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9th Standard English Medium Science Subject Atomic Structure Book Back 5 Mark Questions with Solution Part - I updated Book back Questions

9th Standard English Medium Science Subject Atomic Structure Book Back 5 Mark Questions with Solution Part - I

9th Standard

    Reg.No. :
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Science

Time : 00:30:00 Hrs
Total Marks : 25
    5 x 5 = 25

  1. What conclusions were made from the observations of Gold foil experiment?

  2. Explain the postulates of Bohr’s atomic model.

  3. State the Gay Lussac’s law of combining volumes, explain with an illustration.

  4. Calculate the volume of oxygen required for the complete combustion of 20 cm3 of methane[CH4(g) +2O2⟶ CO2(g) +2H2O(g)]

  5. Calculate the mass of a proton, given its charge = + 1.60 \(\times\)10−19 C charge / mass = 9.58 \(\times\) 107 C kg-1

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