KV ONGC Jorhat Holiday Homework – Winter Break 2014-15 Class IX (Science) Q 1.Calculate the molecular masses of H2, O2, Cl2, CO2, CH4, C2H6, C2H4, NH3, CH3OH. Q 2. Calculate the Molecular mass of the following:(a) Ethyne C2H6 (b) Sulphate Molecule S8 (c) Nitric Acid HNO3 Q 3. Make the linear diagram of classification of Plants and animals on A4-size paper. Q 4. Write the drawbacks of Rutherford’s model of atom. Q 5. Roll Number 1 to 20 Schematic atomic structure of the first eighteen elements. Roll Number 11 to 20 Rutherford’s model of atom Roll number 20 to 30 Make a chart of Potential Energy Roll Number 31 to 38 Make chart about examples of Kinetic Energy & Potential Energy
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