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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Addition of hydrogen bromide to propenoic acid gives `CH_(3)-overset(CH_(3))overset(|)(CH)-Br`A. Propenoyl bromideB. 2-bromo propenoic acidC. 3-bromopropanoic acidD. 3-bromo propenoic acid |
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Answer» Correct Answer - C `H_(2)C=CH-overset(O)overset(||)(C)-OH overset(HBr)to H_(2)underset(Br) underset(|)(C)-CH=overset(OH)overset(||)(C)-OH rArr H_(2)underset(Br)underset(|)(C)-CH_(2)-overset(O)overset(||)(C)-OH` |
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| 52. |
Lactic acid gives n number of geometrical isomeric products on strong heating along. What is the value of n? |
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Answer» Correct Answer - 2 Heating effect on lactic acids. |
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| 53. |
What is the exact number of isomeric forms of the alcohol produced in saponification of exclusively dextro form of `H_(3)C-underset(Et)underset(|)(HC)-O-overset(O)overset(||)(C)-CH_(3)` |
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Answer» Correct Answer - 1 1, Only dextro. |
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| 54. |
The product formed in the reaction is `CH_(3)-underset(O)underset(||)(C)-CH_(2)-underset(O)underset(||)(C)-OC_(2)H_(5)overset(D^(+))to` productA. `CH_(3)-underset(O)underset(||)(C)-CD_(2)-underset(O)underset(||)(C)-OC_(2)H_(5)`B. `CH_(3)-underset(O)underset(||)(C)=CH-underset(O)underset(||)(C)-OC_(2)H_(5)`C. `D_(3)C-underset(O)underset(||)(C)-CH_(2)-underset(O)underset(||)(C)-OC_(2)H_(5)`D. none of these |
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Answer» Correct Answer - A Activa hydrogens (Acidic) are deuterated. |
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| 55. |
Which of the following is hydrolysed to the maximum extent ? |
| Answer» Acidhalides are more reactive due to leaving ability | |
| 56. |
An organic compound reacts (i) with metallic sodium to liberate hydrogen and (ii) with `Na_(2)CO_(3)` solution to liberate `CO_(2)`. The compound isA. an alcoholB. a carboxylic acidC. an etherD. an ester |
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Answer» Correct Answer - 2 `2CH_(3)CO H+2Nato2CH_(3)CO Ona+H_(2)` |
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| 57. |
Which of the following will give readily a hydrocarbon ?A. `R-cO Ona overset("Electrolysis")to`B. `RCO Oag overset(I_(2))to`C. `CH_(3)CH_(3)overset(I_(2)//hv)to`D. `(CH_(3))_(2)C Cl_(2) overset(C_(2)H_(5)OH)to` |
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Answer» Correct Answer - 1 `CH_(3)CO Ona+NaOH overset(CaO)underset("(Sodaline)")toCH_(4)+Na_(2)CO_(3)` |
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| 58. |
Statement 1 : Use of `Br_2` and `PCl_3` on Carboxylic acid results in `alpha-` chlorination, not brimination. Statement 2 : The halogenation actually takes place on acyl halide formed from the carboxylic acid and the catalyst.A. Statement -1 is true, statement -2 is true, statement -2 is a correct explanation for statement 1.B. Statement -1 is true, statement 2 is true, statement -2 is not a correct explanation for statement 1C. Statement -1 is true, Statement-2 is false,D. Statement -1 is false, Statement -2 is true. |
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Answer» Correct Answer - d HVZ reaction |
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| 59. |
Which one is more reactive in nucleophilic acyl substituion. Why is it so ? `F_(3)C-overset(O)overset(||)(C)-O-C_(2)H_(5) ` or `H_(3)C-overset(O)overset(||)(C)-O-C_(2)H_(5)` |
| Answer» `F_(3)C-overset(O)overset(||)(C)-O-C_(2)H_(5)` is more reactive than `H_(3)C-overset(O)overset(||)(C)-O-C_(2)H_(5)` in nucleophilic acyl substituion. The electron withdrawing `CF_(3)` group polarizes the carbony carbon. | |
| 60. |
