Science Question of class 9
Sub-Science                                    Maximum marks: 75
Class-Nine                                         Minimum marks: 30
                                Time- 2:15 hrs.           
All the questions are compulsory to attempt.
                                       PHYSICS
1. A. What is the relation among acceleration produced, force applied and mass of a moving body? Write the two differences between distance and displacement. (1+2)
    B. A force acts for 1 second on a body of mass 24 kg at rest and produces a velocity of 4 ms-1. Find the magnitude of force. (1+1)
2. A. Wheel and axle is called a continuous lever, why? State the law of moment. (1.5+1)
   B. A tall tree has more probability to break down as compared to a short tree, why? Write a formula to calculate velocity ratio of a lever. (1.5+1)
3. A. Write the two differences between kinetic energy and potential energy. What types of energy are stored in stretched catapult and kerosene?   (2+1)
    B. Write the two differences between audible-sound and infra sound. (2)
4. A. Draw a well labelled diagram of refraction of light through glass. What is the main cause of refraction of light? (2+1)
   B. The angle of incidence on air-glass slab surface is 300. Find the angle of refraction inside the glass if refractive index of glass is 1.5. (2)
5. A. If a cell of e.m.f. 12 V is connected to a resistor of 20 Ω, calculate the value of current. Define conductivity. (2+1)
    B. A freely suspended magnet or needle compass always stays in north-south direction, why?  (2)                
                               CHEMISTRY
6. A. Define valency and valence electron. Name the three types of covalent bond.  (2+1)
     B. Write the two information obtained from the balanced chemical equation. (2)
7. A. Define solubility curve. The solubility of sodium chloride at 250 C is 500. What amount of water is needed to prepare a saturated solution for 2 kg of salt?  (1+2)
    B. Draw a well labeled diagram for the laboratory preparation of hydrogen gas with a necessary chemical reaction. (2)
8. A. Define NPK fertilizer. Write the two advantages of organic fertilizer.  (1+2)
   B. Write an importance of zinc in human body. What do you mean by allotropes of carbon? (1+1)
                                 BIOLOGY   
9. A. Write the two characteristics of fungi. Define hermaphrodites.  (2+1)
   B. Name the four types of virus on the basis of host with one example of each.  (2)
10. A. Name the types of ribs with their number. Write a main function of kidney. Name the enzymes produced inside a stomach.  (1+1+1)
   B. Define organic evolution. Write a difference between analogous and homologous organs. (1+1)
11. A. Write the three fundamental views given by Lamarck’s theory. Define mutation and fossils. (1+1+1)
    B. Define meristematic tissue. Name the two complex conducting tissues present in the plants.    (1+1)
                          ASTRO+GEO
12. A. Draw a well labeled diagram of solar eclipse. Define eclipse.   (2+1)
    B. Write the two ways to conserve soil.  (2)
                                       ENVIRONMENT
13. A. Define food chain and food web. What do you mean by saprophyte? (2+1)
     B. Write the examples of producers and consumers of water ecosystem. Define land ecosystem.  (1+1)
14. A. Write the two importance of artificial green house. What is ozone layer?   (2+1)
     B. Write the two effects of ozone layer depletion.  (2)
15. A. Define natural hazards. Give two examples of anthropogenic disasters.  (1+1)
     B. Write the two effects of volcanoes. What is lava? (3)
                                           THE END
 Numericals:

      (a) Write difference between vector and scalar? A car started from rest with velocity 10 km/hr find the time and acceleration to covered 50km distance? Draw the velocity time graph of constant acceleration, and describe.   Write principle of moment?                (1+2+1.5+1=5.5)
      (b) Define one joule work? Write any two differences between Kinetic energy and potential energy. Why M.A. is always less than V.R of a machine? A car of 800 kg mass travelling with a velocity of 40m/s stops at a       distance 60m. Calculate the work done on applying brakes and power after 10 second. Write the SI unit of work, magnetic field and power. (1+1+2+2+1=6.5)
2.   (a)  Write down the molecular structure of ammonia. Write down the sub-shell electronic configuration of Al, K and S. Write down the any two difference between saturated and supersaturated solution. The solubility of sodium chloride at 250 C is 500. What amount of water is needed to prepare a saturated solution for 2 kg of salt?   (1+1.5+1+1=4.5)
      (b)  Write the two characteristics of fungi. Define hermaphrodites. Write the two effects of ozone layer depletion.   (1+1.5+1=3.5

