Write the structural formula of 4-chloro-2-pentene.

Write the name of element which is confirmed on adding Na₂[Fe(CN)₅NO] in sodium extract solution due to appearance of violet colouration.

Why is an organic compound fused with sodium in Lassaigne's test?

In Carius method, sulphur is estimated by precipitating it as which compound?

Which method is used to extract a compound in aqueous solution?

Name three types of chromatography.

An organic liquid decomposes below its boiling point. How will you purify it?

For testing halogens in an organic compound with AgNO₃ solution sodium extract (Lassaigne's test) is acidified with dilute HNO₃. What will happen if a student acidifies the extract with dilute H₂SO₄ in place of diluate HNO₃?

What is meant by delocalization?

Which bond is more polar in the following pairs of molecules:
(a) H₃C - H or H₃C - Br
(b) H₃C - NH₂ or H₃C - OH
(c) H₃C - OH or H₃C - SH

Identify the most stable species in the following set of ions giving reasons
\(\overset { - }{ C } { H }_{ 3 },\overset { - }{ C } { H }_{ 2 }CI,\overset { - }{ C } { H }CI_{ 2 },\overset { - }{ C } CI_{ 3 }\)

How many \(\sigma\) and  \(\pi\) bonds are present in each of the following molecules?
\(CH_{ 3 }-CH=CH-CH_{ 2 }-C\equiv CH\)

Give the common name of (a) methanol, (b) ethanol, (c) ethoxyethane, (d) ethanoic acid, (e) 1, 4 - dimethyl benzene.