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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. |
Above reaction is an example of:A. EsterificationB. SaponificationC. HydrolysisD. Trans Esterification |
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Answer» Correct Answer - D Ester convert into another ester `:.` It is trans esterification. |
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| 52. |
Identify the product (A).A. B. C. D. `Ph-overset(O)overset(||)C-NH_(2)` |
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Answer» Correct Answer - B Nitrogen is more nucleophile than oxygen atom |
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| 53. |
`CO+NaOHto`A. `HCOONa`B. `C_(2)H_(2)O_(4)`C. `HCOOH`D. `CH_(3)COOH` |
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Answer» Correct Answer - A `CO+NaOH overset(Delta)toHCOONa` |
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| 54. |
The carboxylic acid of least acidic strength among the following is:-A. p-nitrobenzoic acidB. p-methylbenzoic acidC. p-chlorobenzoic acidD. p-methoxybenzoic acid |
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Answer» Correct Answer - D Electron donating groups decrease acid strength of benzoic acid and electron withdrawing groups increase acidic strenth. Order of +I effect is `-OM e gt -Me,` so, p-methoxy benzoic acid is weaker acid than p-methylbenzoic acid. |
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| 55. |
The name of the compound having the structure `ClCH_(2)CH_(2)COOH` isA. 3-chloropropanoic acidB. 2-chloropropanoic acidC. 2-chloroethanoic acidD. Chlorosuccinic acid |
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Answer» Correct Answer - A `underset("3-chloro propanoic acid")(Cl-underset(3)(C)H_(2)-underset(2)(C)H_(2)-underset(1)(C)OOH)` |
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| 56. |
The most acidic of the following isA. `ClCH_(2)COOH`B. `C_(6)H_(5)COOH`C. `CD_(3)COOH`D. `CH_(3)CH_(2)COOH` |
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Answer» Correct Answer - A Any electron withdrawing substituent (having-I-effect) stabilises the anion by dispersing the negative charge ad therefore, increases the acidity. Chlorine is an electron withdrawing group. |
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| 57. |
Which one of the following statement is trueA. Saponification of oil yields a diolB. Drying of oil involves hydrolysisC. Addition of antioxidation to oil minimizes rancidityD. Refining of oil involves hydrogenation |
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Answer» Correct Answer - C Upon sanification oils yields soaps. Dryig of oil involves oxidation, polymerisation, colloidal gel formation but not hydrolysis. Refining of oils does not involve hydrogenation. The substances which can prevent the occurrence of oxidation rancidity are known as antioxidants. |
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| 58. |
, The product isA. B. C. D. |
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Answer» Correct Answer - C In presence of `Ba(OH)_(2)` when heated phthalic acid undergoes decarboxylation. |
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| 59. |
Colouration of `Br_(2)//C Cl_(4)` will be discharged byA. Cinnamic acidB. Benzoic acidC. o-phthalic acidD. Acetophenone |
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Answer» Correct Answer - A Cinnamic acid reacts with bromine in carbon tetrachloride to give dibromocinnamic acid. `C_(6)H_(5)CH=CHCOOH+Br_(2) overset(C Cl_(4))to underset("Dibromocinnamic acid")(C_(6)H_(5)-overset(Br)overset(|)(CH)-overset(Br)overset(|)(C)HCOOH)` |
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| 60. |
Arrange the following in order of increasing reactivity (least `rarr` most) towards nucleophile `{:(CH_(3)overset(O)overset(||)(C)Ounderset(1)(CH_2)CH_(3),underset(2)(CH_(3)overset(O)overset(||)(C)Cl),underset(3)(CH_(3)overset(O)overset(||)(C)NHCH_(3))):}`A. `1 lt 2 lt 3`B. `3 lt 1 lt 2`C. `1 lt 3 lt 2`D. `2 lt 1 lt 3` |
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Answer» Correct Answer - B Leaving group tendency `(-CI gt -OEt gt -NH -CH_(3))` |
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| 61. |
When benzoic acid is treated with `PCl_(5)` at `100^(@)C`, it givesA. Benzoyl chlorideB. o-chlorobenzoic acidC. p-chlorobenzoic acidD. Benzyl chloride |
| Answer» Correct Answer - A | |
| 62. |
Which one of the following produce acyl halide by treatment with `PCl_(5)` ?A. AcidB. AlcoholC. AmideD. Ester |
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Answer» Correct Answer - A `underset("Acid")(CH_(3)COOH)+PCl_(5) to underset("Acid chloride")(CH_(3)COCl)+POCl_(3)+HCl` |
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| 63. |
Saturated fatty acids are represented by which of the forumulaA. `C_(n)H_(n)O_(2)`B. `C_(n)H_(3n)O_(2)`C. `C_(n)H_(2n+1)`D. `C_(n)H_(2n)O_(2)` |
