IMPORATNT SCIENCE QUESTION (CLASS-9)

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  1.       Define the following
    (a)   Velocity (b) Force (c) Momentum (d) Displacement (e) Distance
    2.      Prove that V2-u2= 2as by graphical method
    3.      Find the force applied by the bodies of mass 5 kg if the bodies move with rest to 36km/h in 2 second.
    4.      What is Newton third law? Write its application.
    5.      A boy has thrown a ball in upwards direction ball goes 60m high find initial velocity of ball.
    6.      (i) A scooter travelling at 10 m/s speed up to 20 m/s in 4 sec. Find the acceleration of scooter.
    (ii) A bullet hits a Sand box with a velocity of 20 m/s and penetrates it up to a distance of 6 cm. Find             the deceleration of the bullet in the sand?
    7.      (I) A driver accelerates his car first at the rate of 4 m/s2 and then at the rate of 8 m/s2 .Calculate the ration of the forces exerted by the engines?
    (III) A bullet of mass 10 gm is fired with an initial velocity of 20 m/s from a rifle of mass 4 kg. Calculate the initial recoil velocity of the rifle?
    (III) An object of mass 10 g is sliding with a constant velocity of 2 m/ s on a frictionless horizontal table. The force required to keep the object moving with the same velocity is.


                                                          Chemistry
    8.      Define the following
    (i)                 Soild  (ii) Matter (iii) Evaporation (iv) vaporization (v) latent heat of fusion?
    9.      Convert 3000C, 2730C, into Kelvin and 500k, 273K, 300K
    10. Why we are able to sip tea in faster from plate then the cup.
    11. Write the chemical formula of (i) sodium chloride  (ii)  magnesium chloride  (iii) Aluminum oxide (iv) sodium bromide (v) Aluminum chloride
    12. Calculate the number of number of molecule of NaCl in 290g of it. (at. Mass if Na is 23 and Cl is 35)
    13. What will the mass of 12.044 × 1024 molecule of O2.
    14.  How many gram of SiO2 present 0.8 mol of it. ( molecular mass of SiO2 is 60)
                                                   
                                                                      Biology

    15. (a) What is the function of stomata
    (b) What are the specific functions of cardiac muscles?
            16. What is the difference between parenchyma and collenchymas?
            17. Why lysosomes are known as suicidal bag?
            18. Draw a neat labeled diagram of an animal cell or a neurons?
            19.  A group of cells alike in form, function and origin are called
            20. Parenchyma is which type of tissue?
            21. The longest cell in the human body is?
            22. The term cell is given by?
            23. What is cytoplasm?








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