Carboxylic acids having at least one `alpha`-hydrogen react with `Cl_(2)` or `Br_(2)` in the presence of phosphorous to give `alpha`-halo acids. The reaction is known as Hell -volhar-Zelinsky reaction (HVZ reaction). `R-CH_(2)-CO OH overset(P//Br_(2))underset(Delta)toR-CH(Br)CO OH` The HVZ reaction is limited to the formation of `alpha`-chloro and `alpha`-bromo acids and it is sometimes backward to carry out. the reagents (`X_(2)` and `P`) are noxious and the reaction time is often long and the conditions of reaction are harsh. `CH_(3)-CO OH overset(Br_(2)//P)to(A) overset(NaCN)to(B) overset(HOH//H^(+))to(C)` The product (C) will beA. B. C. D. |
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Answer» Correct Answer - 1 Presence of `alpha`-hydrogen atoms |
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| 61. |
Carboxylic acids having at least one `alpha`-hydrogen react with `Cl_(2)` or `Br_(2)` in the presence of phosphorous to give `alpha`-halo acids. The reaction is known as Hell -volhar-Zelinsky reaction (HVZ reaction). `R-CH_(2)-CO OH overset(P//Br_(2))underset(Delta)toR-CH(Br)CO OH` The HVZ reaction is limited to the formation of `alpha`-chloro and `alpha`-bromo acids and it is sometimes backward to carry out. the reagents (`X_(2)` and `P`) are noxious and the reaction time is often long and the conditions of reaction are harsh. Which of the following will be obtained when acetic acid is subjected to HVZ reaction ?A. `BrCH_(2)CO OH`B. `Br-overset(Br)overset(|)underset(Br)underset(|)(C)-CO OH`C. `Br-overset(Br)overset(|)underset(Br)underset(|)(C)-CO OH`D. All of these |
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Answer» Correct Answer - 4 Absence of `alpha`-hydrogen atoms |
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| 62. |
Methanoic acid, the first member of carboxylic acid series, when warmed with concentrated sulphuric acid decompose in the following way and evolve carbon monoxide. The driving force for this reaction lies in the fact that the `HC-=O^(+)` ion is very unstable acid and thus easily loses `H^(+)`. What happens when acetic acid is treated with conc. `H_2 SO_4`?A. `CO+H_(2)O`B. `CH_(4)+CO_(2)`C. `CO+CH_(4)`D. no reaction |
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Answer» Correct Answer - D No reaction |
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| 63. |
Methanoic acid, the first member of carboxylic acid series, when warmed with concentrated sulphuric acid decompose in the following way and evolve carbon monoxide. The driving force for this reaction lies in the fact that the `HC-=O^(+)` ion is very unstable acid and thus easily loses `H^(+)`. If acetic acid is replaced by triphenylacetic acid, the products formed will beA. `(C_(6)H_(5))_(3)CH+CO`B. `(C_(6)H_(5))_(3)CH+CO_(2)`C. `(C_(6)H_(5))_(3)COH+CO`D. no reaction |
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Answer» Correct Answer - C `pPh_(3)C-CO OH overset(H_(2)SO_(4))underset(Delta)toPh_(3)C-CHO+Co` |
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| 64. |
Methanoic acid, the first member of carboxylic acid series, when warmed with concentrated sulphuric acid decompose in the following way and evolve carbon monoxide. The driving force for this reaction lies in the fact that the`HC-=O^(+)` ion is very unstable acid and thus easily loses `H^(+)`. Formic acid on heating with conc. `H_2 SO_4` givesA. `CO_(2)+H_(2)`B. `CO+H_(2)O`C. `CO`D. `H_(2)O` |
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Answer» Correct Answer - B `HCO OH overset(H_(2)SO_(4))underset(Delta)toCO+H_(2)C` |
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| 65. |
The reaction of formic acid with concentrated `H_2 SO_4` givesA. `CH_(3)CO OH`B. `CO_(2)+H_(2)O`C. `CO+H_(2)O`D. HCHO |
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Answer» Correct Answer - C Formic acid undergoes dehydration when treated with conc. `H_(2)SO_(4)` |
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| 66. |
Which hydrogen atom of acetic acid is replaced by `Cl_(2)` in presence of red P ?A. `alpha`-hydrogenB. carboxylic hydrogenC. both 1 and 2D. oxygen of carboxylic group |
