Everyday Science Examination 1978

Time allowed: 2 hours
Maximum marks: 50                                                           

 PART I

Note: Note: This question paper consists of four parts. 

Answer any live of the following questions.
Each question carries two marks.   10

1.    Name any two chemical fertilizers.
2.    Name two common commercial solvents.
3.    Which ‘fuel is used by Jet aero planes.
4.    how does a barrage differ from a dam.
5.    What is added to commercially used ethyle alcohol  for human consumption.
6.    Name two materials we use which are produced by insects.
7.    Name any two components of Natural Gas.
8.    Which gas is filled in balloons to make it lighter than air.                                                                                                                                  

‘PART II

Define any three of the following. Each question carries 3 marks. 9

1.    Exothermic chemical reaction.
2.    Heavy   water
3.    Hormones.
4.     Alloy.
5.     Unsaturated edible oils.

  PART III

3. where are the deposits of the following minerals found in Pakistan. Each Correct answer will earn one mark. 6

1.     Copper. 2. Coal. 3. Mica. 4. Iron. 5. Petroleum. 6. Precious stones.                                                                 

PART IV

4. Answer any five of the following questions. Each question carries five marks.

1.     What is the ultimate source of energy for all living things? How is this energy trapped and cycled among living things.
2.      What is a reprocessing plant? What is the importance of such a plant for a country deficient in conventional energy sources?
3.   What is a transistor. Briefly describe its impact on our daily life.
4.   How is malaria acquired by man. Which preventive measures should be adopted against malaria at the individual and the community level.
5.   Name the raw materials used in the manufacture of glass. Where re the deposits of these materials found in Pakistan?
6.   Name the genetically transmitted diseases of man. How can the danger. of such diseases be reduced in a community.
7.   Discuss the merits of establishing several smaller industrial units as against few but very large units with particular reference to sugar and cement.
8.   Enumerate various petrochemical products which can be manufactured from natural gas. Is it advisable to burn this gas as a source of heat?