Write true or false for the following statements:

Esters react in the presence of an acid or a base to give back the alcohol and carboxylic acid.

Write true or false for the following statements:

Heating ethanol at 443 K with excess concentrated sulphuric acid results in the dehydration of ethanol to give ethene.

Write true or false for the following statements:

Esters are most commonly formed by reaction of an aldehyde with ketones.

Write true or false for the following statements:

Carbon, in its all allotropic forms, burns in oxygen to give nitrogen dioxide along with the release of heat and light.

Write true or false for the following statements:

Saturated hydrocarbons will generally give a clean flame while unsaturated carbon compounds will give a yellow flame with lots of black smoke.