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Answer» Correct Answer - 1 `CH_(3)CO OH overset(Red p)underset(Cl_(2))tounderset("monochloro acetic acid ")(CH_(2)ClCO OH overset(Red P)underset(Cl_(2))tounderset("di-chloro acetic acid")(CHCl_(2)CO OH) CO OH)` `CH_(2)CO CH_(2)Cl_2 CO OH overset(redP)(underset(Cl_(2))underset("tri-chloro acetic acid")(Cl_(3)C CO OH)` In the above reaction `alpha` hydrogens are replaced by chlorine |
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| 67. |
Match the column `{:("Column I","Column II"),"(A) Acetic acid","(p) decolourieses acid " MnO_(4)^(-) "Solution"),("(B) Formic acid","(q) Blood red colouration with neutral " FeCl_(3)),("(C) Picric acid","(r) decomposes evolving " CO_(2) "on heating above" 200^(@)C),("(D) Oxalic acid","(s) Reduces Fehiling solution"):}` |
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Answer» Correct Answer - A-q,B-p,r,s,C-q,D-p,r Properties of caborxylic acids |
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| 68. |
When `CH_(2)=CH -CO OH` is reduced with `LiAlH_(4)` the compound obtained will beA. `CH_(2)=CH-CH_(2)OH`B. `CH_(3)-CH_(2)-CH_(2)OH`C. `CH_(3)-CH_(2)-CHO`D. `CH_(3)-CH_(2)-CO OH` |
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Answer» Correct Answer - 1 `LiAlH_(4)` can reduce COOH group and not the C=C double bond.`CH_(3)=CH-CO OH overset(LiAlH)toCH_(3)=CH-CH_(3)OH` |
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| 69. |
Benzoyl chloride is prepared from benzoic acid byA. `Cl_(2),hv`B. `SO_(2)Cl_(2)`C. `SOCl_(2)`D. `Cl_(2)H_(2)O` |
| Answer» `C_(6)H_(5)CO OH +SOCl_(2)to C_(6)H_(5)COCl+SO_(2)+HCl` | |
| 70. |
Which of the following is/are correct regarding the reaction A. Here selectively carbonyl group will be reduced.B. The product obtained is same what it could be in case of the reagent `LiAlH_(4)`C. The product will be a racemic mixtureD. One mole of `NaBH_(4)` reduces four moles of 5-keto haxanoic acid |
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Answer» Correct Answer - a,c,d `LiAlH_(4)` reduces carboxylic group as well. |
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| 71. |
Compared to alcohol explain why phenols cannot be converted into easters by direct reaction with carboxylic acid. |
| Answer» Phenol due to resonance stabilisation are less nucleophilic than alcohols and so fail to attack the protonated carbonyl carbon of the acids to form esters. | |
| 72. |
Select correctly matched with major product :A. B. `Ph-CH=CHCONH_(2)overset(KOBr)toPhCh=CH-NH_(2)`C. `H_(2)N-underset(O)underset(||)C-NH_(2)underset(Cl_(2))overset(NaOH)toHN_(2)-NH_(2)`D. `Ph-CequivC-COOHunderset(H_(2)SO_(4),Delta)overset(HN_(3))toPhCH_(2)COOH` |
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Answer» Correct Answer - A::D (b) `PhCH_(2)-CHO` (c ) `N_(2)` |
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| 73. |
Probable structure of P is :A. B. C. D. |
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Answer» Correct Answer - A Correct option (a) as all other nitrogen lone pairs in the given structure are participating in resonance. |
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| 74. |
Which of the following is/are wrong?A. `MeCO-NH_(2)` gives bad smelling substance with `CHCl_(3)`KOHB. Phenol reacts with `"C"Cl_(4)` in presence of NaOH to give salicylic acid, carbene is the intemediate formed during this reactionC. Carbene is the real attacking intermaediate in Simmon Smith reactionD. Ethymethanoate reacts with excess of methyl magnesium bromide, followed by hydrolysis to produce a `3^(@)` alcohol. |
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Answer» Correct Answer - A::B::C::D (a) : Primary amines form isocyannide with `CHCl_(3)`+KOH not amides. (b) : `"C"Cl_(4)` directly attacks on the ring. No.carbone formation. (c ) : Not carbene but carbennoid is the attacking species. (d) : Product in the given reaction : `H-underset(O)underset(||)C-O-+RMgX` is a `2^(@)` alcohol. |
