How well do you remember your Chemistry?

Happy Weekend guys..
This morning, As I was looking for a particular O'level text book in my library, there I stumbled on one of my old Chemistry jotter i used in preparing for Unified Tertiary Matriculation Examination (UTME) then..
So I decide to share some of the jotts with you on here

Here we go....

How well do you remember these?

1, Why are branch chains hydrocarbon preferred to straight chains hydrocarbon?

2, Brass is made up of ____ & ____

3, The oxidation state of carbon in most organic compound is?

4, Another name for Mercury is?

5, Coal is a mixture of ____, _____, & _____

6, A burning candle produces ____ & _____

7, Calcium (metal) burns with a _____ flame?

8, Bronze is made up of ____ & ____

9, Steel is made up of ____ & ____

10, When the temperature of a liquid increases, the surface tension _________

Let me top here, how well do you remember them?
Find the answers below:

1, They are not easily broken down

2, Cu & Zn

3, +4

4, Quick Silver

5, Ch4, Co2 & H2

6, H2O & CH2

7, brick red

8, Cu & Sn

9, Fe & C

10, decreases