Sodium oxalate on heating with conc. $H_2SO_4$ gives

Correlate the items listed in Column $I$ with those listed in Column $II$. Find out as many correlations as you can.

Column $I$	Column $II$
$A$. Synthesis gas	$1$. $Na_2[Na_4(PO_3)_6]$
$B$. Dihydrogen	$2$. Oxidising agent
$C$. Heavy water	$3$. Softening of water
$D$. Calgon	$4$. Reducing agent
$E$. Hydrogen peroxide	$5$. Stoichiometric compounds of $s-$block elements
$F$. Salt like hydrides	$6$. Prolonged electrolysis of water
	$7$. $Zn + NaOH$
	$8$. $Zn + dil. H_2SO_4$
	$9$. Synthesis of methanol
	$10$. Mixture of $CO$ and $H_2$

Match the following and identify the correct option.

$a. CO_{(g)} + H_{2(g)}$	$i. Mg(HCO_3)_2 + Ca(HCO_3)_2$
$b. \text{Temporary hardness of water}$	$ii. \text{An electron deficient hydride}$
$c. B_2H_6$	$iii. \text{Synthesis gas}$
$d. H_2O_2$	$iv. \text{Non-planar structure}$

When oxalic acid reacts with conc. $H_2SO_4$,two gases produced are of neutral and acidic in nature respectively. Potassium hydroxide absorbs one of the two gases. The product formed during this absorption and the gas which gets absorbed are respectively

In which of the following reactions,$H_2$ is liberated?
$i$. $Al_{(s)} + HCl_{(aq)} \rightarrow$
$ii$. $Al_{(s)} + NaOH_{(aq)} \rightarrow$
$iii$. $B_2H_{6(g)} + H_2O_{(l)} \rightarrow$
$iv$. $F_{2(g)} + H_2O_{(l)} \rightarrow$

Consider the following statements:
$I$. Atomic hydrogen is obtained by passing an electric arc through hydrogen gas.
$II$. Hydrogen gas does not reduce heated aluminum oxide.
$III$. Finely divided palladium absorbs a large volume of hydrogen gas.
$IV$. Pure nascent hydrogen is obtained by the reaction of $Na$ with $C_2H_5OH$.
Which of the above statements are correct?