The number of pentyl alcohols producing blue colouration in the Victor-Meyer's test is .

Answer

3

Explanation

`2^@` alcohols give blue colouration in Victor-Meyer's test due to the formation of pseudonitrole. The three `2^@` alcohols are :
`CH_(3)CH_(2)CH_(2)-CHOH-CH_(3)(2^@)` ,
`CH_(3)CH_(2)-CHOH-CH_(2)CH_(3)(2^@)` ,
`CH_(3)-overset(CH_3)overset(|)CH-overset(OH)overset(|)CH-CH_(3)(2^@)`