KV ONGC Jorhat Holiday Homework – Winter

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