1. It is bright and non-sooty
2. It is light and non-sooty
3. It is very hot and large
4. It is very hot and non-sooty

 Technicians prefer to use blue flame in welding because 

1. it is bright and non-sooty 
2. it is light and non-sooty.
3.  it is very hot and large.
4. it is very hot and non-sooty.
5.  it is not expensive.

 A non-luminous flame is the most applicable flame for heating purposes because:

1. It is very noisy
2. It has no soot
3. It is very hot
4. It has no colour

The part of Bunsen burner that controls the amount of air coming in is called:

1. Air hole
2.  Barrel
3.  Collar 
4.  Jet

Which is the suitable alternative heat source to be used in absence of Bunsen Burner?

1. Torch and spirit burner
2. Torch and kerosene stove
3. Kerosene stove and spirit burner
4. Firewood and torch.

Why Non – luminous flame is the most applicable flame for heating purposes?

1. It is very nosy
2. It has no soot.
3. It is very hot
4. It has air holes open

How many zones are there in a non-luminous flame?

1. Four zones
2. Two zones
3. Three zones
4. Five zones

How many zones are there in a non-luminous flame?

1. Four zones
2. Two zones
3. Three zones
4. Five zones

Air entering the Bunsen burner barrel can be controlled by

1.  metal ring 
2.  air hole
3.  metal jet 
4. air ring

    The process which produces energy in form of heat and light is called:

1. decomposition 
2. combustion
3.  distillation 
4.  sublimation

The part of Bunsen burner that controls the amount of air coming in is called:

1. Air hole
2.  Barrel
3.  Collar 
4.  Jet

Which among the following sets of materials can cause fire outbreak?

1. Oxygen, carbon dioxide and fuel
2. Oxygen, heat and fuel 
3. Oxygen, heat and carbon dioxide
4. Oxygen, foam and fuel
5. Oxygen, heat and foam

    In the Bunsen burner a sooty flame is most likely to be formed when the:

1. Air holes are fully closed 
2. Air holes are opened
3. Flame is noisy
4. Flame is smaller and hotter

 The choice of the source of heat depends on the:

1. Colour of the flame
2. Quantity of heat produced
3. Substance to be burned or boiled
4. Type and shape of flame

      A non-luminous flame is obtained if the hole is:

1. fully opened 
2. partially opened 
3.  closed 
4.  half opened

What are the five steps used in lighting a Bunsen burner?

Define the following terms as applied in Chemistry:

(i)Flame

(ii)Bunsen burner

(iii)Laboratory

(b)      List four properties of each of the following:

(i)       A luminous flame

(ii)     A non-luminous flame

4. (a) Draw a well labeled diagram of a non­luminous Bunsen burner flame (3 marks)

(b) By excluding a Bunsen burner, mention other three sources of heat that can be used in the laboratory.

(c) Why is a Bunsen burner the best heat source in the laboratory? Give three (3) reasons.