//M1//QN1//MCQ//DL0//EQ

(i) (ii) CH 3 CH 2 CH 2 CH 2 Br (iii) 9. In which of the following molecules carbon atom marked with asterisk (*) is asymmetric ?10. Which of the following structure is enantiomeric with the molecule (A) given below:

Class 12 Chemistry (Part 2) 004
11. Which of the following is an example of

vicinal-dihallide?12. The position of – Br in the compound

CH3CH = CHC(Br)(CH3)2, can be classified as:13. Chlorobenzene is formed by reaction of chlorine with benzene in the presence of AlCl3. Which of the following species attacks the benzene ring in this reaction?14. What is A in the following reaction?

(A)
(B)
(C)
(D)
15. Ethylidene chloride is a/an ________.16. A primary alkyl halide would prefer to undergo:17. Which of the following alkyl halides will undergo SN1 reaction most rapidly?18. Which is the correct IUPAC name of ?19. What should be the correct IUPAC name for diethylbromomethane?20. The reaction of toluene with chloride in the presence of iron and in the absence of light yields.21. Chloromethane on treatment with excess of ammonia yields mainly:22. Molecules whose mirror image is non superimposable over them are known as chiral. Which of the following molecule is chiral in nature?23. Reaction of C6H5CH2Br with aqueous sodium hydroxide follows:24. Which of the carbon atoms present in the molecule given below are asymmetric?25. Which of the following compounds will give racemic mixture on nucleophilic substitution by OH– ion?
(i) (ii)
(iii)
26. Arrange the following compounds in increasing order of rate of reaction towards nucleophilic substitution reaction. (i) (ii) (iii) 27. Arrange the following compounds in increasing order of rate of reaction towards nucleophilic substitution reaction. (i) (ii) (iii) 28. Arrange the following compounds in increasing order of rate of reaction towards nucleophilic substitution reaction. (i) (ii) (iii) 29. Arrange the following compounds in increasing order of rate of reaction towards nucleophilic substitution reaction. (i) (ii) (iii) 30. Which is the correct increasing order of boiling points of the following compounds?
Butane, 1-Iodobutane, 1-Bromobutane, 1-Chlorobutane
< 1-Bromobutane < 1-Iodobutane
< 1-Chlorobutane < Butane
< 1-Bromobutane < 1-Chlorobutane
< 1-Iodobutane < 1-Bromobutane
31. Which is the correct increasing order of boiling points of the following compounds? 1-Bromoethane, 1-Bro mopropane, 1-Bromobutane, Bromobenzene.
< 1-Bromopropane < 1-Bromoethane
< 1-Bromopropane < 1-Bromobutane
< 1-Bromoethane < Bromobenzene
< 1-Bromobutane < Bromobenzene
1. What is the hybridization of carbon atom having halogen atom in haloarene compounds ?2. Which structure represents vicinal dihalide?3. Which structure represents vinyl halide?4. Which compound represents allylic halide?5. Which structure represents allyl halide?6. Which structure represents geminal dihalides?7. Propyl iodide and isopropyl iodide are:8. Which sentence indicates alkylidine compounds?9. Which compound represents secondary halide?10. Which substance is a primary halide?11. From which substance trihalogen haloform compound is obtained?12. How many π-bonds are present in benzene hexa chloride (B.H.C.)?13. Which molecular formula represents benzylic halide?14. Identify structure of benzylic halide:15. Identify ethylidene dibromide:16. Formula of geminal dihalide is _______:17. Which of the following is the structure of alkylene dihalide?18. Match the Column A with Column B.19. Which halogen element present in thyroxine?20. Give the IUPAC name of 21. What is the IUPAC name of ?22. Give the IUPAC name of

Br – CH2 – C ≡ C – CH2Br23. Indicate the structural formula of

1-chloro-4-secbutyl-2-methyl benzene.

