$CH_2 = CH_2$ $\xrightarrow{HBr} X$ $\xrightarrow{\text{Hydrolysis}} Y$ $\xrightarrow[I_2 \text{ excess}]{Na_2CO_3} Z$. What is $Z$ in the given reaction?

What is the major product of the following reaction?

Which of the following compounds are not oxidized by $HIO_4$?
$(1)$ $CH_3-CH(OH)-CH_2-OH$
$(2)$ $CH_3-C(=O)-CHO$
$(3)$ $CH_3-C(=O)-C(=O)-CH_3$
$(4)$ $CH_3-C(=O)-CH(NH_2)-CH_3$
$(5)$ Cyclohexene oxide
$(6)$ $CH_3-O-CH_2-CH_2-OH$
$(7)$ $HOOC-CH_2-OH$

What is the $IUPAC$ name of the organic compound formed in the following chemical reaction?
Acetone $\xrightarrow[(ii) H_2O, H^{+}]{(i) C_2H_5MgBr, \text{dry Ether}}$ Product

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

Most acidic alcohol out of the following compounds is