Chemistry Past Questions and Answers

X is a crystalline salt of sodium solution of X in water turns litmus red and produces a gas which turns lime water milky when added to sodium carbonate. With barium chloride solution, X gives hydrochloric acid. X is

The alkanol obtained from the production of soap is

The flame used by welders in cutting metals is

Consecutive members of an alkane homologous serires differ by

If an element has the electronic configuration 1s <sup style='font-size: smaller;'>2</sup> 2s<sup style='font-size: smaller;'>2</sup> 2p<sup style='font-size: smaller;'>3</sup> 3s<sup style='font-size: smaller;'>2</sup> 3p<sup style='font-size: smaller;'>4</sup>, it is