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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. |
some statement regarding the reaction: are given below. Select the correct statement(s).A. P is a trans alkeneB. `Q_(1)` is a pure compound and optically inactive due to internalC. In the P to `Q_(1)` conversion step and `Br_(2)` adds on P in a sy manner and the intermediate formed is a cyclic brominium ion.D. `Q_2` is a binary mixture and is optically inactive. |
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Answer» Correct Answer - A::D |
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| 52. |
The IUPAC name of `CH_3CHC-=CH` isA. 3-butyn-2-ylB. 1-methylprop-2-ynylC. but-3-ynylD. but-2-ynyl |
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Answer» Correct Answer - B `CH_(3)underset(|)overset(1)(C)Hoverset(2)(C)-=overset(3)(C)H` |
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| 53. |
Which gases are poisonous?A. LewisiteB. Mustard gasC. PhosgeneD. MIC |
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Answer» Correct Answer - A::B::C::D |
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| 54. |
`CH_(3)-C-=C-CH_(3)overset("Cold " KMnO_(4))(to)(A)` Product (A) is :A. `CH_(3)-CH_(2)-CO-CHO`B. `CH_(3)-CO-CO-CH_(3)`C. `CH_(3)-CH(OH)-CH(OH)-CH_(3)`D. `O=CH-CH_(2)-CH_(2)CH=O` |
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Answer» Correct Answer - B |
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| 55. |
In which reaction last production is `Ph-C-=CH`?A. `C_(6)H_(5)-CBr_(2)-CH_(3)underset("Mineral oil, Heat")overset(3NaNH_(2))tooverset(NH_(4)Cl)to`B. `C_(6)H_(5)CH=CH_(2)underset(C Cl_(4))overset(Br_(2))tounderset("Mineral Oil, Heat")overset(3NaNH_(2))tooverset(NH_(4)Cl)to`C. `C_(6)H_(5)-CO-CH_(3)overset(PCl_(5))tounderset("Mineral oil, heat")overset(3NaNH_(2))tooverset(NH_(4)Cl)to`D. All |
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Answer» Correct Answer - D |
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| 56. |
The hydrolysis of `Mg_(2)C_(3)` producesA. AcetyleneB. PropyneC. ButyneD. Ethylene |
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Answer» Correct Answer - B |
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| 57. |
The reduction of 4-octyne with `H_(2)` in the presence of `Pd//BaSO_(4)` quinoline gives givesA. Trans-4-octeneB. cis-4-octeneC. A mixture of cis and trans-4-octeneD. A completely reduced product `C_(6)H_(18)` |
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Answer» Correct Answer - B |
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| 58. |
`underset((A))(C_(4)H_(6))underset(Pd//BaSO_(4))overset(H_(2))tounderset((B))(C_(4)H_(8))overset(O_(3),H_(2)O)to2CH_(3)COOH` which of the following does not represent compound A & B correctlyA. `CH_(3)-C-=C-CH_(3),CH_(3)-CH=CH-CH_(3)`B. `CH_(2)=CH-CH=CH_(2),CH_(3)-CH=CH-CH_(3)`C. `CH_(3)-CH_(2)-C-=CH,CH_(3)-CH_(2)-CH=CH_(2)`D. |
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Answer» Correct Answer - B::C::D |
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| 59. |
Compound X will beA. B. C. D. |
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Answer» Correct Answer - A |
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| 60. |
In the following sequence of reactions, products (A) to (H) are formed: The gases (B), (C), and (D), respectively, are:A. B is `CH-=CH,C` is `CO_(2),D` is `H_(2)`B. `B` is `CH-=CH,` is `H_(2),D` is `CO_(2)`C. D. |
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Answer» Correct Answer - C |
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| 61. |
In the following sequence of reactions products (A) to (H) are formed. Q. Compound G isA. B. C. D. |
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Answer» Correct Answer - A |
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| 62. |
In the following sequence of reactions products (A) to (H) are formed. Q. Compound F isA. `C_(2)H_(6)`B. `CH_(3)-C-=CH`C. D. |
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Answer» Correct Answer - D |
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| 63. |