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| 75. |
Each question has 5 choices (a) ,(b) ,(c ) (d) and (e ) out of which ONLY ONE is correct. (a) Statement -1 is True, Statement -2 is True , Statement -2 is a correct explanation for Statement -1. (b) Statement -1 is True, Statement -2 is True, Statement -2 is NOT a correct explanation for Statement -1. (C ) Statement -1 is True, Statement -2 is False. (d) Statement -1 is False, Statement -2 is True. (e) Statement -1 and Statement -2 both are False. Statement -1: Formation of aromatic diazonium salt take place with all aromatic amine when they reacts with `NaNO_(2)//HCl`. Statement -2: `overset(o+)`N=O is electrophile during the formation of Diazonium salt. |
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Answer» Correct Answer - D Statement-1 is not correct because `2^(@)` to `3^(@)` aromatic amine do not form diazonium salt. |
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| 76. |
Structure of A is :A. B. C. D. |
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Answer» Correct Answer - B `NH_(2)` is a better Nucleophile than OH and it attacks from less hindered side. |
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| 77. |
Each question has 5 choices (a) ,(b) ,(c ) (d) and (e ) out of which ONLY ONE is correct. (a) Statement -1 is True, Statement -2 is True , Statement -2 is a correct explanation for Statement -1. (b) Statement -1 is True, Statement -2 is True, Statement -2 is NOT a correct explanation for Statement -1. (C ) Statement -1 is True, Statement -2 is False. (d) Statement -1 is False, Statement -2 is True. (e) Statement -1 and Statement -2 both are False. Statement -1: Rate of decarboxylation in `F-CH_(2)-COOH gt Cl-CH_(2)COOH ` Statement -2: Electronegativity of F is more than that of Cl. |
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Answer» Correct Answer - D `F-overset(ϴ)CH_(2)` is less stable than `Cl-overset(ϴ)CH_(2)` due to d-orbital resonance. |
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| 78. |
(Major product in hemiacetal form) :A. B. C. D. |
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Answer» Correct Answer - B Migratory aptitude is strictly followed only when back bonding stabilized `C^(o+)` is formed. |
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| 79. |
Select correct statement :A. Product mixture is having no optical activity if alcohol is fully consumed.B. Organic product is having no `O^(18)`.C. This reaction follows `A_(AL^(2))` mechanism.D. None of the above |
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Answer» Correct Answer - D Rate of reaction of chiral compound is different with enantiomers, so with limited alcohol the ester will not be formed in even amount. |
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| 80. |
Product (A) of above reaction is :A. B. C. D. |
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Answer» Correct Answer - B It is Arndt-Eistert homologation. |
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| 81. |
`Ph-overset(O)overset(||)C-O-CPh_(3) overset(18)overset(H_(3)O^(oplus))rarr` Product of this reaction is :A. `Ph-overset(O)overset(||)C-OH+Ph_(3)C-overset(18)OH`B. `Ph-overset(18)overset(O)overset(||)C-OH+Ph_(3)C-OH`C. `Ph-overset(O)overset(||)C-overset(18)OH+Ph_(3)C-overset(18)OH`D. `Ph-overset(O)overset(||)C-overset(18)OH+Ph_(3)C-OH` |
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Answer» Correct Answer - A Esters which give stable carbocation reacts by `A_(AL^(1))` mechanical. |
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| 82. |
Match the acids given in Column I with their correct IUPAC names given in Column II. A. i-(b) ,ii-(e) iii-d iv-(a) v -(c)B. i-e ii-(b) iii-(e) iv -(a) v-(c)C. i-(b) ii-(d) iii-(e) iv -(a) v-(c)D. i-(b) ii-(e) iii-(a) iv -(d) v-(c) |
| Answer» Correct Answer - 1 | |
| 83. |