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Answer» Correct Answer - D The monocarboxylic acids are called fatty acids, because some of the higher members were obtained from fats. The general formula is `C_(n)H_(2n+1)COOH` or RCOOH or `C_(n)H_(2n)O_(2)`. |
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| 64. |
Sodium or potassium salts of higher fatty acids are calledA. SoapsB. TerpenesC. SugarsD. Alkaloids |
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Answer» Correct Answer - A Soaps are the sodium or potassium salts of higher fatty acids. |
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| 65. |
which of the following is not a fatty acid?A. Stearic acidB. Palmitic acidC. Oleic acidD. Phenyl acetic acid |
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Answer» Correct Answer - D Except phenyl acetica cid rest all acids are fatty acids. |
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| 66. |
Fats and oils are mixture ofA. Glycerides and saturated fatty acidsB. Glycerides and unsaturated fatty acidsC. Glycerides of saturated and unsaturated fatty acidsD. Only saturated and unsaturated fatty acids |
| Answer» Correct Answer - C | |
| 67. |
Fats and oils areA. AcidsB. AlcoholsC. EstersD. Hydrocarbons |
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Answer» Correct Answer - C Fats and oil are jointly known as lipid which are the ester of glycerol with high fatty acids. |
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| 68. |
Which is not a glyceride:A. FatB. OilC. PhospholipidD. Soaps |
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Answer» Correct Answer - D Soaps are sodium or potassium salt of fatty acids e.g.-`c_(17)H_(35)COONa` sodium strerate. |
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| 69. |
Which of the following esters cannot undergo Claisen self-condensationA. `CH_(3)-CH_(2)-CH_(2)-CH_(2)-COOC_(2)H_(5)`B. `C_(6)H_(5)COOC_(2)H_(5)`C. `C_(6)H_(5)CH_(2)COOC_(2)H_(5)`D. `C_(6)H_(11)CH_(2)COOC_(2)H_(5)` |
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Answer» Correct Answer - B Because it does not have `alpha`-hydrogen atom. |
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| 70. |
Statement 1: Aceto acetic ester `(CH_(3)COCH_(2)COOC_(2)H_(5))` contains `CH_(3)CO` gp. But does not give Iodoform test. Statement 2: The H-atoms of the `CH_(3)` gp. Are more acidic than those of `CH_(2) ` gp.A. Statement 1 is true, statement 2 is true, statement 2 is a correct explanation for statement 1B. 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 falseD. Statement 1 is false, statement 2 is true |
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Answer» Correct Answer - C The H-atoms of the `CH_(2)` group are more acidic than those. |
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| 71. |
Hydrogenation of benzoyl chloride in the presence of `Pd//BaSO_4` gives :A. benzyl alcoholB. benzaldehydeC. benzoic acidD. phenol |
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Answer» Correct Answer - B |
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| 72. |
When propionic acid is treated with aqueous sodium bicarbonate, `CO_(2)` is liberated. The carbon of `CO_(2)` comes fromA. methyl groupB. carboxylic acid groupC. methylene groupD. bicarbonate group |
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Answer» Correct Answer - D |
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| 73. |
When propionic acid is treated with aqueous sodium bicarbonate, `CO_(2)` is liberated. The carbon of `CO_(2)` comes fromA. Methyl groupB. Carboxylic acid groupC. Methylene groupD. Bicarbonate |
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Answer» Correct Answer - D `C_(2)H_(5)COOH+NaHCO_(3)toC_(2)H_(5)COONa+H_(2)O+CO_(2)` |
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| 74. |
The boiling point of propionic acid is more than that of n-butyl alcohol, an alcohol of comparable molecular weight. |
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Answer» Correct Answer - F |
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| 75. |
Ethylester `underset("excess")overset(CH_(3)CH_(2)MgBr)toP`. The product P will beA. B. C. D. |
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Answer» Correct Answer - A |
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| 76. |
Benzamide on treatment with `POCl_3` gives :A. anilineB. benzonitrileC. chlorobenzeneD. benzyl amine |
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Answer» Correct Answer - B |
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| 77. |
The acidity of carboxylic acid is determined by the nature of the alkyl group attached and the substiuent present on it. It is affected mainly by the inductive effect of the substituent and its position with respect to the -COOH group. Electron-donating substituent tends to decrease the acidic strength whereas electron-withdrawing substituent tends to increase acidic strength. The acidic strength of aromatic carboxylic acid on the other hand depends upon both the inductive and resonance effects of the substituents. Which of the following would be expected to be most highly ionized in water ?A. `ClCH_(2)CH_(2)CH_(2)COOH`B. `CH_(3)CHClCH_(2)COOH`C. `CH_(3)CH_(2)C Cl_(2)COOH`D. `CH_(3)CH_(2)CHClCOOH` |