(A)
(B)
(C)
(D)
24. The IUPAC name of the compound, (CH3)2CHCH2CH2Br is:25. What is common name of 3-bromopropene?26. The order of polarity of CH3I, CH3Br and CH3Cl molecules follows the order:27. Which substance has highest dipole moment?28. Which substance has highest melting point?29. Which of the following substances has the highest bond enthalpy?30. Which of the following substance has the weakest bond enthalpy?31. Methyl bromide reacts with AgF to give methyl fluoride and silver bromide. This reaction is called:32. The following reaction is known by which name? C 2 H 5 OH + SOCl 2

C

2 H 5 Cl + SO 2(g) + HCl(g)33. Which product is obtained by reaction between 2-methyl propene and HBr?34. Mention the main product obtained by reaction between silver acetate and bromine water in presence of carbon disulphide.35. Which products are obtained by reaction between ethanol and thionyl chloride in presence of catalyst pyridine?36. Which reaction gives the product 2,2-dibromo propane?37. Indicate the decreasing order of reactivity of HX for reaction R – OH + HX → R – X + H2O.38. CH2 = CH – CCl3 + HBr → _______ product is obtained.39. Mention the type of reaction for the reaction between propane and chlorine gas in presence of sunlight.40. Identify correct method to prepare methyl fluoride?41. Which reagent is not appropriate to prepare alkyl halide from alcohol?42. Identify industrial method to prepare ethyl bromide.43. X C2H5Cl; Y CH3COCl, identify X and Y.44. An alkyl halide may be converted into an alcohol by:45. Preparation of alkyl halides in laboratory is least preferred by:46. Ethyl alcohol gives ethyl chloride on treatment with:47. Number of monochloro derivatives obtained when neo-pentane is chlorinated, is48. The reaction RCl + Nal R – I + NaCl is known as:49. Which of the following can be obtained by halide exchange method?50. Bromination of methane in presence of sunlight is a:51. Anti-Markovnikov addition of HBr is not observed in.52. In the preparation of chlorobenzene from aniline, the most suitable reagent is.53. In the chemical reactions, The compounds 'A' and 'B' respectively are:54. + Cl2 M Diphenyl In this reaction identify molecule (M) and Reagent (R).55. Which of the following is possible at lower temperature?56. On reaction of aniline with NaNO2 and HCl at 273K temperature, which product is obtained.57. How many s and p bonds are present in benzene diazonium chloride?58. The correct order of melting and boiling points of the primary (1°), secondary (2°) and tertiary (3°) alkyl halides is:59. Which substance has highest boiling point?60. For a given alkyl group, the densities/b. p. are in the order:61. Arrange the following compounds in the decreasing order of their boiling points. (i) CH 3 Br (ii) CH 3 CH 2 Br (iii) CH 3 CH 2 CH 2 Br (iv) CH 2 CH 2 CH 2 CH 2 Br 62. Which of the following has the highest boiling point?63. Which of the following has the highest density?64. Identify density order of following compounds.65. Dehydrohalogenation in haloalkanes produces:66. The greater the ionic character of the carbon metal bond:67. The order of reactivities of methyl halides in the formation of Grignard reagent is:68. On treating a mixture of two alkyl halides with sodium metal in dry ether, 2-methyl propane was obtained. The alkyl halides are:69. The given reaction is an example of, C 2 H 5 Br + KCN(aq) → C 2 H 5 CN + KBr:70. Aryl halides are less reactive towards electrophiles than alkyl halides due to:71. In Wurtz reaction, alkyl halide reacts with72. X + KCN → CH3CN CH3CH2NH2, what is (X)?73. Reaction of alkyl halides with aromatic compounds in presence of anhy, AlCl3 is known as:74. 1, 2-dibromo cyclohexane on dehydrohalogenation gives75. Which one of the following is not true for the hydrolysis of t-butyl bromide with aqueous NaOH?76. Grignard reagent is prepared by the reaction between:77. A mixture of sodium acetate and sodalime is heated and the product treated with excess of chlorine in presence of bright sunlight. The product is:78. 