a) In a food chain, 10,000 joules of energy is available to the producer. How much energy will be available to the secondary consumer to transfer it to the tertiary consumer? [All India ] will be available to the secondary consumer to transfer it to the tertiary consumer?

b) What happens when higher energy ultraviolet radiations act on the oxygen at the higher level of the atmosphere? 

c) Select two non-biodegradable substances from the following waste generated in a kitchen: spoilt food, paper bags, milk bags, vegetable peels, tin cans, used tea leaves. [Delhi] kitchen: spoilt food, paper bags, milk bags, vegetable peels, tin cans, used tea leaves.

d) Name two decomposers operating in our ecosystem

e) Which class of chemicals is linked to the decrease in the amount of ozone in the upper atmosphere of the earth? [Delhi] atmosphere of the earth?