Another Set



Sub-Science                                                         F.M: 100

Class-Nine                                                              P.M: 40
                                Time- 3:00 hrs.           
All the questions are compulsory.
                                       PHYSICS
1. a. What is Derived unit? Write the units of Moment, Wavelength, emf and Luminous intensity.  (1+2=3)
    b. State derive Newton's second of motion. Define inertial force. Differentiate between distance and displacement (4.5)
2. a. Draw a velocity-time graph of uniform velocity. While catching a ball a cricket player moves his hand backwards, Why? The mass of a body is 10kg calculate the amount of work done by the body in climbing 8.5m height of a buildings.   (g=10m/s2)     (1+1.5+1=3.5)
   b. Define retardation. When does a moving body have zero acceleration? Write the SI unit of retardation. Why M.A. is always greater than V.R of a machine? (1+1+0.5+2=4.5)
3. a. The efficiency of a simple machine is 90%. What does it mean? A lever of 8m is balanced about 150cm from one end. A lode of 600N is placed at a point 1m on the short arm. Where is the lode of 150N to be placed on the long arm? (1+2=3)
    b. Prove  Symbol have usual meaning. Define Principle of conservation of energy. An electric bulb consumes 4000 joules of energy in two minute calculate its power. (2+1.5+1.5=5)
4. a. Write two differences between transverse and longitudinal wave. Define electromagnetic wave with two examples. (2+2=4)
   b. Define total internal reflection write its condition required. Write two difference between refraction and reflection of light. (1+1.5+1.5=4)
5. a. State and prove ohm's law. Write the two factors that affect resistance of a wire. Define Conductivity. Write down any two difference between emf and pd. (1.5+1+1+1=4.5)
    b. Write the two properties of magnetic lines of force. Define Terrestrial magnetism. Define angle of Dip, also write value of it at South Pole. (2+1+1=4)                
                               CHEMISTRY
6. a. Define electropositive radical. Draw a molecular structure of NH3.  (1+2=3)
     b. Write a molecular formula of the following: urea, limestone, cuprous chloride and ferric sulphate. (2)
7. a. Define rusting of iron. What is hydrogenation? 24 gm of water saturated with silver nitrate at 600C is cooled to 150C. Calculate the wt. of the salt thrown out. Solubility at 600C and 150C are 525 and 196 respectively.   (1+1+2=4)
    b. Which gas is produced when Zn reacts with dil.   Draw a well labeled diagram of laboratory preparation of it. Write balance chemical reaction when it reacts with N2 gas. (1+2.5+1=4.5)
8. a. Nitrogen gas is called an inactive gas, why? What happens when hydrogen reacts with chlorine? Show with balanced chemical reaction.  (1+2=3)
   b. Write the electronic configuration of sodium and chlorine on the basis of subshells (s, p, d, f). Write the balance chemical reaction when carbohydrates burn with oxygen gas. (1+1+1.5=3.5)
                                 BIOLOGY   
9. A. Classify scorpion with its one character. Write a adaptational character of desert animals. (2+1)
   B. Define binomial system of nomenclature. What are mesophytes?  (2)
10. A. Frogs have triangular head and webbed legs, why? Give two examples of aerial animals. (1.5+1.5)
   B. Write two adaptational characters of fossorial animals. (1+1)
11. A. Bryophytes are called amphibian plants, why? Define hermaphrodites. (1+1)
    B. Write two differences between plant cell and animal cell. What is cell wall made up of?  (2+1)
                          ASTRO+GEO
12. a. Convert 1pc into meter. Define sidereal month and synodic month   (1+1+1=3)
      b. Why does the moon revolve around the earth? Write a cause of days and night.  (1+1=2)
13. a. Name any two gases that causes global warming. Define green-house effect. What is ozone layer?   (1+1+1=3)
      b. The earth is a natural green house, why?  (2)
                                           THE END