Question 1
a) Define a drug?
b) Differentiate between drug dependence and drug abuse.
Answer
a) Any Chemical substance that alters the functioning in body.
b) Drug abuse is the use of drugs unnecessary or for leisure while drug dependency is when one cannot do without drugs.
b) Drug abuse is the use of drugs unnecessary or for leisure while drug dependency is when one cannot do without drugs.
Question 2
State the uses of the following apparatus.
a) Desiccator
b) Dropping funnel
c) Crucible
Answer
a) Desiccator – absorbs water from a substance
b) Dropping funnel - dropping liquid chemicals into flask
c) Crucible - hold solid chemicals that are being heated strongly
b) Dropping funnel - dropping liquid chemicals into flask
c) Crucible - hold solid chemicals that are being heated strongly
Question 3
A wooden splint was slipped through the middle of region of a particular flame in the laboratory and results were as shown below
a) Name the type of flame that produced the results.
b) Explain why the splint was burnt as shown above
c) State two characteristics of the flame
Answer
a) Luminous flames.
b) The burnt parts shows where complete combustion took place.
c) – Wavy
- Sooty
b) The burnt parts shows where complete combustion took place.
c) – Wavy
- Sooty
Question 4
a) The apparatus below is used in chemistry laboratory
b) Explain how the shape is suited for its function.
Answer
a) Clonical flask
b) The narrow neck avoids spillage
b) The narrow neck avoids spillage
Question 5
The following is a diagram of a Bunsen burner.
a) What is the purpose of:-
A
B
b) Show on the diagram the hottest part of the flame produced.
Answer
a)
A - Chimney
B - Collar
B - Collar