General Organic Chemistry PYQs Set 8 (PDF)

Set 8 of 22 · Questions 211-240 of 650

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NEET Chemistry · General Organic Chemistry · Set 8 (Q211-240)

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211.
Which of the following conformations will be the most stable ?
1. (1)
2. (2)
3. (3)
4. (4)
212.
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) $C H_{3} - C (C H_{3})_{2} - O^{-} N a^{+} + C H_{3} - C l$
213.
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) $C_{6} H_{5} N H_{2}$
214.
In which of the following molecules, all atoms are coplanar ?
1. (1)
2. (2)
3. (3)
4. (4) $(C H_{3})_{2} C = C (C N)_{2}$
215.
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) $(C H_{3})_{3} C— > C H_{3} C H_{2} — > (C H_{3})_{2} CH—$
216.
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) $B > C > A$
217.
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) $A \to II; B \to I; C \to IV; D \to III$
218.
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) $2-bromo-5-methylhexylpropanoate$
219.
Which one of the following compound is most acidic ?
1. (1) $ClCH2-CH2OH$
2. (2) $2-nitrophenol$
3. (3) $phenol$
4. (4) $2-methylphenol$
220.
Among the following compounds, the most acidic is :
1. (1) $p-nitrophenol$
2. (2) $p-hydroxybenzoic acid$
3. (3) $o-hydroxybenzoic acid$
4. (4) $p-toluic acid$
221.
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) $iv > iii > i > ii$
222.
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) $Both A and R are correct but R is NOT the correct explanation of A$
223.
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) $n -Pentane$
224.
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) $c>b>a>d>e$
225.
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) $s p^{3}, s p^{2}, sp, s p^{3}$
226.
$Match the LIST-I with LIST-II$
$LIST - I$ $LIST - II$
$A. Carbocation of$ $I. Species that can supply a pair of electrons.$
$B. C-Free radical$ $II.$
$Species that can receive a pair of electrons. C. Nucleophile III. sp^{2} hybridized carbon with empty p-orbital. D. Electrophile IV. sp^{2} / sp^{3} hybridized carbon with one unpaired electron. Choose the correct answer from the options given below:$
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) $A-III, B-IV, C-II, D-I$
227.
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) $the anion is obtained by removal of a proton from the acid molecule.$
228.
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) $3-Hydroxy-5-methylaniline$
229.
An organic compound ‘X’ showing the following solubility profile is:
1. (1) $o-Toluidine$
2. (2) $Oleic acid$
3. (3) $m- Cresol$
4. (4) $Benzamide$
230.
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) $5-chloro-4-fluoro-4, 5-dimethylnon-7-en-3-ol$
231.
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) $(A) and (C)$
232.
Among the following compounds, which one has the shortest $C - Cl$ bond?
1. (1)
2. (2)
3. (3)
4. (4)
233.
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) $+ I effect.$
234.
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) $B, C and D only$
235.
Given below are two statements :
Statement I : Sulphanilic acid gives esterification test for carboxyl group.
Statement II : Sulphanilic acid gives red colour in Lassigne's test for extra element detection.
choose the most appropriate answer from the options given
1. (1) $Statement I is correct but Statement II is incorrect.$
2. (2) $Both Statement I and Statement II are incorrect$
3. (3) $Both Statement I and Statement II are correct$
4. (4) $Statement I is incorrect but Statement II is correct.$
236.
In the given compound, the number of $2^{\circ}$ carbon atom $/ s$ is_____
1. (1) $Four$
2. (2) $Two$
3. (3) $One$
4. (4) $Three$
237.
A liquid was mixed with ethanol and a drop of concentrated $H_{2} S O_{4}$ was added. A compound with a fruity smell was formed. The liquid was :
1. (1) $HCHO$
2. (2) $C H_{3} C O C H_{3}$
3. (3) $C H_{3} COOH$
4. (4) $C H_{3} OH$
238.
The order of stability of the following tautomeric compounds is :
1. (1) $III > II > I$
2. (2) $II > I > III$
3. (3) $II > III > I$
4. (4) $I > II > III$
239.
Arrange the following carbocations in decreasing order of stability.
1. (1) $A > C> B$
2. (2) $A > B > C$
3. (3) $C> B > A$
4. (4) $C> A > B$
240.
The order of relative stability of the contributing structure is

Choose the correct answer from the options given below:
1. (1) $I > II > III$
2. (2) $II > I > III$
3. (3) $I = II = III$
4. (4) $III > II > I$