- Wooden splints F and G were placed in different zones of a Bunsen burner flame.
The diagram below gives the observations that were made
- Explain the difference between F and G
- Name the type of flame that was used in the above experiment
- The diagrams below represent a list of apparatus which are commonly used in a chemistry laboratory:-
- Give the correct order of the apparatus, using the letters only, to show the correct arrangement that can be used to prepare and investigate the nature of PH of a sample of onion solution
- Name one chemical substance and apparatus that is needed in this experiment
- When the air-hole is fully opened, the bunsen burner produces a non-luminous flame. Explain
- Draw a labelled diagram of a non-luminous flame
- What is a drug?
- Give two drugs that are commonly abused by the youth.
- The diagram below shows three methods for collecting gases in the laboratory
- Name the methods A and B
- From the methods above, identify one that is suitable for collecting sulphur (IV) oxide. Explain
- A mixture of hexane and water was shaken and left to separate as shown in the diagram below:
State the identity of;
(i) P ………………………………..…….. (ii) W ………………………………….….
- The diagrams below are some common laboratory apparatus. Name each apparatus and state its use
Diagram Name Use (½mk ) (½mk) (½mk) (½mk)
- The diagram below shows some parts of a Bunsen burner
Explain how the parts labelled T and U are suited to their functions
- The diagram below shows the appearance of two pieces of paper placed in different parts of a non-luminous flame of a Bunsen burner and removed quickly before they caught fire.
- What do the experiments show about the outer region of the flame?
- From the above experiment, which part of the flame is better to use for heating?Give a reason
- A crystal of copper (II) sulphate was placed in a beaker of water. The beaker was left standing for two days without shaking. State and explain the observations that were made.
- Study the information in the table below and answer questions that follow. (Letters given are not real symbols)
Explain why the ionic radius of :-
Ions Electron arrangement Ionic radius (nm) A+
- B+ is greater than that of A+
- C2+ is smaller than the of A+