Study Chemistry worksheet on Organic Chemistry for O-Level. Useful for revision, homework, and exam preparation in Zimbabwe.
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This is the ZIMSEC O-Level Chemistry worksheet for Paper 1. It is a free worksheet for revision.
19 Which substance, in exhaust fumes, causes global warming?
A carbon soot
B carbon dioxide
C water vapour
D carbon monoxide
20 What is the use of limestone in the blast furnace?
A to produce slag
B to act as a fuel
C to produce carbon monoxide
D to reduce iron (III) oxide to iron
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21 Which diagram, $\mathbf{A}, \mathbf{B}, \mathbf{C}$, or $\mathbf{D}$, shows the structure of ethane?
A
C
B
D