Q1 of 66 Page 15

The depletion of ozone layer is a cause of concern. Why? (CBSE 2017, 2014)

Both CNG and petroleum are made up of hydrocarbons. Hydrocarbons are organic compounds that are made up only 2 elements, namely carbon and hydrogen. So, Carbon and hydrogen are the two elements present in both CNG and petroleum.

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2

Mention one negative effect of our affluent life style on the environment. 
( CBSE 2013)

 3

In the following food chain, grass provides 4000 j of energy to the grasshopper. How much energy will be available to snakes and frogs?

Grass, Grasshopper, Frogs, Snakes. (CBSE 2013) 

 4

In the following food chain, 100 j of energy is available to the lion. How much energy was available to the producer?

. (CBSE 2010) 

 5

In which form do the plants store the trapped solar energy? ( CBSE 2005)