Identify the product of the following reaction: $\gamma$-butyrolactone + $BrMg-(CH_2)_4-MgBr$ $\xrightarrow[(ii) H_3O^{+}]{(i) THF}$

What is the product formed when chlorine reacts with ethanol?

Assertion : In fused state,calcium chloride cannot be used to dry alcohol or $NH_3$.
Reason : $CaCl_2$ is not a good dessicant.

Identify $Z$ in the following reaction sequence:
$(CH_3)_2CH-OH$ $\xrightarrow{PBr_3} X$ $\xrightarrow{alc. KOH} Y$ $\xrightarrow[(ii) H_3O^+]{(i) H_2SO_4} Z$

An optically active alcohol of formula $C_9H_{12}O_2$ produced the following compound when refluxed with $KMnO_4$. What is the structure of $(A)$? The original compound showed these properties also:
$\mathop {C_9H_{12}O_2}\limits_{(A)} \xrightarrow{Na} H_2 \text{ liberated}$
$\mathop {C_9H_{12}O_2}\limits_{(A)} \xrightarrow{Br_2} \text{ no rapid reaction}$
$\mathop {C_9H_{12}O_2}\limits_{(A)} \xrightarrow[{cool}]{CrO_3 / H^{+}} C_9H_8O_3$

Which of the following is called the Lucas reagent?