General Organic Chemistry PYQs Set 9 (PDF)

Set 9 of 25 · Questions 241-270 of 724

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JEE Main Chemistry · General Organic Chemistry · Set 9 (Q241-270)

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241.
Considering the state of hybridization of carbon atoms, find out the molecule among the following which is linear?
1. (1) $CH3-CH=CH-CH3$
2. (2) $CH3-C\equivC-CH3$
3. (3) $CH2=CH-CH2-C\equivCH$
4. (4) $CH3-CH2-CH2-CH3$
242.
Which of the following conformations will be the most stable ?
1. (1)
2. (2)
3. (3)
4. (4)
243.
What are the suitable rectant for the following ether synthesis
1. (1) $C H_{3} - C (C H_{3})_{2} - O^{-} N a^{+} + P h - C H_{2} - C l$
2. (2) $P h - C H (C l) - C H_{2} - C H_{3} + C H_{3} - C H (O^{-} N a^{+}) - C H_{3}$
3. (3) $C H_{3} - C (C H_{3})_{2} - C l + P h C H_{2} O^{-} N a^{+}$
4. (4) $C H_{3} - C (C H_{3})_{2} - O^{-} N a^{+} + C H_{3} - C l$
244.
Considering the basic strength of amines in aqueous solution, which one has the smallest $p K_{b}$ value?
1. (1) $(C H_{3})_{2} NH$
2. (2) $C H_{3} N H_{2}$
3. (3) $(C H_{3})_{3} N$
4. (4) $C_{6} H_{5} N H_{2}$
245.
In which of the following molecules, all atoms are coplanar ?
1. (1)
2. (2)
3. (3)
4. (4) $(C H_{3})_{2} C = C (C N)_{2}$
246.
In the following benzyl/allyl system
R – CH = $C H_{2}$ and (R is alkyl group)
Then decreasing order of inductive effect is :
1. (1) $(C H_{3})_{3} C— > (C H_{3})_{2} CH— > C H_{3} C H_{2} —$
2. (2) $C H_{3} C H_{2} — > (C H_{3})_{2} CH— > (C H_{3})_{3} C—$
3. (3) $(C H_{3})_{2} CH— > C H_{3} C H_{2} — > (C H_{3})_{3} C—$
4. (4) $(C H_{3})_{3} C— > C H_{3} C H_{2} — > (C H_{3})_{2} CH—$
247.
Arrange the following compounds in increasing order of $C - OH$ bond lengthMethanol Phenol p -Ethoxyphenol
(A) B (C)
1. (1) $A > B > C$
2. (2) $A > C > B$
3. (3) $C > B > A$
4. (4) $B > C > A$
248.
Match List-I with List-II.
$List-I Element detected (A) Nitrogen (B) Sulphur (C) Phosphorus (D) Halogen List-II Reagent used/Product formed (I) N a_{2} [Fe (CN)_{5} NO] (II) A g N O_{3} (III) F e_{4} [Fe(CN)_{6}]_{3} (IV) (N H_{4})_{2} M o O_{4}$
Choose the correct answer from the options given below:
1. (1) $A \to Ill; B \to I; C \to IV; D \to II$
2. (2) $A \to II; B \to IV; C \to I; D \to III$
3. (3) $A \to IV; B \to II; C \to I; D \to III$
4. (4) $A \to II; B \to I; C \to IV; D \to III$
249.
The IUPAC name of the following compound is:
1. (1) $n-propyl-2-bromo-5-methylheptanoate$
2. (2) $n-propyl-1-bromo-4-methylhexanoate$
3. (3) $2-bromo-5-methylpropanoate$
4. (4) $2-bromo-5-methylhexylpropanoate$
250.
Which one of the following compound is most acidic ?
1. (1) $ClCH2-CH2OH$
2. (2) $2-nitrophenol$
3. (3) $phenol$
4. (4) $2-methylphenol$
251.
Among the following compounds, the most acidic is :
1. (1) $p-nitrophenol$
2. (2) $p-hydroxybenzoic acid$
3. (3) $o-hydroxybenzoic acid$
4. (4) $p-toluic acid$
252.
Arrange the following free radicals in the correct order of their stability
(i) $CH_{2} = C ∙ H$ (ii) $C ∙ H_{3}$
(iii) $CH_{3} - C ∙ H - CH_{3}$ (iv) $(CH_{3})_{3} C$
1. (1) $i > ii > iii > iv$
2. (2) $iv > iii > ii > i$
3. (3) $i < ii < iii < iv$
4. (4) $iv > iii > i > ii$
253.
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : Order of acidic nature of the following compounds is A > B > C.

