General Organic Chemistry PYQs Set 7 (PDF)

Set 7 of 25 · Questions 181-210 of 724

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Mere Teacher · Previous Year Questions JEE Main Chemistry · General Organic Chemistry · Set 7 (Q181-210)
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181. $Stability order of following alkoxide ions is$ (1) $C > B > A$ (2) $A > C > B$ (3) $B > A > C$ (4) $C > A > B$ 182. $Match items of column I and II Column I (Mixture of compounds) (A). H_{2} O/ C H_{2} C 1_{2} (B). (C). Kerosene/ Naphthalene (D). C_{6} H_{12} O_{6} /NaCl Column II (Separation Technique) (I). Crystallization (II). Differential solvent extraction (III). Column chromatography (IV). Fractional Distillation Correct match is :$ (1) $A-(III), B-(IV), C-(II), D-(I)$ (2) $A-(I), B-(III), C-(II), D-(IV)$ (3) $A-(II), B-(III), C-(IV), D-(I)$ (4) $A-(II), B-(IV), C-(I), D-(III)$ 183. $Which amongst the following is the strongest acid ?$ (1) $C H B r_{3}$ (2) $C H C l_{3}$ (3) $C H I_{3}$ (4) $CH (C N)_{3}$ 184. $The IUPAC name of the following molecule is$ (1) $2-Methyl-5 nitro-1-chlorobenzene$ (2) $3-Chloro-4 methyl-1-nitrobenzene$ (3) $2-Chloro-1 methyl-4-nitorbenzene$ (4) $2-Chloro-4 nitro-1-methylbenzene$ 185. $The IUPAC name of the compound having the formula C H \equiv C - C H = c H_{2} is$ (1) $l‐butyne‐3‐ene$ (2) $but‐l‐yne‐3‐ene$ (3) $l‐butene‐3‐yne$ (4) $3 ‐butene‐l‐yne.$ 186. $Arrange the following conformational isomers of n-butane in order of their increasing potential energy :$ (1) $II < III < IV < I$ (2) $I < IV < III < II$ (3) $II < IV < III < I$ (4) $I < III < IV < II$ 187. $Rate of the reaction is fastest when Z is :$ (1) $Cl$ (2) $O C O C H_{3}$ (3) $O C_{2} H_{5}$ (4) $N H_{2}$ 188. $The increasing order of p K_{b} for the following compounds will be : (A) N H_{2} -CH= N H_{,} (B) (C) C H_{3} -NH- C H_{3}$ (1) $(A) < (B) < (C)$ (2) $(B) < (C) < (A)$ (3) $(B) < (A) < (C)$ (4) $(C) < (A) < (B)$ 189. $Which of the following species does not exert a resonance effect?$ (1) $C_{6} H_{5} OH$ (2) $C_{6} H_{5} NH_{2}$ (3) $C_{6} H_{5} Cl$ (4) $C_{6} H_{5} NH_{3}$ 190. $Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Cis form of alkene is found to be more polar than the trans form. Reason (R): Dipole moment of trans isomer of 2-butene is zero.In the light of the above statements, choose the correct answer from the options given below :$ (1) $(A) is false but (R) is true$ (2) $Both (A) and (R) are true and (R) is the correct explanation of (A)$ (3) $(A) is true but (R) is false$ (4) $Both (A) and (R) are true but (R) is NOT the correct explanation of (A)$ 191. $The correct order of increasing acid strength of the compounds. (A) C H_{3} C O_{2} H (B) M e O C H_{2} C O_{2} H (C) C F_{3} C O_{2} H (D) is$ (1) $B < D < A < C$ (2) $D < A < C < B$ (3) $D < A < B < C$ (4) $A < D < C < B$ 192. $Consider the following compounds : Hyperconjugation occurs in$ (1) $III only$ (2) $I and III$ (3) $I only$ (4) $II only$ 193. $Match List I with List II. List I Isomeric pairs A. Propanamine and N-Methylethanamine B. Hexan-2-one and Hexan-3-one C. Ethanamide and Hydroxyethanimine D. o-nitrophenol and p-nitrophenol List II Type of isomers I. Metamers II. Positional isomers III. Functional isomers IV. Tautomers Choose the correct answer from the options given below :-$ (1) $A-III,B-IV,C-I,D-II$ (2) $A-IV, B-III, C-I, D-II$ (3) $A-II, B-III, C-I, D-IV$ (4) $A-III, B-I, C-IV, D-II$ 194. $IUPAC name of the following is C H_{2} = C H - C H_{2} - C H_{2} - C \equiv C H$ (1) $1,5‐hexenyne$ (2) $l‐hexene‐5‐yne$ (3) $1‐hexyne - 5 ‐ene$ (4) $1,5‐hexynene.