Question

1. Deficiency of iodine in water can affect the population of frogs. Validate the statement.
2. Mention the tips we must follow while driving vehicles to save petrol/diesel/natural gas.
3. Give reasons:
a) CNG is considered a better fuel than petrol
b) Coal is an exhaustible natural resource.

Answer 1

1.As we know that for the reproduction of frogs the process of metamorphosis is important. In the process of metamorphosis iodine is very important. Without iodine no reproduction is occur. Hence their population will decrease.

2.a) Off the engines of the car where you want to stop.
b) Drive the car at a constant speed.
c) Proper maintenance of vehicle is required.


3.a) CNG is considered a better fuel than petrol because it burns easily and produce less poisonous gases than petrol.
b) Coal is an exhaustible natural resources because it present in limited quantity. It can finished by human activities.



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