Chlorine and Mark

Chemistry : Important Questions For CBSE Class XII ( Haloalkanes and Haloarenes)
(Q.1) Choose the incorrect statement about the benzyl chloride: ( 1 mark )
(a) It is less reactive than alkyl halides.
(b) It can be oxidized to benzaldehyde by boiling with copper nitrate solution.
(c) It is a lachrymatory liquid and answers beilstein’s test.
(d) It gives a white precipitate with alcoholic silver nitrate
(Q.2) Dry ether
The reaction RX + 2Na + RX _______________? R-R + 2NaXis called. ( 1 mark )
(a) Sandmeyer’ reaction
(b) Fittig reaction
(c) Wurtz reaction
(d) Williamson’s synthesis
(Q.3) Substitution of chlorine takes place readily at higher temperature in : ( 1 mark )
(a) CH3CH=CH2
(b) H2C=CH2
(c) HC C
(d) None of the above
(Q.4) (CH3)3CMgBr on reaction with D2O gives: ( 1 mark )
(a) (CH3)3CD
(b) (CH3)3COD
(c) (CD3)3CD
(d) (CD3)3OD
(Q.5) The silver salt of fatty acid on refluxing with an alkyl halide gives an: ( 1 mark )
(a) Acid
(b) Ester
(c) Ether
(d) Amine
(Q.6) Which of the following is the most reactive towards nucleophilic substitution reaction? ( 1 mark )
(a) C6H5Cl
(b) CH2=CHCl
(c) ClCH2CH=CH2
(d) CH3CH=CHCl
(Q.7) The molecule with the highest dipole moment is: ( 1 mark )
(a) CH3Cl
(b) CH2Cl2
(c) CHCl3
(d) CCl4
(Q.9) What is added to chloroform to prevent to form phosgene gas: ( 1 mark )
(a) CH3COCH3
(b) C2H5OH
(c) CH3COOH
(d) CH3OH
(Q.10) The most reactive nucleophile among the following is: ( 1 mark )
(a) CH3O-
(b) C6H5O-
(c) (CH3)2CHO-
(d) (CH3)3CO-
(Q.11) The correct order of decreasing dipole moment is: ( 1 mark )
(a) CH3Cl, CH3Br, CH3F
(b) CH3Cl, CH3F, CH3Br
(c) CH3Br, CH3Cl, CH3F
(d) CH3Br, CH3F, CH3Cl
(Q.12) HCl and HI do not give anti- markovnikov’s addition to alkenes in the presence of peroxides because: ( 1 mark )
(a) Both are highly ionic
(b) One is oxidizing and other is reducing
(c) One of the step is endothermic in both the cases
(d) All the steps are exothermic in both the reactions.