temperature of the water
(c) Less exposed surface area of water (d) Adding common salt to the water
5) The rate of change of velocity per second is known as:
(a) acceleration (b) speed (c) average velocity (d) linear motion
6) A particle is moving in a circular path of radius r. The displacement after half a circle would be:
(a) zero (b) πr (c) 2r (d) 2πr

[B] Fill in the blanks: [04 X ½ m = 02 marks]

7) To separate a mixture of two or more miscible liquids for which the difference in boiling points is
less than ________ fractional distillation method is used. (100K, 50K, 25K)
8) Early Indian philosophers classified matter into _______ basic forms or elements. (seven, five, nine)
9) _______ and ______ laid down the scientific foundation of concept of motion. (Newton, Louis Pasture,
Louis Brown, Galileo)
10)Negative acceleration is known as __________ (Inertia, retardation, velocity)

[C] State whether the following statements are true or false: [04 X ½ m = 02 marks]
11)The characteristic features of a particular substance obtained from different sources will be different.
12)Gases are highly compressible as compared to solids and liquids.
13)Motion is a change of position, it can be described in terms of the distance moved or the displacement.
14)Automobiles are fitted with a device that shows the distance travelled. Such a device is known as
speedometer.

[D] Match column A with B: [04 X ½ m = 02 marks]

A B
1. Aerosol (i) Shaving cream
2. Foam (ii) Coloured gemstone, milky glass
3. Emulsion (iii) Milk of magnesia, mud
4. Gel (iv) Milk, face cream
(v) Fog, clouds, mist
(vi) Jelly, cheese, butter

[E] Answer the following: [03 X 1m = 03 marks]

15)How would you separate common salt and iodine from their mixture?
16)Define: Brownian motion.
17)Give one example of simple harmonic motion.
 [F] Answer the following: (Do any four) [04 X 2m = 08 marks]
18)Distinguish between scalar and vector quantities with examples.
19)A ball is gently dropped from a height of 20 m. If its velocity increases uniformly at the rate of 10 m s-2,
with what velocity will it strike the ground? After what time will it strike the ground?
20)Distinguish between homogenous and heterogeneous mixtures.
21)To make a saturated solution, 36 g of sodium chloride is dissolved in 100 g of water at 293 K. Find its
concentration at this temperature.
22)(i) Convert the following temperatures to the Celsius scale. (a) 293 K (b) 470 K.
(ii) Convert the following temperatures to the Kelvin scale. (a) 25°C (b) 373°C.
23)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.

[G] Answer the following: (Do any four) [04 X 3m = 12 marks]

24)Give differences between mixtures and compounds. (minimum three points).
25)Classify the following as chemical or physical changes:
cutting of trees, melting of butter in a pan, . rusting of almirah,
boiling of water to form steam, dissolving common salt in water,
passing of electric current, through water and the water breaking down into hydrogen
and oxygen gases,
26)An athlete completes one round of a circular track of diameter 200 m in 40 s. What will be the distance
covered and the displacement at the end of 2 minutes 20 s?
27)Fig 8.11 shows the distance-time graph of three objects A,B and C. Study the graph and answer the
following questions:
(a) Which of the three is travelling the fastest?
(b) Are all three ever at the same point on the road?
(c) How far has C travelled when B passes A?
(d) How far has B travelled by the time it passes C?

28)Define
(i) The latent heat of fusion.
(ii) The latent heat of vaporisation.
(iii) Evaporation
29)Name A, B, C, D, E and F in the following
diagram showing change in its state

[H] Answer the following: (Do any two) [02 X 4m = 08 marks]

30)Derive the second equation of motion graphically.
31)Tabulate the differences (minimum six) in the characteristics of states of matter.
32)Which separation techniques will you apply for the separation of the following?
(a) Sodium chloride from its solution in water.
(b) Ammonium chloride from a mixture containing sodium chloride and ammonium chloride.
(c) Small pieces of metal in the engine oil of a car.
(d) Different pigments from an extract of flower petals.
(e) Butter from curd. (h) Oil from water.
(f) Tea leaves from tea. (i) Iron pins from sand.
(g) Wheat grains from husk. (j) Fine mud particles suspended in water.