Match the compounds given in Column I with the effects given in Column II. Column I Column II (i) Chloramphenicol (a) Malaria (ii) Thyroxine (b) Anaesthetic (iii) Chloroquine (c) Typhoid fever (iv) Chloroform (d) Goiter (e) Blood substituent

(i) Chloramphenicol is a broad-spectrum antibiotic used in the treatment of typhoid fever. (ii) Thyroxine is a hormone secreted by thyroid gland. Patient with hyperthyroidism have an enlarged thyroid gland i.e., goiter). (iii) Chloroquine prevents the development of malaria in blood. (iv) Chloroform is a colourless volatile liquid. Its vapours decreases the activity of central nervous system and is used as an anaesthetic. Column I Column II (i) Chloramphenicol (c) Typhoid fever (ii) Thyroxine (d) Goiter (iii) Chloroquine (a) Malaria (iv) Chloroform (b) Anaesthetic (e) Blood substituent

Match the items of Column I and Column II. Column I Column II (i) S N 1 reaction (a) vic-dibromides (ii) Chemicals in fire extinguisher (b) gem-dihalides (iii) Bromination of alkenes (c) Racemisation (iv) Alkylidene halides (d) Saytzeff rule (v) Elimination of HX from alkyl halide (e) Chlorobromocarbons

(i) S N 1 reaction is accompanied by racemisation. The carbocation formed in the slow step being sp 2 hybridised is planar and attack of nucleophile may take place from either side resulting in a mixture of products, one having the same configuration and other having inverted configuration. (ii) Bromochlorodifluoromethane is a haloalkane with the chemical formula CF 2 ClBr . It is used for fire suppression and is a chlorobromocarbon. (iii) Alkenes react in the cold with pure liquid bromine, or with a solution of bromine in an organic solvent like tetrachloromethane. The double bond breaks, and a bromine atom becomes attached to each carbon. The bromine loses its original red-brown colour to give a colourless liquid. (iv) Alkylidene dihalides are also known as geminal halides. The term gem has derived from geminal meaning for the same position. The two similar halogen atoms are attached to the same carbon atom. (v) Zaitsev's rule (or Saytzeff's rule, Saytzev's rule) is an empirical rule for predicting the favoured alkene product in elimination reactions. More generally, Saytzeff's rule predicts that in an elimination reaction, the most substituted product will be the most stable, and therefore the most favoured. Column I Column II (i) S N 1 reaction (c) Racemisation (ii) Chemicals in fire extinguisher (e) Chlorobromocarbons (iii) Bromination of alkenes (a) vic-dibromides (iv) Alkylidene halides (b) gem-dihalides (v) Elimination of HX from alkyl halide (d) Saytzeff rule

E M B I B E

NCERT Exemplar Chemistry - Class 12>Chapter 10 - Haloalkanes and Haloarenes>Matching Type

Matching Type

Author:NCERT

NCERT Chemistry Solutions for Exercise - Matching Type

Simple step-by-step solutions to Matching Type questions of Haloalkanes and Haloarenes from NCERT Exemplar Chemistry - Class 12. Also get 3D topic explainers, cheat sheets, and unlimited doubts solving on EMBIBE.

Questions from Matching Type with Hints & Solutions

MEDIUM

12th CBSE

IMPORTANT

NCERT Exemplar Chemistry - Class 12>Chapter 10 - Haloalkanes and Haloarenes>Matching Type>Q 79

Match the compounds given in Column I with the effects given in Column II.

Column I	Column II
(i) Chloramphenicol	(a) Malaria
(ii) Thyroxine	(b) Anaesthetic
(iii) Chloroquine	(c) Typhoid fever
(iv) Chloroform	(d) Goiter
	(e) Blood substituent

HARD

12th CBSE

IMPORTANT

NCERT Exemplar Chemistry - Class 12>Chapter 10 - Haloalkanes and Haloarenes>Matching Type>Q 80

Match the items of Column I and Column II.

Column I	Column II
(i) $S_{N} 1$ reaction	(a) vic-dibromides
(ii) Chemicals in fire extinguisher	(b) gem-dihalides
(iii) Bromination of alkenes	(c) Racemisation
(iv) Alkylidene halides	(d) Saytzeff rule
(v) Elimination of $HX$ from alkyl halide	(e) Chlorobromocarbons