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Answer» Correct Answer - C Due to -I effect of Cl. |
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| 78. |
Assertion: Fluoroacetic acid is stronger acid than bromoacetic acid. Reason: Acidity depends upon the electron withdrawing effect of the fluorine and chlorine.A. If both assertion and reason are true and the reason is the correct explanation of the assertion.B. If both assertion and reason are true but reason is not the correct explanation of the assertionC. If assertion is true but reason is false.D. If the assertioin and reason both are false. |
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Answer» Correct Answer - A The larger the electron withdrawing inductive effect the greater is the acidity. |
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| 79. |
Assertion: Electron withdrawing groups decrease the acidity of carboxylic acids. Reason: Substituents affect the stability of the conjugate base and acidity of carboxylic acids.A. If both assertion and reason are true and the reason is the correct explanation of the assertion.B. If both assertion and reason are true but reason is not the correct explanation of the assertionC. If assertion is true but reason is false.D. If assertion is false but reason is true. |
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Answer» Correct Answer - D electron withdrawing groups increase the acidity of carboxylic acids by stabilising the conjugate base through delocalisation of the negative charge by inductive and resonance effect. |
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| 80. |
Which of the following reaction will produce isopropyl acetate in the best tield?A. Acetylchloride `+2-"propanol" rarr`B. Silver acetate `+2- "chloropropane" rarr`C. Acetic acid `+2- "propanol"//H_(2)SO_(4)rarr`D. 3-methylbutanone `+ C_(6)H_(5)CO_(3)H harr` |
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Answer» Correct Answer - A |
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| 81. |
A carboxylic acid X is treated with bromine(1 mole) in the presence of a little phosphouus. The isolated product is heated with a strong base and then oxidized with `O_(3)//Zn-H_(2)O.` one of the two oxidation products is a netural compound which reacts with hydroxylamine to give an oxime, X can beA. `CH_(3)CH_(2)CH(CH_(3))CH_(2)CO_(2)H`B. `CH_(3)CH_(2)CH(CH_(3))CO_(2)H`C. `CH_(3)CH_(2)CO_(2)H`D. `(CH_(3))CHCH_(2)CO_(2)H` |
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Answer» Correct Answer - A |
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| 82. |
Rearrangement of an oxime to an amide in the presence of strong acid is calledA. Curtius rearrangementB. Fries rearrangementC. Beckmann rearrangementD. Sandmeyer reaction |
| Answer» Correct Answer - C | |
| 83. |
Which of the following order is wrong with respect to property indicated?A. Formic acidgtacetic acidgt propanoic acid (acid strength)B. Fluroacetic acidgtchloroacetic acidgtbromoacetic acid (acid strength)C. Benzoic acid gt phenol gt cyclohexanol (acid strength)D. Anilinegtcyclohexylaminegtbenzamide (basic strength) |
| Answer» Correct Answer - D | |
| 84. |
Products obtained in the given reactions are shown below. The number of possible products for x and y are:A. 1,1B. 1,2C. 2,1D. 2,2 |
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Answer» Correct Answer - C Cis on heating give diastereomer while trans on heating give one product. |
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| 85. |
The reaction of compounf P with `CH_(3)MgBr` (excess) in `(C_(2)H_(5)_(2)O` followed by addition of `H_(2)O` give Q the compound Q on treatment with `H_(2)SO_(4)`at `0^(@)` C gives R. the reaaction of R with `CH_(3) COCl` in the presence of anhydrous `AlCl_(3)"in" CH_(2)Cl_(2)` followed by treatment with `H_(2)O` produces compound S. [Et in compound P is ethyl group] The product S is The product S is A. B. C. D. |
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Answer» Correct Answer - A |
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| 86. |
The above shown polymer is obtained when a carbonic compound is allowed to stand. It is a white solid. The polmer isA. TrioxaneB. FormoseC. ParaformaldehydeD. Metaldehyde |
| Answer» Correct Answer - A | |
| 87. |
The correct order of decreasing acid strength of trichloroacetic acid (A), trifluoroacetic acid (B), acetic acid (C), and formic acid (D) isA. BgtAgtDgtCB. BgtDgtCgtAC. AgtBgtCgtDD. AgtCgtBgtD |
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Answer» Correct Answer - A `CF_(3)-COOH gt C Cl_(3)-underset((K_(a)" order"))(COOH gt HCOOH) gt CH_(3)COOH` |
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| 88. |