Dicarboxylic acids have carboxylic groups e.g. HOOC-COOH,oxalic acid HOOC`-CH_(2)-`COOH-Maloic acid HOOC-`(CH_(2))_(3)`-COOH-Glutaric acid HOOC,`(CH_(2))_(4)`-COOH,-Adipic acid Acidity of dicarboxylic acids depends upon the stabillity of intermediate ion and upon the distance between two carboxylic groups. shorter the distance between two carboxylic groups, greater is the acididc character. Melting point of the acids depends on the symmetry. greater the symmetry, higher will be the mp. Dicarboxylic acids on heating give monocarboxylic acid, alkanes, cyclic ketones dependings on the conditions. Which of the following is the most acidic ?A. Oxalic acidB. Maloic acidC. Succinic acidD. Adipic acid |
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Answer» Correct Answer - 1 Sodium phenoxide and sodium benzoate is formed |
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| 84. |
Dicarboxylic acids have carboxylic groups e.g. HOOC-COOH,oxalic acid HOOC`-CH_(2)-`COOH-Maloic acid HOOC-`(CH_(2))_(3)`-COOH-Glutaric acid HOOC,`(CH_(2))_(4)`-COOH,-Adipic acid Acidity of dicarboxylic acids depends upon the stabillity of intermediate ion and upon the distance between two carboxylic groups. shorter the distance between two carboxylic groups, greater is the acididc character. Melting point of the acids depends on the symmetry. greater the symmetry, higher will be the mp. Dicarboxylic acids on heating give monocarboxylic acid, alkanes, cyclic ketones dependings on the conditions. Which of the following dicarboxylic acid is used in the manufactures of nylon-6,6?A. Succinic acidB. Glutaric acidsC. adipic acidD. Oxalic acid |
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Answer» Correct Answer - 3 Due to +I effect of `CH_(3)` groups |
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| 85. |
Which of the following compound is formed as major product when ethyl propanoate and ethyl methanoate are reacted in the presence of sodium ethoxide in ethyl alcohol followed by acidification?A. `H_(5)C_(2)O-overset(O)overset(||)(C)-underset(CH_(3))underset(|)(CH)-overset(O)overset(||)(C)-OC_(2)H_(5)`B. C. D. `H_(3)C-CH_(2)-overset(O)overset(||)(C)-overset(O)overset(||)(C)-OC_(2)H_(5)` |
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Answer» Correct Answer - C Crossed Claisen ester condensation |
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| 86. |
End product of this conversion `CH_(3)-overset(O)overset(||)(C)-CH_(2)-CH_(2)-CH_(2)-CO_(2)H overset(1. NaBH_(3))underset(2.H_(2)O,H^(+))to` isA. B. C. D. |
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Answer» Correct Answer - a `NaBH_(4)` reduces reactant to |
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| 87. |
Which of the following has highest tendency to ionise in aqueous solution ?A. HCOOHB. `CH_(3)CO OH`C. `FCH_(2)CO OH`D. `BrCH_(2)CO OH` |
| Answer» Correct Answer - 3 | |
| 88. |
`beta`-chlorobutyric acid is name in IUPACA. 2-chlorobutanoic acidB. 2-chlorobuteric acidC. 3-chlorobutanoic acidD. 3-chlorobuteric acid |
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Answer» Correct Answer - 3 `CH_(3)-underset(Cl)underset(|)(CH)-CH_(2)-CO OH` |
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| 89. |
Which of the following Carboxylic acids donot undergo decarboxylation on heating?A. B. C. D. |
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Answer» Correct Answer - c Negative charge does not exist at bridge head carbon |
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| 90. |
Which of the following orders regarding the base strength of a leaving group in a reaction of an acid derivative with a nucleophile is correct :A. `Cl^(-) gt RCO O^(-) gt RO^(-)`B. `Cl^(-) gt RO^(-) gtRCO O^(-)`C. `RO^(-) gt RCO O^(-) gt Cl^(-)`D. `RO^(-) gt Cl^(-) gt RCO O^(-)` |
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Answer» Correct Answer - C Based on order of nucleophilicity |
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| 91. |
