What is meant by functional group in carbon compounds? Write in tabular form the structural formula and the functional group present in the following compounds:
(a) Ethanol
(b) Ethanoic acid
Functional Group: A functional group in carbon compounds is a group of atoms that is responsible for the characteristic reactions of the compound. It defines the reactivity and properties of the compound.
Table of Structural Formula and Functional Groups:
Arrange the following set of carbocations in order of decreasing stability.

Choose the correct answer from the options given below:
| Class | 0 – 15 | 15 – 30 | 30 – 45 | 45 – 60 | 60 – 75 | 75 – 90 |
|---|---|---|---|---|---|---|
| Frequency | 11 | 8 | 15 | 7 | 10 | 9 |
Leaves of the sensitive plant move very quickly in response to ‘touch’. How is this stimulus of touch communicated and explain how the movement takes place?
Read the following sources of loan carefully and choose the correct option related to formal sources of credit:
(i) Commercial Bank
(ii) Landlords
(iii) Government
(iv) Money Lende