ॐ असतो मा सद्गमय
Yes, alcohol is an exempt good though it is not leviable to tax. It is required to treat all non-leviable goods and leviable-but-non-taxable goods to be classified as exempt goods in order to restrict input tax credit.
(ICAI FAQ PUBLICATION 06-09-2017 EXEMPTION ON SUPPLY OF GOODS: FAQ NO. 22)
Five petroleum products i.e., petroleum crude, high speed diesel, motor spirit, natural gas and aviation turbine fuel are excluded from levy for the time being and as such petrol is non-taxable good.
(ICAI FAQ PUBLICATION 06-09-2017 EXEMPTION FROM SUPPLY OF GOODS: FAQ NO. 21)