Chemistry Questions and Answers - Form 1 Mid Term 1 Exams 2022

Questions

1. Define the following terms:
   1. Chemistry (2mks)
   2. Matter (1mk)
   3. Drug abuse (1mk)
2. Name four career opportunities open to a chemist. (4mks)
3. Name three frequently abused drugs. (3mks)
4. Explain why most laboratory apparatus are made of glass. (2mks)
5. Name three apparatus used for measuring volumes. (3mks)
6. Name the function of the following apparatus. (2mks)
   1. Conical flask
   2. Boiling tube
7. Draw a well labeled diagram of a Bunsen burner. (4mks)
8. Give four differences between a luminous and non-luminous flame. (4mks)
   

   Luminous flame	Non-luminous flame

9. Name two safety rules in the laboratory. (2mks)
10. Define:
    1. Sublimation (1mk)
    2. Chromatography (1mk)

Marking Scheme

1. Define the following terms:
   1. Chemistry (2mks)
      • Chemistry is the study of the structure properties and composition of mater and the changes that matter undergoes.
        
        
   2. Matter (1mk)
      • Is anything that has mass and occupies space.
        
        
   3. Drug abuse (1mk)
      • Is the use of a drug for a purpose other than that for which it is meant.
        
        
2. Name four career opportunities open to a chemist. (4mks)
   • Manufacture of drugs to fight diseases.
   • Food production to fight hunger
   • Manufacture of cheaper alternative fabrics such as nylon, polyester and tetron.
   • Manufacture of detergent
   • Manufacture of plastics for roofing, packing and domestic use.
   • Production of fuels for transport and domestic use.
     
     
3. Name three frequently abused drugs. (3mks)
   • Tobacco
   • Alcohol
   • Bhang
   • Miraa (khat)
     
     
4. Explain why most laboratory apparatus are made of glass. (2mks)
   • They do not react with most of the reagents
   • They allow one to see through while observing the reactions taking place or to determine the level of the liquids.
     
     
5. Name three apparatus used for measuring volumes. (3mks)
   • Beaker
   • Conical flask
   • Measuring cylinder
6. Name the function of the following apparatus. (2mks)
   1. Conical flask
      • Used for general laboratory experiments and for measuring approximate volumes of liquids.
        
        
   2. Boiling tube
      • Used when heating substances
        
        
7. Draw a well labeled diagram of a Bunsen burner. (4mks)
   
8. Give four differences between a luminous and non-luminous flame. (4mks)
   

   Luminous flame	Non-luminous flame
   Has four zones	Has three zones
   The flame is not noisy	The flame is noisy
   The flame is yellow	The flame is blue
   The flame is large and waxy	The flame is small and straight
   The flame has four zones	The flame has three zone
   The flame produce soot	The flame does not produce soot

9. Name two safety rules in the laboratory. (2mks)
   • Never taste or eat anything in the laboratory to avoid poisoning.
   • Label all the chemicals you are using to avoid confusion.
     
     
10. Define:
    1. Sublimation (1mk)
       • The process where a substance changes from solid to vapour directly or vapour to solid without forming.
    2. Chromatography (1mk)
       • This is the process/method which is used to separate the components of a mixture/ coloured components.