Name the gas that rekindles a glowing splint.

From the list provided below choose the ones that match the description given.
Ferrous sulphate, Copper carbonate, Triferric tetroxide, Trilead tetroxide, Sulphur dioxide, Carbon dioxide, Lead nitrate, Zinc nitrate, Oxygen, Nitrogen,

A colourless gas which turns lime water milky but has no effect on acidified potassium dichromate paper.

The chemical equation for the combustion of ethane is
$2\mathrm{}{\mathrm{C}}_2{\mathrm{H}}_6+7{\mathrm{O}}_2\to 4\mathrm{}{\mathrm{C}\mathrm{O}}_2+6\mathrm{}{\mathrm{H}}_2\mathrm{O}$
$60\mathrm{}\mathrm{g}$ of ethane was completely burnt in oxygen. Answer the following question:

How would you test the presence of water as a product of this reaction?

Name the gas evolved when hydrochloric acid is added to zinc sulphate.

“Note: This question given in the book seems to have an error and the modified question should be as given below.”

Name the gas evolved when hydrochloric acid is added to zinc sulphide.

What do you observe:

Sulphur dioxide is passed through acidified ${\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7$ solution.