What are the products obtained when acetaldehyde and acetone are treated with separately with conc. `H_(2)SO_(4)` ?

The product obtained when acetaldehyde is treated with dilute NaOH is

HCOOH reacts wihth conc. H_(2)SO_(4) to produce

The gas liberated when aluminium reacts with conc. H_(2)SO_(4) is

Two test tubes containing a nitrate and a bromide are treated separately with conc, H_(2)SO_(4) brown fumes evolved are passed in water. The water will be coloured by vapours evolved from the test tube containing

The compound which gives carbon with conc. H_(2)SO_(4)

Write the common and IUPAC names of products obtained when acetone is treated with dry HCl.

Mark the compound which gives carbon with conc. H_(2)SO_(4) :

Acetaldehyde when treated with dilute NaOH gives