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Chemistry
All India Exam - 2015
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Q1 of 56 Page 1

Write the number of covalent bonds in the molecule of butane, C4H10

The structure of Butane C4H10 is as follows:


No. of covalent bonds in butane are 13.


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18

What is an ecosystem? List its two main components. We do not clean natural ponds or lakes but an aquarium needs to be cleaned regularly. Why is it so? Explain.

19

What are fossils? How are they formed? Described in brief two methods of determining the age of fossils. State any one role of fossils in the study of the process of evolution.

2

"Name two simple organisms having the ability of regeneration.

3

Which of the following are always at the second trophic level of food chains?

Carnivores, Autotrophs, Herbivores

Questions · 56
All India Exam - 2015
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