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

2

(a)

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

2

(a)

 

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

2

(a)

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

2

(a)

What is meant by delocalization?

2

(a)

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?

2

(a)

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

2

(a)

Name three types of chromatography.

2

(a)

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

2

(a)

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

2

(a)

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

2

(a)

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

2

(a)

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

2

(a)