Model Question Paper Class 9 Science Term 2

Model Question Paper Class 9 Science 

1.What do you understand by valence electrons.

2.Name the anion and cation that constitute the molecule of calcium oxide.

3.An element 'X' has atomic number 13. Write the formula of its oxide.

4.Write the names of elements present in common salt.

5.If 'K and L' shells of an atom are completely filled with electrons then what will be the total number of elections in an atom.

6.Name two elements that exist as independent atoms.

7.How many atoms are there in 1g of hydrogen.

8.Identify poly atomic ion in MgCO3.

9.State the law of definite proportion.

10.The formula unit mass of Ca3(PO4)2 is ______.

11.What will happen to an element 'X' if its atoms gain three electrons.

12.If the electronic configuration of an atom is 2, 8, 2, calculate the total number of electrons and write the name of the atom.

13. State the Universal Laws of Gravitation

14.Name the particles which determine the mass of an atom.

15.What is the charge on canal rays?

16.What is the difference between Na and Na+ in terms of electron.

17. A ball is thrown vertically upwards with a velocity of 49 m/s. Calculate

        (i) the maximum height to which it rises,

        (ii) the total time it takes to return to the surface of the earth.

18.An atom of an element has 7 electron in its L shell. What is its atomic number and valency.

19.Which of the following are isotopes and which are isobars.

Argon, Calcium, Deuterium, Protium.

20.Which subatomic particle has no charge on it?

21. What do we call the gravitational force between the earth and an object?

22. What: happens to the force between two objects, if

        (i) the mass of one object is doubled?

        (ii) the distance between the objects is doubled and tripled?

        (iii) the masses of both objects are doubled?