EMIRATES FUTURE INTERNATIONAL ACADEMY  – ABU DHABI

PRACTICE WORKSHEET-11 

SUBJECT:CHEMISTRY CLASS: XI 

……………………………………………………………………………………………………………………………………………………………………………….. 

1.  Write the correct IUPAC name of the compound given below:

a) CH3 CH CH CH3  b)CH3 CO CH2 CH2 CHO

C2H5  CH3 

2.Arrange benzene, hexane and ethyne in decreasing order of acidic behaviour. Also give reasons for this behaviour.

3.Draw the structural isomers of pentane.

4. 0.2475g of an organic compound on combustion gave 0.4950 g of carbon dioxide and 0.2025 g of water.Calculate

the percentage of C and H in it.

5.what will happen during Lassaigne’s test for nitrogen if the compound also contains sulphur? 

6.Draw the resonance structures of acetate ion.

7.In Carius method of estimation of halogen,0.15 g of an organic compound gave 0.12 g of AgBr.Find out the percentage

Of bromine in the compound. (molar mass of AgBr= 188 g/ mol ,Atomic mass of Br = 80U)

8. Explain the geometrical isomerism in a) 2-methyl propene b) but-2-ene

9. Write chemical equations for the following reactions

a) Ethyne treated with mercuric sulphate and dilute sulphuric acid at 333K

b) Sodium salt of benzoic acid on heating with sodalime

10. an alkene ‘ A ‘ on ozonolysis gives a mixture of ethanol and pentan-3-one.Write structure and IPAC name of A

11. How the following conversions are done a) Ethyne to benzene b) Benzene to Toluene

12. What are the necessary conditions for any compound to show aromaticity? Explain Friedel-Crafts Acylation reaction.

13.Arrange three isomers of pentane in increasing order of their boiling point.