1-Chlorobutane on reaction with alcoholic KOH gives:79. Which halide does not get hydrolysed by sodium hydroxide?80. Optically active compound is:81. Which one is the most reactive towards SN1 reactions?82. Which of the following applies in the reaction, CH 3 CH(Br)CH 2 CH 3 (i) CH 3 CH = CHCH 3 (major product) (ii) CH 2 = CHCH 2 CH 3 (minor product)83. Reaction of t-butyl bromide with sodium methoxide produces84. An alkyl iodide on standing darkens, due to:85. X compound reacts with Na to give CH3CH2CH2CH3, then compound X is:86. Mention the reaction conditions to convert ethyl bromide into ethyl alcohol.87. Which two alkyl chloride on heating with Na metal in presence of dry ether give isobutane?88. Which substance gives fast SN2 reaction?89. What is obtained by reaction between tertiary butyl bromide and CH3ONa?90. C6H5Cl + KCN → X Y then X and Y are respectively?91. Mention the type of dehydrohalogenation reactions of alkyl halide.92. What is obtained when alkyl halide is heated with Mg metal in presence of dry ether?93. Identify reaction condition for given reaction?
94. 95. C6H5CH2Br ______ ?96. Match the Column A with Column B.97. Identify (Z) in the following reaction series, C 2 H 5 l (X) (Y) (Z):98. t-butyl chloride preferably undergo hydrolysis by?99. n-Propyl bromide reacts with ethanolic KOH to form:100. Compound 'A' reacts with alcoholic KOH to yield compound 'B' which on ozonolysis followed by reaction with Zn/H2O gives methanal and propanal. Compound 'A' is _______.101. 9.65 C of electric current is passed through fused anhydrous magnesium chloride. The magnesium metal thus, obtained is completely converted into a Grignard reagent. The number of moles of the Grignard reagent obtained is102. When 32.25 g of ethyl chloride is subjected to dehydrohalogenation reaction the yield of the alkene formed is 50%. The mass of the product formed is (atomic mass of chlorine is 35.5)103. SN1 reaction is favoured by:104. CH3Br + OH– → CH3OH + Br– reaction proceeds by SN2 mechanism. Its rate is dependent on the concentration of:105. The C–Mg bond in CH3CH2MgBr is:106. In SN1 reaction, the first step involves the formation of:107. Which alkyl halide is preferentially hydrolysed by SN1 mechanism?108. The Mg–Br bond in CH3CH2MgBr is:109. Which of the following statements about SN2 mechanisms is incorrect?110. The end product (Q) is in the following sequence of reaction: 111. Which of the following reactions will give the major and minor products? 112. SN1 reaction of alkyl halides leads to:113. (CH3)3CMgBr on reaction with D2O produces114. 'A' is:
(A)
(B)
(C)
(D)
115. CH3CH2CH2Cl B C D In the above reaction, the product D is116. Identify the end product (C) in the following sequence:
C
117. Fittig reaction can be used to prepare:118. The antiseptic character of iodoform is due to:119. Which one of the following compound reacts with chlorobenzene to produce DDT?120. Chloroform is kept in dark coloured bottles because:121. Solvent used in dry-cleaning of clothes is:122. CCl4 is insoluble in water because: 123. Identify IUPAC name of the phosgene.124. Which substance damages the layer of ozone gas?125. How many chlorine atoms are present in D.D.T.?126. Which statement is wrong about chloroform?127. Which of the following is not inflammable?128. Chloroform is slowly oxidised by air in the presence of light and air to form:129. Which of the following have antiseptic property?130. Assertion : Reaction of CH3–CH(Br)–CH2–CH3 with alcoholic KOH gives CH 3 – CH = CH – CH3. Reason : The elimination reaction follows Markovnikov's law.131. Assertion : CH2=CH–CH2–X is an example of an allylic halide. Reason : In an allylic halide, the halogen atom is bonded to the carbon atom, which has sp 2 hybridization.132. Assertion : Haloalkanes react with KCN to form alkyl cyanide as the major product, while reacting with AgCN to form isocyanide as the major product. Reason : KCN and AgCN both are ionic compounds.133. Assertion : If the –NO2 group is present in the ring, it is easy to replace the –Cl group with –OH in chlorobenzene. Reason : The nitro group leads to strengthening of the C-Cl bond in chlorobenzene. 