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CBSE - Class 11 Chemistry Organic Chemistry – Some Basic Principles and Techniques Worksheet

1.

Carbonyl compounds especially ketone undergo reduction to form

a.

Primary alcohol

 b.

Secondary alcohol

 c.

Alkane

 d.

Alkene
2.

For the following bond cleavages, use curved-arrows to show the electron flow and classify each as homolysis or heterolysis. Identify reactive intermediate produced as free radical, carbocation and carbanion.

(d) 

3.
Draw formulas for the first five members of each homologous series beginning with the following compounds. (b) $CH_3COCH_3$
4.
Draw the resonance structures for the following compounds. Show the electron shift using curved-arrow notation. (c) $CH_3CH=CHCHO$
5.
Discuss the principle of estimation of halogens, sulphur and phosphorus present in an organic compound.
6.
Write bond line formulas for : Isopropyl alcohol, 2,3-Dimethylbutanal, Heptan-4-one.
7.

Which of the following carbocation is most stable ?

a.

$(CH_3)_3C. C^+H_2$

 b.

$(CH_3)_3C^+$

 c.

$CH_3CH_2C^+H_2$

 d.

$CH_3C^+H CH_2CH_3$
8.
Classify the following reactions in one of the reaction type studied in this unit. (a) $CH_3CH_2Br + HS^– \rightarrow CH_3CH_2SH + Br^–$
9.
In the Lassaigne’s test for nitrogen in an organic compound, the Prussian blue colour is obtained due to the formation of:
a. (a) $Na_4[Fe(CN)_6]$ b. (b) $Fe_4[Fe(CN)_6]_3$ c. (c) $Fe_2[Fe(CN)_6]$ d. (d) $Fe_3[Fe(CN)_6]_4$
10.

The best method for the conversion of alcohol into alkyl halide is:

a.

 By using PCl?

 b.

By using SoCl2

 c.

By using HCL

 d.

By using NaBr
11.
Differentiate between the principle of estimation of nitrogen in an organic compound by (i) Dumas method and (ii) Kjeldahl’s method.
12.
Give condensed and bond line structural formulas and identify the functional group(s) present, if any, for : (c) Hexanedial
13.
Identify the reagents shown in bold in the following equations as nucleophiles or electrophiles: (c) $C_6H_6 + CH_3C^+O \rightarrow C_6H_5COCH_3$
14.
Explain the terms Inductive and Electromeric effects. Which electron displacement effect explains the following correct orders of acidity of the carboxylic acids? (a) $Cl_3CCOOH > Cl_2CHCOOH > ClCH_2COOH$
15.

Give the IUPAC names of the following compounds : (e) 

16.
Draw the resonance structures for the following compounds. Show the electron shift using curved-arrow notation. (e) $C_6H_5–C^+H_2$
17.
Give condensed and bond line structural formulas and identify the functional group(s) present, if any, for : (b) 2-Hydroxy-1,2,3-propanetricarboxylic acid
18.
Classify the following reactions in one of the reaction type studied in this unit. (b) $(CH_3)_2C = CH_2 + HCl \rightarrow (CH_3)_2ClC – CH_3$
19.
Draw the resonance structures for the following compounds. Show the electron shift using curved-arrow notation. (f) $CH_3CH=CHC^+H_2$
20.
Explain the terms Inductive and Electromeric effects. Which electron displacement effect explains the following correct orders of acidity of the carboxylic acids? (b) $CH_3CH_2COOH > (CH_3)_2CHCOOH > (CH_3)_3C.COOH$

Worksheet Answers

1.
Option B
7.
9.
10.
Option B
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