What is formed when glycerol reacts with $HI$?

Which of the following oxidation reactions can be carried out with chromic acid in aqueous acetone at $5 - 10^{\circ}C$?

$C_2H_5OH + 4I_2 + 3Na_2CO_3 \longrightarrow X + HCOONa + 5NaI + 3CO_2 + 2H_2O$
In the above reaction,'$X$' is

The reaction sequence is as follows:
$2\text{-methylcyclohexanol}$ $\xrightarrow{H^+, \Delta} (A)$ $\xrightarrow{\text{cold dil. } KMnO_4} (B)$ $\xrightarrow{CrO_3} (C)$
Identify the product $(C)$.

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

Which of the following hydroxy ethers gives a $+ve$ test with Tollen's reagent?