PAST BOARDS 2014

Question 1

Formula of Red Lead

Answer 1

Pb3O4

Question 2

Can oxygen be synthesized from nitrogen?

Answer 2

Impossible unless i.exposed in a very hot temp. like stars and sun

Question 3

Author of Octet Rule

Answer 3

Gilbert Lewis

Question 4

How does alpha, beta, and gamma particle affect the mass number of an atom?

Answer 4

4,0,0

Question 5

Iodine vapor forms iodine crystals when it touches a cold surface. What is the reverse of the process being describe?

Answer 5

Sublimation

Question 6

Given Dodecane
I. Is it soluble in water?
II. Is it soluble in hexane?
III. Is it combustible?
IV. Is it solid, liquid or gas at room temp. and atmospheric conditions?
V. Is it denser than water?

Answer 6

I. No
II. Yes
III. Yes
IV. Liquid
V. Less Dense