In the following sequence of reactions, the products (A) to (G) are formed: i. `2CH_4(g)overset(Delta)underset(1773K)rarr(A)(g)+B(g)` ii. `4 mol of (A) overset(Delta)underset(Ni(CN)_4+THF)rarr(C)overset(O_3//o x id.)rarr(D) only` iii. `(A)overset((1) 1 mol of NaNH_2)underset((2) C_2H_5I)rarr(E)underset(Red hot tube)overset(3 mol of E)rarrunderset((G) only)underset(darr O_3//Red.)F` Compounds (A) and (B), respectively, are:A. Ethane and `O_(2)`B. Ethene and `H_(2)`C. Ethyne and `O_(2)`D. Ethyne and `H_(2)` |
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Answer» Correct Answer - D |
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| 64. |
In the following sequence of reactions the products A to G are formed: (i). `2CH_(4)(g)underset(1773K)overset(Delta)toA(g)+B(g)` (ii). 4 moles of `Aunderset(Ni(CN)_(4)+THF)overset(Delta)tooverset(O_(3)//"oxidation")toD` only (iii). `Aunderset(C_(2)H_(3)I)overset("1 mole of "NaNH_(2))toEunderset("Red hot tube")overset(3" mole of E")toFoverset(O_(3)//"reductive")toG` only Q. Compound C is:A. benzeneB. MesityleneC. Cycloocta-1,3,5j-trieneD. Cycloocta-1,3,5,7-tetraene |
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Answer» Correct Answer - D |
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| 65. |
Match the following |
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Answer» Correct Answer - A::B::C::D |
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| 66. |
Match the following |
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Answer» Correct Answer - A::B::C::D |
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| 67. |
In the following sequence of reactions the products A to G are formed: (i). `2CH_(4)(g)underset(1773K)overset(Delta)toA(g)+B(g)` (ii). 4 moles of `Aunderset(Ni(CN)_(4)+THF)overset(Delta)tooverset(O_(3)//"oxidation")toD` only (iii). `Aunderset(C_(2)H_(3)I)overset("1 mole of "NaNH_(2))toEunderset("Red hot tube")overset(3" mole of E")toFoverset(O_(3)//"reductive")toG` only Q. Compound G isA. 2-oxobutanalB. 2-oxobutanoic acidC. methyl glyoxalD. 2-oxopropanoic acid |
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Answer» Correct Answer - A |
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| 68. |
Match the following reaction in column-I with their products in column-II |
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Answer» Correct Answer - A::B::C::D |
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| 69. |
Which of the following is correct?A. Alkynes are more reactive than alkenes toward catalytic hydrogenation.B. the hydrohenation of alkynes is more exothermic than the hydrogentation of alkenesC. both alkynes and alkenes are equally reactive toward catalytic hydrogentationl.D. both (1) and (2) |
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Answer» Correct Answer - D Alkenes are adsorbed on the surface of the catalyst only when the plane of the `pi` bond approaches head on (perpendicularly). Because of the cylindrical nature of the `pi` bonds of alkynes, any approach along the axis of the cylinder is successful. These less constrained transition states cause alkynes to have more positive `DeltaS` values. Consequently, alkynes react faster than alkenes. |
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| 70. |
Match the column . |
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Answer» Correct Answer - A::B::C::D |
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| 71. |
Match each of the following compound in column-I with the characteristic reaction in column-II |
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Answer» Correct Answer - A::B::C::D |
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| 72. |
Match the column |
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Answer» Correct Answer - A::B::C::D |
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| 73. |
Mathc the column |
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Answer» Correct Answer - A::B::C::D |
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| 74. |
The molecule havi linear structure isA. MethaneB. EthyleneC. AcetyleneD. Water |
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Answer» Correct Answer - C |
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| 75. |
Q. The molecule `C_(3)H_(4)O_(3)` is sequential reaction isA. `HO-CH=CH-COOH`B. `CH_(2)=underset(OH)underset(|)(C)-COOH`C. `CH_(2)=underset(O)underset(||)(C)-underset(O)underset(||)(C)-OH`D. `H-underset(O)underset(||)(C)-CH_(2)-underset(O)underset(||)(C)-OH` |
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Answer» Correct Answer - D |