Reason R: Fluoro is a stronger electron withdrawing group than Chloro group.
In the light of the above statements, choose the correct answer from the options given below :
1. (1) $A is false but R is true$
2. (2) $Both A and R are correct and R is the correct explanation of A$
3. (3) $A is true but R is false$
4. (4) $Both A and R are correct but R is NOT the correct explanation of A$
254.
Which of the following compounds possesses the " $C - H$ " bond with the lowest bond dissociation energy?
1. (1) $Benzene$
2. (2) $2,2-Dimethylpropane$
3. (3) $Toluene$
4. (4) $n -Pentane$
255.
Decreasing order of reactivity towards electrophilic substitution for the following compounds is:
1. (1) $d>a>e>c>b$
2. (2) $e>d>a>b>c$
3. (3) $a>d>e>b>c$
4. (4) $c>b>a>d>e$
256.
The hybridisation of each carbon in the following compound respectively is
1. (1) $s p^{3}, s p^{2}, s p^{3}, sp$
2. (2) $s p^{3}, s_{r^{3}}^{3}, s p^{2}, sp$
3. (3) $s p^{3}, sp, s p^{3}, s p^{2}$
4. (4) $s p^{3}, s p^{2}, sp, s p^{3}$
257.
$Match the LIST-I with LIST-II$
$LIST - I$ $LIST - II$
$A. Carbocation of$ $I. Species that can supply a pair of electrons.$
$B. C-Free radical$ $II.$
$Species that can receive a pair of electrons. C. Nucleophile III. sp^{2} hybridized carbon with empty p-orbital. D. Electrophile IV. sp^{2} / sp^{3} hybridized carbon with one unpaired electron. Choose the correct answer from the options given below:$
1. (1) $A-IV, B-II, C-III, D-I$
2. (2) $A-II, B-III, C-I, D-IV$
3. (3) $A-III, B-IV, C-I, D-II$
4. (4) $A-III, B-IV, C-II, D-I$
258.
In the anion $H C O O^{-}$ the two carbon-oxygen bonds are found to be of equal length. What is the reason for it?
1. (1) $electronic orbitals of carbon atom are hybridised$
2. (2) $the C=O bond is weaker than the C-O bond$
3. (3) $the anion H C O O^{-} has two resonating structures$
4. (4) $the anion is obtained by removal of a proton from the acid molecule.$
259.
The IUPAC name of the following compound is
1. (1) $5-Methyl-3-aminophenol$
2. (2) $3-Amino-5-methylphenol$
3. (3) $3-Amino-5-hydroxy toluene$
4. (4) $3-Hydroxy-5-methylaniline$
260.
An organic compound ‘X’ showing the following solubility profile is:
1. (1) $o-Toluidine$
2. (2) $Oleic acid$
3. (3) $m- Cresol$
4. (4) $Benzamide$
261.
The IUPAC name of the following compound is
1. (1) $5-chloro-4-fluoro-3-hydroxy-4,5-dimethylnon-7ene$
2. (2) $4-fluoro-5-chloro-4, 5-dimethylnon-8-en-3-ol$
3. (3) $5-chloro-6-fluoro-5, 6-dimethylnon-2-en-7-ol$
4. (4) $5-chloro-4-fluoro-4, 5-dimethylnon-7-en-3-ol$
262.
Which compound $(s)$ out of the following is/are notaromatic?
1. (1) $(B), (C) and (D)$
2. (2) $(C) and (D)$
3. (3) $(B)$
4. (4) $(A) and (C)$
263.
Among the following compounds, which one has the shortest $C - Cl$ bond?
1. (1)
2. (2)
3. (3)
4. (4)
264.
Chloroacetic acid is a stronger acid than acetic acid. This can be explained using
1. (1) $- M effect$
2. (2) $- I effect$
3. (3) $+ M effect$
4. (4) $+ I effect.$
265.
From the figure of column chromatography given below, identify incorrect statements.

(A) Compound 'c' is more polar than 'a' and 'b'
(B) Compound 'a' is least polar
(C) Compound 'b' comes out of the column before 'c' and after 'a'
(D) Compound 'a' spends more time in the column Choose the correct answer from the options given below
1. (1) $A, B and D only$
2. (2) $A B and C only$
3. (3) $B and D only$
4. (4) $B, C and D only$
266.
$Number of optical isomers possible for 2 - chlorobutane_______$
267.
$The total number of contributing structures showing hyperconjugation (involving C-H bonds) for the following carbocation is$
268.
$A chloro compound " A ". (i) forms aldehydes on ozonolysis followed by the hydrolysis. (ii) when vaporized completely 1.53 g of A, gives 448 mL of vapour at STP. The number of carbon atoms in a molecule of compound A is ____.$
269.
$Number of geometrical isomers possible for the given structure is/are______$
270.
$When 0.15g of an organic compound was analyzed using Carius method for estimation of bromine, 0.2397g of AgBr was obtained. The percentage of bromine in the organic compound is ___ (Nearest integer) [Atomic mass: Silver =108, Bromine =80]$