This document contains 20 physics questions, 10 chemistry questions, and 20 biology questions related to various topics in the respective sciences. The physics questions cover concepts like acceleration, velocity, displacement, average speed, and motion graphs. The chemistry questions cover states of matter, phase changes, boiling point, diffusion, and characteristics of solids, liquids, and gases. The biology questions cover cell organelles, their structure and functions, transport mechanisms, consequences of osmosis, and distinguishing features of plant and animal cells.

1. Subject: Science
Physics Assignment
Q1. An object is moving up an inclined plan. Its velocity changes from 15m/s to 10m/s in two
seconds. What is its acceleration?
Q2. A body covered a distance of x metre along a semicircular path. Calculate the magnitude of
displacement of the body, and the ratio of distance to displacement?
Q3. A particle moving with an initial velocity of 5m/s is subjected to a uniform acceleration of -
2.5m/s2. Find the displacement in the next 4 sec.
Q4. A car covers 30km at a uniform speed of 30km/hr. what should be its speed for the next
90km if the average speed for the entire journey is 60km/h?
Q5. A person goes to market, makes purchases and comes back at a constant slower speed. Draw
displacement -time and velocity time graphs of the person?
Q6. A particle was at rest from 9 a.m. It moved at a uniform speed 10km/hr from 9.30 a.m. to10
a.m. Find the average speed between (a) 9.00 a.m. and 10.00 a.m., (b) 9.15 a.m. and 10.00 a.m.
Q7. An insect moves along a circular path of radius 10 cm with constant speed. If it takes 1 min.
to move from a point on the path to the diametrically opposite point, find (a) the distance
covered, (b) The speed, (c) the displacement, (d) average velocity.
Q8. A particle with a velocity of 2m/s at t=0 moves along a straight line with a constant
acceleration of 0.2m/s2. Find the displacement of the particle in 10s?
Q9. A particle is pushed along a horizontal surface in such a way that it starts with a velocity of
12m/s. Its velocity decreases at a uniform rate of 0.5m/s2. (a) Find the time it will take to come
to rest. (b) Find the distance covered by it before coming to rest?
Q10. A train accelerated from 20km/hr to 80km/hr in 4 minutes. How much distance does it
cover in this period? Assume that the tracks are straight?
Q11. Cars moving along a straight line at a speed of 54km/hr stop in 5s after the brakes are

2. applied. (a) Find the acceleration, assuming it to be constant. (b) Plot the graph of speed versus
time. (c) Using the graph. Find the distance covered by the car after the brakes are applied?
Q12. A car moves 100m due east and then 25m due west. (a) What is the distance covered by the
car? (b) What is its displacement? Q13. A body starts from rest and moves with a uniform acceleration
of 5m/s2 for 5s and then it
moves with a constant velocity for 4s. Later it slows down and comes to rest in 5s. Draw the
velocity graph for the motion of the body and answer the following questions:
a. What is the maximum velocity attended by the body?
b. What is the distance travelled during this period of acceleration?
c. What is distance travelled when the body was moving with constant velocity?
d. What is the retardation of the body while slowing down?
e. What is the distance travelled by retarding?
f. What is the total distance travelled?
Q14. An athlete moves 150m in 2minutes and next 50m in 20s on the same straight path. What is
his average speed and average velocity?
Q15. A vehicle moves at a speed of 40 km/h, It is stopped by applying brakes which produces a
uniform acceleration of -0.6m/s2 . How much distance will the vehicle move before coming to
stop?
Q16. Two stones are thrown vertically upwards simultaneously with their initial velocities u1
and u2 respectively. Prove that the heights reached by them would be in the ratio of u12:u22
(Assume upward acceleration is –g and downward acceleration to be +g).
Q17. Why rest and motion are considered relative to each other?
Q18. Differentiate between scalar and vector quantities.
Q19. If the body comes to rest, what can you say about its acceleration?
Q20. Define uniform velocity and uniform acceleration.
CHEMISTRY ASSIGNMENT

3. 1. Define the following
(i) Latent heat of fusion
(ii) Sublimation
(iii) Diffusion
(iv) Evaporation
(v) Boiling point
2. State the method by which gases can be liquefied easily.3. Give two points of difference between
(i) Evaporation & boiling
(ii) Liquid state & gaseous state
4. In which state of matter
(i) Intermolecular forces are maximum
(ii) Diffusion is least
(iii) Shows fluidity
5. When a crystal of copper sulphate is placed at the bottom of the beaker containing water,
the colour of water slowly becomes blue. Why ?
6. The boiling point of ethyl alcohol is 78C. What is the corresponding temperature on
Kelvin scale?
7. What are the factors which are responsible for bringing a change in physical state of a
substance ?
8. Draw a neat & labelled diagram to show
(i) Interconversion of states of matter
(ii) Demonstration of sublimation
9. When sugar is dissolved in water, there is hardly an increase in volume. Which
characteristic of matter is illustrated by this observation?
10. Give reasons:

4. (i) Solids are normally not compressible but a sponge is readily compressed.
(ii) Gases are highly compressible.
(iii) We sweat more on a humid day.
(iv) A piece of chalk can be broken into small particles on hammering but it is not
possible to do so in case of piece of iron.
(v) Evaporation is a surface phenomenon.
(vi) Ice floats on water
(vii) There is no further rise in temperature when we heat a liquid at its boiling point.
(viii) Steam causes more severe burns as compared to boiling water.
(ix) The spaces between the constituent particles is maximum in the gaseous state.
(x) Water kept in earthen pot becomes cold during summer.
BIOLOGY
CHAPTER – THE FUNDAMENTAL UNIT OF LIFE
Q1. Which cell organelle bear cristae?
Q2. What are Golgi bodies in plant cells called as?
Q3. Expand DNA, RNA, and ATP.
Q4. What is the study of nucleus known as?Q5. Why do plant cell possess large sized vacuole?
Q6. Explain the phenomenon of exocytosis and endocytosis.
Q7.In what ways chloroplast and mitochondria similar?
Q8. We eat food composed of all the nutrients like carbohydrate, protein, fat, vitamins, water,
and minerals. After digestion, these are absorbed in the form of glucose, amino acids, fatty acids
etc. What mechanisms are involved in absorption of digested food and water?
Q9. What are the consequences of the following conditions?
a) A cell containing high water concentration than the surrounding medium.
b) A cell containing low water concentration than the surrounding medium

5. c) A cell containing equal water concentration to its surrounding medium.
Q10. What will happen if nucleus is removed from the cell?
Q11. Name the structure which is associated with a) one unit membrane
b) Two unit membrane c) without membrane.
Q12. a) Distinguish between nucleolus and nucleus.
b) What is tonoplast?
Q13. What happens to the plant cell when kept in hypertonic solution?
Q14. Where the lipids and proteins constituting the membrane gets
Synthesized?
Q15. What would happen if the plasma membrane ruptures or breaks down?
Q16. Why does the skin of your finger shrink when you wash clothes for a longer
time?
Q17. Which organelle plays a crucial role in detoxifying many poison and drug in
a cell?
Q18. a) What is membrane biogenesis?
b) Why is the plasma membrane called a selectively permeable membrane?
Q19. Distinguish between chloroplast and leucoplast with respect to their
Pigments and function.Q20. Label the given animal cell.
Q20 b) Label the given plant cellC