9th class guess paper of chemistry objective

Zahoor ul islam boys high school gujar khan.

Class. 9^th.    Subject.    Chemistry.    Year.    2019.

         Name _________________________________________            Roll no.__________

QNo.1. Choose the correct option?

1.No of protons in oxygen atom is

a) 8.                b) 6.               c) 9.                  d) 5

2. Charge on an atom is

a) positive.              B) negative.            C) Neutral.           D) -2

3. Mass no of Hydrogen atom is.

a) zero.                  B) -1.              C) 2.              D) 1

4. Atomic radius of carbon atom is pm is

a) 66.                B) 77.                   C) 87.                   D) 97

5. Atomic no of caesium is.

a) 55.            B) 65.               C) 75.               D) 85

6. Chlorine atom has valence electrons

a) 5.                B) 7.                    C) 6.                  D) 8

7. Gain of electrons is called.

a) oxidation.        B) reduction.      C) redox.      D) None

8. Example of non electrolyte is

a) CH3COOH.                B) sugar.                C) NaOH.                 D) NaCl

9. Anode of dawn's cell is made up of

a) Iron.           B) steel                C)  graphite.       D) zinc

10. Gram atomic mass of hydrogen is

a) 1.08 g           b)  1.008 amu.          C) 2.016 g.          D)  1.008 g

11. When U-235 breaks up it produces.

a) proton               b) electron           c) neutron             d) none

12. Which element occurs in gaseous state.

a) mercury.               B) diamond.           C) gold.          D) brass