5 Chapter Test

Omtex – classes “THE HOME OF TEXT”

NAME OF THE STUDENT ROLL NO SUBJECT

TOTAL MARKS 60 TIME 1HR 30MIN. SCIENCE – I

I. Give scientific reasons. Any 10 (20 marks) 1. In cold countries, pipelines carrying water burst. 2. Inert gas elements do not take part in chemical reactions. 3. While using X – rays for curing skin diseases long exposure to X- rays should be avoided. 4. Rocket must have a very high driving power. 5. Sound cannot be heard on the moon. 6. X – rays are used for the detection of fracture of bones. 7. Cadmium rods are used to control chain reactions. 8. All the elements belonging to B group (IB to VIIIB ) are known as transition elements. 9. A road going up a steep hill is always winding and has a small slope. 10. Gaseous fuels have many advantages over solid and liquid fuels. 11. Discuss the importance of anomalous behaviour of water in nature. 12. What are radioactive substance? Name the scientist who first discovered the phenomenon of radioactivity. II. Answer the following questions. Any 10 ( 20 Marks) 1. Give any four uses of X – rays 2. Give two characters of an ideal fuel. 3. Define Kinetic energy and Potential energy. 4. Write short notes on Transition elements. 5. Describe Determiner’s Law of Triads. Give any two example to support the law of triads. 6. Write the units of heat in M.K.S and C.G.S system. Define them] 7. State law of conservation of energy. Give one example 8. What are the main advantages of solar energy. 9. State four properties of β – rays. 10. State Mendeleeff’s Periodic Law. 11. Define the following: a. One calorie b. Fossil Fuel. III. Explain the following with the help of the neat labeled diagram. All (16 marks) 1. Bio – gas Plant. 2. Solar Water heater 3. Electric Bell 4. α, β & γ radiations when kept in Dark room. IV. Distinguish between. Any 2 ( 4 marks ) 1. Potential energy and Kinetic energy 2. α – particles and β – particles 3. β – particles and γ – particles

1 OMTEX – CLASSES “The home of text”

OMTEX – CLASSES “The home of text”