$ 195. $The stability of carbanions in the following. is in the order of$ (1) $(iv) >_{(} i i_{)} >_{(} ii i_{)} >_{(} i_{)}$ (2) $(i) > (iii) > (ii) > (i v)$ (3) $(i) > (ii) > (iii) > (i v)$ (4) $(ii) >_{(} ii i_{)} >_{(} i v_{)} >_{(} i_{)}$ 196. $The Kjeldahl's method for the estimation of nitrogen can be used to estimate the amount of nitrogen in which one of the following compounds?$ (1) (2) (3) (4) 197. $Thin layer chromatography of a mixture shows the following observation: The correct order of elution in the silica gel column chromatography is$ (1) $B,A, C$ (2) $B, C, A$ (3) $A, C,B$ (4) $C,A, B$ 198. $Correct order of stability of carbanion is -$ (1) $d > a > c > b$ (2) $a > b > c > d$ (3) $d > c > b > a$ (4) $c > b > d > a$ 199. $Which of the following compound will exhibit geometrical isomerism ?$ (1) $1-Phenyl-2-butene$ (2) $3-Phenyl-1-butene$ (3) $2-Phenyl-1-butene$ (4) $1,1-Diphenyl-1-propane$ 200. $Which of the following compounds shall not produce propene by reaction with HBr followed by elimination or direct only elimination reaction ?$ (1) $H_{3} C - C H_{2} - C H_{2} B r$ (2) (3) $H_{3} C - C H_{2} - C H_{2} O H$ (4) $H2C=C=O$ 201. $The correct IUPAC nomenclature for the following compound is:$ (1) $2-Methyl-5-oxohexanoic acid$ (2) $2-Formyl-5-methylhexan-6-oic acid$ (3) $5-Methyl-2-oxohexan-6-oic acid$ (4) $5-Formyl-2-methylhexanoic acid$ 202. $How many different stereoisomers are possible for the given molecule?$ (1) $2$ (2) $1$ (3) $4$ (4) $3$ 203. $Structure of the compound whose IUPAC name is 3‐Ethyl‐2‐hydroxy‐4‐methylhex‐3‐en‐ 5‐ynoic acid is$ (1) (2) (3) (4) 204. $Choose the correct name for compound given below:$ (1) $(4E)-5-Bromo-hex-4-en-2-yne$ (2) $(2E)-2-Bromo-hex-4-yn-2-ene$ (3) $(2E)-2-Bromo-hex-2-en-4-yne$ (4) $(4E)-5-Bromo-hex-2-en-4-yne$ 205. $Consider the acidity of the carboxylic acids: (i) PhCOOH (ii) o- N O_{2} C_{6} H_{4} COOH (iii) p- N O_{2} C_{6} H_{4} COOH (iv) m- N O_{2} C_{6} H_{4} COOH$ (1) $i > ii > iii > iv$ (2) $ii > iii > iv > i$ (3) $iii > ii > iv > i$ (4) $ii > iv > iii > i$ 206. $Consider the following three resonance structures The correct order of their stabilities is$ (1) $II > I > III$ (2) $I > II > III$ (3) $III > I > II$ (4) $III > II > I$ 207. $The species that can have a trans-isomer is: (en =ethane - 1, 2 - diamine, Ox = oxalate)$ (1) $(Zn (en) C l_{2})$ (2) $(Pt (en) C l_{2})$ (3) $(Cr (en)_{2} (Ox))^{2}$ (4) $(Pt (en)_{2} C l_{2})^{2 +}$ 208. $Nitrogen detection in an organic compound is carried out by Lassaigne’s test. The blue colour formed corresponds to which of the following formulae?$ (1) $F e_{3} [F e (C N)_{6}]_{2}$ (2) $F e_{4} [F e (C N)_{6}]_{3}$ (3) $F e_{4} [F e (C N)_{6}]_{2}$ (4) $F e_{3} [F e (C N)_{6}]_{3}$ 209. $In Carius method for estimation of halogens, 0.2 g of an organic compound gave 0.188 g of AgBr. The percentage of bromine in the compound is____.(Nearest integer) [Atomic mass :Ag = 108,Br = 80]$ 210. $The total number of 'sigma' and 'Pi' bonds in 2-oxohex-4-ynoic acid is_____$