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| 76. |
Q. In the sequential reaction, if instead of `CO_(2),(CH_(3))_(3)C-Br` is used. Product will beA. `HC-=HC`B. `(CH_(3))_(3)CH`C. `HC-=C-C(CH_(3))_(3)`D. `BrCH=CH-C(CH_(3))_(3)` |
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Answer» Correct Answer - A |
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| 77. |
From the given sets, mathc appropriately |
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Answer» Correct Answer - A::B::C::D |
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| 78. |
Which of the following compounds will produce butanone when treated with `H_(2)SO_(4) , HgSO_(4)` and water?A. `CH_(3)-CH_(2)-CH=CH_(2)`B. C. `CH_(3)-CH_(2)-CH_(2)-C-=N`D. |
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Answer» Correct Answer - B |
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| 79. |
Which of the following can give nucleophilic addition on alkyneA. `Cl_(2)`B. `HBr`C. `HCl`D. `H_(2)O //HgSO_(4)//H_(2)SO_(4)` |
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Answer» Correct Answer - D |
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| 80. |
Give the reactivity in the decreasing order of the following nucleophiles towards nucleophilic addition reaction with compound `A(F_3C--=-CF_3)`. (I) `CH_3O^(Θ)` (II) `C_3H_5^(Θ)` (III) `CH_3COO` (IV) `CH_3SO_3^(Θ)`A. (a) `(II)gt(I)gt(III)gt(IV)`B. (b) `(IV)gt(III)gt(I)gt(II)`C. (c) `(I)gt(II)gt(IV)gt(III)`D. (d) `(III)gt(IV)gt(II)gt(I)` |
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Answer» Correct Answer - A In the same nucleophilic centre, nuleophilicity is parallel to basic character. Stronger the acid, weaker is the conjugated base. Acidic character order: `CH_(3)SO_(3)H gt CH_(3) COOH gt CH_(3)OH gt C_(2)H_(5)OH` Basic and nucleophilicity order: `underset((IV))(CH_(3)Soverset(Theta)(O_(3)))lt underset((III))(CH_(3)COoverset(Theta)O) lt underset((I))(CH_(3)overset(Theta)O)lt underset((II))(C_(2)H_(5)overset(Theta)O)` |
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| 81. |
Which of the following is redox reaction?A. 1-Butyne `underset(BaSO_(4))overset(Pd//C-H_(2))to`B. 2-Butyne `overset(NaNH_(2))to`C. 1-Butyne `overset(Alc.KOH)to`D. `HC-=CH underset("Copper tube")overset("red hot")to` |
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Answer» Correct Answer - A |
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| 82. |
Number of collinear carbons in 2,4-hexa diyneA. 3B. 2C. 6D. 4 |
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Answer» Correct Answer - C |
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| 83. |
How many moles of sodamide are required to synthesize and alkyne from the following compound? `CH_2CH_2CHBrCH_2Br`A. One moleB. Two molesC. Four molesD. Three moles |
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Answer» Correct Answer - D Vic-dihalides undergo double dehydrohalogenationn requiring two moles of `NaNH_2`. The terminal alkyne is converted to the alkynyl anion as soon as it is formed. Thus three moles of the base are used in the overall reaction. |
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| 84. |
How many moles of methane are produced on reaction with `CH_(3)MgBr` |
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Answer» Correct Answer - 3 |
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| 85. |
When methane gas is heated at `1500^(@)C` for a very short time in open atmosphere( fraction of a second), it formsA. methaneB. ethaneC. etheneD. benzene |
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Answer» Correct Answer - A `2CH_4overset(1500^@)toC_2H_2+2H_2` |
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| 86. |
Which of the following hydrocarbons are most polar in nature?A. AlkanesB. AlkenesC. AlkynesD. All are non-polar |
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Answer» Correct Answer - C They are all basically ninpolar but alkynes are relatively more polar on account of more polarzation of their `pi`-electrons. Thus, alkynes are slightly more soluble in water than alkenes and alkanes. For example but-1-yne has a larger dipole moment (0.80 D) than but-1-ene (0.30 D) because the C with more s character is more electronegative. Thus, a carbon-carbon bond involving sp hybrid C of but-1-yne is more polarized than a carbon-carbon bond involving `sp^2` hybrid C of but-1-ene. |