134. Assertion : The SN2 mechanism proceeds with racemization, whereas the SN1 mechanism proceeds with complete stereochemical inversion. Reason : SN2 is a two-step reaction, whereas SN1 is a one-step reaction.135. Assertion : The common name of 1,1-dichloroethane is ethylidene chloride. Reason : Ethylidene chloride is a geminal dihalide.136. Assertion : In haloarenes, electrophilic substitution processes occur slowly and require more challenging conditions compared to benzene. Reason : Halogens are ortho- and para-directing.137. Assertion : The melting points of symmetrical dihalobenzene are almost the same. Reason : The molecular weights of symmetrical dihalobenzene are different.138. Assertion : For the SN1 mechanism, the order of reactivity of alkyl halides is 3° R-X > 2° R-X > 1° R-X. Reason : The mechanism follows a carbocation formation pathway.139. Assertion : Aryl halides are highly reactive towards nucleophilic substitution reaction. Reason : In the case of aryl halides, the halogen atom is bonded to a carbon atom that has sp hybridization.140. Assertion : The boiling points of alkyl halide compounds follow the order: R-I > R-Br > R-Cl > R-F. Reason : Alkyl chloride, bromide, and iodide compounds with almost similar molecular weights have higher boiling points than hydrocarbon compounds.141. Assertion : The Wurtz reaction of tert-butyl bromide gives 2,2,3, 3-tetramethylbutene. Reason : In the Wurtz reaction, when an alkyl halide is treated with sodium in dry ether, a hydrocarbon with twice the number of carbon atoms compared to the alkyl halide is obtained.142. Assertion : The substitution of the –Cl group from chlorobenzene by the -OH group is more difficult compared to chloroethane. Reason : In chlorobenzene, the C-Cl bond exhibits some characteristics of a partial double bond.143. Assertion : The reaction of methyl chloride with KCN produces methyl cyanide. Reason : CN– is a strong nucleophile.144. Assertion : 3° alkyl halides are more reactive for the SN1 mechanism. Reason : In the SN1 mechanism, the reaction rate depends on the concentration of the alkyl halide.145. Assertion : The hydrolysis of (-)-2-bromo-octane results in the inversion of configuration. Reason : This reaction occurs through the formation of a carbocation.146. Assertion : CHCl3 is filled to the top in a coloured glass bottle. Reason : CHCl3 forms phosgene when exposed to air.147. Assertion : Alkyl halides are insoluble in water. Reason : Although alkyl halides are polar, they do not form hydrogen bonds with water molecules.148. Assertion : The reaction of styrene (vinyl benzene) with HBr gives 1-bromo-1-phenylethene. Reason : The benzyl radical is more stable than the alkyl radical.149. Assertion : The reaction of 2-bromobutane with alcoholic KOH gives but-2-ene. Reason : The hydrogen on the C3 carbon is more acidic than the hydrogen on the C1 carbon.150. Assertion : Chlorobenzene is less reactive towards electrophilic substitution reactions than benzene. Reason : In chlorobenzene, the resonance effect makes the carbocation unstable.151. Assertion : (CH3)2CH-CH2-CH3 can undergo free radical monochlorination to form four different monochloro isomers. Reason : (CH3)2CH–CH2–CH3 has four different types of hydrogen atoms.152. Assertion : The halogen atom cannot replace the -OH group of phenol to form an aryl halide compound. Reason : Phenol reacts violently with halogen acids.153. Choose the correct option for the True (T) and False (F) statements given below: (i) Chloramphenicol is useful in the treatment of malaria. (ii) Halothane is used as an anesthetic during surgery. (iii) Chloroquine is used as a medicine to treat typhoid. (iv) Halobenzene contains a halogen atom attached to a carbon hav ing sp 2 hybridization.154. Choose the correct option for the True (T) and False (F) statements given below: (i) The reactivity of alcohols for the Lucas test follows the order: 3° > 2° > 1°. (ii) 3-Bromo cyclohex-1-ene is an allylic halide. (iii) 1-Bromo-2,2-dimethyl propane is a tertiary alkyl halide. (iv) 4-Bromo-toluene is a benzylic halide.155. Choose the correct option for the True (T) and False (F) statements given below: (i) The dipole moment (polarity) of C–X bonds (where X = F, Cl, Br, I) decreases from C–F to C–I. (ii) 1,2-Dichloroethane is called a geminal dihalide. (iii) Free radical monochlorination of 2-methylbutane gives four different structural isomers. (iv) Alkyl iodide can be obtained