Acetic acid does not undergo haloform reaction. Acetic acid has no alpha-hydrogen.A. Statement I is true, Statement II is true,Statement Iim is a correct examplation of Statement I.B. Statement I is true, Statement II is true, Statement II is not the correct explanation of Statement I.C. Statement I is true, Statement II jis false.D. Statement I is false, Statement II is true. |
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Answer» Correct Answer - C |
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| 89. |
Vinegar obtained from cane sugar containsA. Citric acidB. Lactic acidC. Acetic acidD. Palmitic acid |
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Answer» Correct Answer - C Vinegar contains `8-10%` acetic acid. |
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| 90. |
Which reaction is not possible for acetic anhydride?A. `(CH_(3)overset(O)overset(||)C)_(2)O+2HN(CH_(3))_(2)rarr CH_(3)overset(O)overset(||)(C)N(CH_(3))_(2)+CH_(3)CO_(3)^(-) +H_(2)overset(+)(N)(CH_(3))_(2)`B. `(CH_(3)overset(O)overset(||)C)_(2)O +CH_(3)CH_(2)OH rarr CH_(3)overset(O)overset(||)(C)OCH_(2)CH_(3)+CH_(3)CO_(2)H`C. `(CH_(3)overset(O)overset(||)C)_(2)O +C_(6)H_(6) overset(AICI_(3))rarr CH_(3)overset(O)overset(||)(C)CI +CH_(3)CO_(2)H`D. `(CH_(3)overset(O)overset(||)C)_(2)O +NaCI rarr CH_(3)overset(O)overset(||)(C)CI +CH_(3)CO_(2)^(-)Na^(+)` |
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Answer» Correct Answer - D Weak base cannot replace strong base. `(CI^(Theta) lt CH_(3)COO^(Theta) lt C_(2)H_(5)O^(Theta) lt NH_(2)^(Theta) rArr` Basicity order) |
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| 91. |
In quick vinegar process of acetic acid, the temperature of mixture isA. 300 KB. 427 KC. 500 KD. 350 K |
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Answer» Correct Answer - A `2CH_(3)CH_(2)OH+O_(2) underset(300K)overset("Acetobacter")tounderset(8-10%" acetiacid (vinegar)")(CH_(3)COOH+H_(2)O)` |
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| 92. |
Fischer esterification of phenylacetic acid with 1- propanol gave a mixture of `93%` of the ester, propyl phenylacetate, contaminated with `7%` unreacted acid. Which of the following treatments would be best used to purify the ester?A. Reduce the unwanted acid with `LiAlH_(4)` in etherB. Wash an ether solution of the crude product with concentrated brine (aq.NaCl)C. Wash an ether solution of the crude product with `5%` aqueous sulphuric acidD. Wash an ether solution of the crude product with `5%` aqueous sodium acrbonate |
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Answer» Correct Answer - A |
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| 93. |
The reaction of acetamide with water is an example ofA. AlcoholysisB. HydrolysisC. AmmonolysisD. Saponification |
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Answer» Correct Answer - B Thee reaction of acetamide with water is an example of hydrolysis. |
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| 94. |
Acetamide is:A. Highly acidicB. Highly basicC. NeutralD. Amphoteric |
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Answer» Correct Answer - D In amides, lone pair of electrons of N-atom remain delocalized (in resonance) with C=O group, hence amides are not much basic and show amphoteric character. |
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| 95. |
What makes a lemon sourA. Tartaric acidB. Oxalic acidC. Citric acidD. Hydrochloric acid |
| Answer» Correct Answer - C | |
| 96. |
In the preparation of an ester, the commonly used dehydrating agent isA. Phosphorus pentaoxideB. Anhydrous calcium carbideC. Anhydrous aluminium chlorideD. Concentrated sulphuric acid |
| Answer» Correct Answer - D | |
| 97. |
Ester and acetamide are distinguished byA. Hydrolysis with strong acids or alkaliB. Derivatives of fatty acidsC. Both (a) and (b)D. None of these |
| Answer» Correct Answer - C | |
| 98. |
When a mixture of potassium cyanate and ammonium chloride is heated, it givesA. `N_(2)O`B. `NH_(3)`C. `CH_(3)NH_(2)`D. `H_(2)NCONH_(2)` |
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Answer» Correct Answer - D `underset("ammonium chloride")(2NH_(4)Cl)+underset("Potassium Cyanate")(KCNO)toNH_(2)-underset(Urea)(CO)-NH_(2)+KCl` |
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| 99. |
Oxalic acid may be distinguished from tartaric acid byA. Sodium bicarbonate solutionB. Ammoniacal silver nitrate solutionC. Litmus paperD. Phenolphthalein |
| Answer» Correct Answer - B | |
| 100. |
Propionic acid with `Br_(2)`/`P` yields a dibromo product. Its structure would beA. `CH_(2)Br-CHBr-COOH`B. `H-underset(Br)underset(|)overset(Br)overset(|)(C)-CH_(2)COOH`C. `CH_(2)Br-CH_(2)-COBr`D. `CH_(3)-underset(Br)underset(|)overset(Br)overset(|)(C)-COOH` |
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Answer» Correct Answer - D `alpha`-hydrogen is substituted by bromine. |
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