Of the following orders regarding basicity which are incorrectA. `CH_(3)CH_(2)NH_(2) gt PhCONH_(2) gt CH_(3)CONH_(2)`B. `CH_(3)CH_(2)NH_(2) lt PhCONH_(2) gt CH_(3)CONH_(2)`C. `CH_(3)CH_(2)NH_(2) gt PhCONH_(2) lt CH_(3)CONH_(2)`D. `CH_(3)CH_(2)NH_(2) lt CH_(3)CONH_(2)` |
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Answer» Correct Answer - B,C,D Aliphatic amines are more basic than amides |
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| 92. |
Which of the following orders of acid strength is correct?A. `RCOOHgtROHgtHOHgtHC-=CH`B. `RCOOHgtHOHgtC_(2)H_(5)OHgtHC-=CH`C. `RCOOH gtHOHgtHC-=CHgtROH`D. `RCOOHgtHC-=CHgtHOH gtROH` |
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Answer» Correct Answer - B Order of acidic strength carbenylic acids gt `H_(2)O` gtalcohol (except`CH_(3)OH`) `HC-=CH` |
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| 93. |
The correct of increasing acidic strength is _____.A. PhenoltEthanolltChloroacetic acid ltAcetic acidB. Ethanol ltphenol ltChloroacetic acid ltAcetic acidC. EthanolltPhenolltAcetic acid ltChloroacetic acidD. Chloroacetic acid ltAcetic acid ltphenol lt Ethanol |
| Answer» Correct Answer - 3 | |
| 94. |
Give the acidic strength order for given compounds: A. `IIgtIIIgtIVgtI`B. `IIgtIVgtIIIgtI`C. `IIIgtIgtIIgtIV`D. `IVgtIIIgtIgtII` |
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Answer» Correct Answer - c Order of acidic nature |
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| 95. |
Compounds that give a brisk effervescence with sodium hydrogen carbonate areA. 2,4,6-tri nitrophenolB. phenolC. Benzoic acidD. Acetic acid |
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Answer» Correct Answer - A,C,D Due to less acidic nature of phenol |
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| 96. |
The reagent (s) which can transform A. `P_(2)O_(5)`B. `SOCl_(2)`C. `POCl_(3)`D. `PCl_(5)` |
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Answer» Correct Answer - A,B,C,D Dehydration of amide gives cyanide |
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| 97. |
An oxime (A) has two geometrical isomers when a mixture of both geometrical isomers is heated with conc. `H_(2)SO_(4)` them following two amides C and D are obtained `underset((70%))(Ph-NH-overset(O)overset(||)(C)-CH_(3))" "CH_(3)-underset((30%))overset(..)(N)H-overset(O)overset(||)(C)-Ph` Now, in the mixture, amount of which of the following geometrical isomers were more?A. B. C. Both isomers were in 1:1 ratioD. None of the above |
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Answer» Correct Answer - B Beckmann reaction. |
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| 98. |
Consider the reaction given below : `CH_(3)-CHDCONH_(2)+PhCOoverset(15)NH_(2)underset(Delta)overset(Br_(2)+OH^(-))to` The products obtained are :A. `CH_(3)CHDNH_(2)`B. `CH_(3)CHD-overset(15)NH_(2)`C. `PhNH_(2)`D. `Ph-overset(15)NH_(2)` |
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Answer» Correct Answer - A::D `CH_(3)-CHD-CONH_(2)-Ph-COoverset(15)NH_(2)overset(Br_(2)//OH^(-))tounderset(("Hoffmann bromamide test"))"Hoffmann degradation"toCH_(3)-CHD-NH_(2)+Phoverset(15)NH_(2)` |
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| 99. |
A compound having molecular formula `C_(5)H_(10)O_(5)` was reacted with excess of `CH_(3)COCl` to give a compound having molecular weight 318 gm. Predict the number of hydroxy groups present into the unknown compound. |
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Answer» Correct Answer - 4 In reaction Ist 6 moles are used. 2 moles are used for acid-base reaction. So, x=6 In 2nd reaction 3 moles are used y=3 In 3rd reaction 3 moles are used z=3 x+y+z=6+3+3 =12 |
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| 100. |
`CH_(3)CN+H_(2)Ooverset(H^(+))toA overset("Excess" Cl_(2))underset(Red P)toB`. In the above reaction A and B are respectivelyA. `CH_(3)CO OH,C Cl_(3)CO OH`B. `CH_(3)CH_(2)OH,CH_(3)CH_(2)Cl`C. `CH_(3)CHO,C Cl_(3)CHO`D. `CH_(3)CHOCH_(3),C Cl_(3)COCH_(3)` |
| Answer» Correct Answer - 1 | |