A carbon compound ‘A’ having melting point 156K and boiling point 351K, with molecular formula C 2 H 6 O is soluble in water in all proportions.
a. Identify ‘A’ and draw its electron dot structure.
b. Give the molecular formulae of any two homologues of ‘A’.
Answer
a. Ethanol; C 2 H 5 OH
Explanation
Ethanol is a colourless liquid having boiling point 351k and melting point 156k
Also it is soluble in water
Its formula is C 2 H 5 OH
Electron Dot Structure of Ethanol is as follows
(b)
(Ethanol is an alcohol
Examples of Alcohols
| Methanol | CH 3 OH |
| Ethanol | C 2 H 5 OH |
| Propanol | C 3 H 7 OH |
| ButanoL | C 4 H 9 OH |
Note
All the above are homologues
Homologues are group of chemical compounds which have similar structure and similar chemical properties and successive compounds differ by CH2
We can say that homologues of ethanol are
| Methanol | CH 3 OH |
| Propanol | C 3 H 7 OH |