from alkyl bromide by the Finkelstein process.156. Choose the correct option for the True (T) and False (F) statements given below: (i) Iodobenzene is not a Sandmeyer product. (ii) Haloarenes can be obtained from aromatic hydrocarbons by the n ucleophilic s ubstitution r eaction. (iii) Photochemical chlorination of neopentane gives only one monochloro product. (iv) The boiling point of the para isomer in a dihaloarene compound is higher than that of the ortho and meta isomers.157. Choose the correct option for the True (T) and False (F) statements given below: (i) The boiling point increases from primary to tertiary in isomeric haloalkanes. (ii) The density increases as the number of equivalent halogens increases in alkyl halides containing similar carbons. (iii) N O 2 is an amphiphilic Nucleophilic reagent. (iv) Haloalkane compounds react with KCN to form cyanide, whereas with AgCN they form isocyanide.158. Choose the correct option for the True (T) and False (F) statements given below: (i) An alkyl halide with a chiral carbon gives a 1:1 mixture of both enantiomers in an S N 1 reaction. (ii) The product obtained from the S N 2 reaction of a haloalkane shows inversion of configuration. (iii) Enantiomers of enantiomeric compounds cannot superimpose on each other. (iv) A racemic mixture shows optical activity.159. Choose the correct option for the True (T) and False (F) statements below: (i) The reactivity of tertiary butyl bromide in an S N 2 reaction is the highest. (ii) If a compound rotates plane-polarized light to the right, it is said to be dextrorotatory. (iii) 2, 3-Dihydroxypropanal shows the property of chirality. (iv) The S N 2 reaction of an alkyl halide takes place in a single step.160. Choose the correct option for the True (T) and False (F) statements below: (i) The nucleophilic substitution process of chlorobenzene cannot occur through S N 1 mechanism. (ii) A racemic mixture rotates plane-polarized light to the right. (iii) A compound with four different atoms or groups attached to carbon is optically active. (iv) A reaction involving a Grignard reagent is carried out in dry ether to easily remove side products.161. Choose the correct option for the True (T) and False (F) statements below: (i) The reaction of two moles of aryl halides with sodium in dry ether is called the Wurtz-Fitting reaction. (ii) The production of Freon-1, 2 is done through the Swarts reaction from trichloromethane. (iii) Freon gas disturbs the natural ozone balance. (iv) Contact of CH 2 Cl 2 with human eyes can burn the cornea.162. Choose the correct option for the True (T) and False (F) statements below: (i) The reactivity of chlorobenzene increases when a -NO 2 group is added to the ortho and para positions, but adding a -NO 2 group to the meta position has no effect on reactivity. (ii) Chloroform has pesticidal properties. (iii) DDT is a chlorine-containing organic pesticide. (iv) The Wurtz reaction of a haloalkane results in an alkene hydrocarbon with double the carbon count.163. Choose the correct option for the following true (T) and false (F) statements: (i) The correct increasing order of reactivity for nucleophilic substitution reactions is: Chlorobenzene < m-Nitrochlorobenzene < o-Nitrochlorobenzene. (ii) The reaction of aqueous sodium hydroxide with C 6 H 5-CH 2 Br follows the S N 2 mechanism. (iii) The correct increasing order of boiling points is: 1-Chlorobenzene < 1-Bromobutene < 1-Iodobutene. (iv) The nucleophilic substitution reaction of with OH– ion gives a

racemic mixture.164. Choose the correct option for the following true (T) and false (F) statements: (i) S N 2 mechanism is not applicable to tertiary alkyl halides. (ii) The rate of the S N 2 mechanism depends on the concentration of the nucleophile. (iii) The product from the S N 2 reaction of chloromethane with OH⁻ shows inversion of configuration. (iv) The S N 1 mechanism occurs in two steps, whereas the S N 2 mechanism occurs in one step.

Column-A | Column-B
(1) Benzyl bromide | (M)
(2) Ethylidene bromide | (N) CH 3 CHBr 2
(3) Phenyl bromide | (O) CH 2 = CHCH 2 Br
(4) Allyl bromide | (P)

(A) TFFT (B) FFTF (C) FFTT (D) TFTT

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