5
What will be the effect caused if all the greenery on earth gets extinct ?
Section-B
Answer the Following questions as asked.
(Each question of 2 marks)
Differentiate between convex lens & concave lens.
(A) Give scientific reasons :
Curd and citrus food should not be stored in Copper or Brass Vassels
(B) What is neutralisation ? explain giving examples.
What do you understand by corrosion ? Write any two methods to reduce
corrosion of iron ?
-6
-8
Write Ohms law and also state its S.l. units.
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