Question

write thename and formula of the second member of the carbon compounds having functional group -OH

Answer 1

Ethyl alcohol or C2H5OH..

Answer 2

The name and formula of the second member of the carbon compounds having functional group -OH is Ethanol ($C_2H_5OH$)

Explanation:

• The presence of functional group "-OH" in a carbon compound indicates it is an alcohol.
• The general formula of alcohol is $C_nH_{2n+1}OH$.
• When this formula is solved with considering value of 'n' as 1  and 2 it gives the first and second member of the family.

For the first member of the series (n = 1)

$C_nH_{2n+1}OH$ = $C_1H_{2(1)+1}OH$ = $C_1H_{2+1}OH$ = $C_1H_{3}OH$

∴ The formula of first member is $CH_3OH$ which is called as methanol.

For the second member of the series (n = 2)

$C_nH_{2n+1}OH$ = $C_2H_{2(2)+1}OH$ = $C_2H_{4+1}OH$ = $C_2H_{5}OH$

∴ The formula of second member is $C_2H_5OH$ which is called as ethanol.

• Thus from the above data it is inferred that the name and formula of the second member of the carbon compounds having functional group -OH is Ethanol ($C_2H_5OH$).

Learn more about such concept

Write homologous series of alcohol with first three members.

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