Alcohols, Phenols and Ethers

An organic compound which contains a-OH functional group is called :
The correct order of acidity of the alcohols is ?
Which of the following reaction does not lead to formation of an alkanol?
The number of primary alcoholic isomers for $${ C }_{ 4 }{ H }_{ 10 }O$$ is:
Tertiary alcohol on treatment with cyanide in presence of conc. $${ H }_{ 2 }{ SO }_{ 4 }$$ gives corresponding primary amine. This reaction is called as :