3g7 matha

iv) type of bond that is formed between A and B.
(d) Write equations in words and symbols for the following reactions.
(i) Dinitrogen oxide reacts with carbon.
(ii) Concentrated nitric acid reacts with magnesium.

(g) (i) State ‘Le Chatelier’s principle’.
(ii) Using Le Chatelier’s principle, predict the effect of increasing pressure on the following equilibrium.
N2(g) + 3H2(g) ⇋ 2NH3(g)
(h) (i) Describe the elements required by plants.
(ii) Give the monomer structure and uses of PS.

1. Answer any FOUR questions. (32 marks)
   (a) (i) Define buffer solution.
   Explain how vegetative propagation takes place in strawberry and potato.
   (f) Clarify what you understand of diploid and haploid condition in cell division.
   (OR)
   State what factors cause main effects on pollution of inland water.
2. Answer ANY FOUR questions. (16 marks)
   (a) Differentiate endospermic and non-endospermic seeds.
   (b) Name the parts of the intestine and state the nature of the part increases the absorptive surface of the
   intestine as found in the rabbit.