How would you distinguish experimentally between an alcohol and a carboxylic acid?

A mixture of oxygen and ethyne is burnt for welding. Can you tell why a mixture of ethyne and air is not used?

Write two properties of covalent compounds.

Draw the structures for the following compounds : (i) Ethanoic acid (ii) Bromopentane* (iii) Butanone (iv) Hexanal. *Are structural isomers possible for bromopentane.

What will be the formula and electron dot structure of cyclopentane?

What are the two properties of carbon which lead to the huge number of carbon compounds we see around us?