Which of the following will not give the iodoform test?

When alcohol vapor is passed over heated reduced copper,the alcohol is converted into an alkene. Which type of alcohol is it?

Which of the following is a secondary benzylic alcohol?

$A$ compound is soluble in concentrated ${H_2SO_4}$. It does not decolorize a solution of bromine in ${CCl_4}$. However,it is oxidized by chromic anhydride in aqueous sulfuric acid within two seconds,changing the color of the solution from orange to blue,green,and finally opaque. What does the original compound contain?

Assertion : The ease of dehydration of the following alcohols is as shown in the image.
Reason : Alcohols leading to conjugated alkenes are dehydrated to a greater extent.

Which isomer of $C_4H_9OH$ has the highest boiling point?