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| 87. |
Which of the following hydrocarbons should be choosen as a starting material to prepare 3- hexanone by the hydration?A. B. C. D. |
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Answer» Correct Answer - D |
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| 88. |
Which of the following hydrocarbons has the lowest dipole moment?A. B. `CH_(3)C-=C CH_(3)`C. `CH_(3)CH_(2)-=CH`D. `CH_(2)=CH-C-=CH` |
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Answer» Correct Answer - B |
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| 89. |
Which of the following hydrocarbons will reacts with `NaNH_2` to form a sodium salt?A. BenzeneB. EthaneC. EtheneD. Acetylene |
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Answer» Correct Answer - A Acidic hydrogen atom is present only in acetylene. Thus, `HC-=CH+NaCH_2toCH-=C^(-)Na^(+)NH_3` |
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| 90. |
Lime is heated with ____ at `2000^@` the product is treated with water to liberate ethyne.A. charcoalB. cokeC. graphiteD. diamond |
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Answer» Correct Answer - B `CaO +3Coverset(2000^@C)toCaC_2CO` `CaC_2+2H_2OtoHC-=CH+Ca(OH)_2` |
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| 91. |
`Xunderset((2)H_(2)O //H^(+))overset((1)O_(3))toCH_(3)-CH_(2)-COOH^(+)` `HOOC-CH_(2)-CH_(2)-COOH+HCOOH`A. `CH_(3)-CH_(2)-C-=C-(CH_(2))_(2)-C-=CH`B. `CH_(3)-C-=C-(CH_(2))_(3)-C-=CH`C. `CH_(3)-CH_(2)-C-=C-CH_(2)-C-=CH`D. `HC-=-(CH_(2))_(4)-C-=CH` |
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Answer» Correct Answer - A |
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| 92. |
Which of the following statements best explain the greater acidity of terminal alkynes `(RC-=CH)` compared with monosubstituted alkenes `(RCH=CH_(2))`?A. The sp-hybridized carbon atoms of the alkynes are less electronegative than the `sp^(2)` carbons of the alkene.B. The two `pi` bonds of the alkyne are better able to stabilize th negative charge of the anion by resonance.C. The sp-hybridized carbons of the alkyne are more electronegative than the `sp^2` carbon of the alkene.D. The question is incorrect-alkenes are more acidic than alkynes. |
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Answer» Correct Answer - C |
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| 93. |
Which would produce chiral molecule after treatment with Lindlar catalst?A. B. C. D. |
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Answer» Correct Answer - B |
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| 94. |
`CH_(3)CH_(2)CH_(2)-overset(O)overset(||)(C)-H+CH_(3)-C-=CH overset(Na,NH_(3)(l))to`A. B. C. D. |
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Answer» Correct Answer - A |
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| 95. |
How is the following transformation best carried out? .A. `OsO_(4),NaHSO_(3)`B. `H_(2)SO_(4)//H_(2)O`C. `HgSO_(4)//H_(2)SO_(4)`D. `HIO_(4)` |
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Answer» Correct Answer - C |
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| 96. |
Major product.A. B. C. D. None of these |
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Answer» Correct Answer - B |
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| 97. |
The Products of the following I and II sequences are related as: A. DiastereomersB. identicalC. enantiomersD. heometrical isomers. |
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Answer» Correct Answer - B |
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| 98. |
Which of the following molecules possess `sp,sp^2` and `sp^3` hybridized C atoms?A. but-2-yneB. buta-1,3-dieneC. buta-1,2-dieneD. propadiene |
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Answer» Correct Answer - C `underset((1))(overset(sp^(3))(CH_3)overset(sp)(C)-=overset(sp)(C)overset(sp^(3))(CH_3))` `underset((2))(overset(sp^(2))(CH_2)=overset(sp^(2))(CH)-overset(sp^(2))CH=overset(sp^(2))(CH_2))` `underset((3))(overset(sp^(2))(CH_2)=overset(sp)(CH)=overset(sp^(2))(CH)-overset(sp^(3))(CH_3))` `underset((4))(overset(sp^(2))(CH_2)=overset(sp)(C)=overset(sp^(2))(CH_2))` |
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| 99. |
`CH_3C-=CH+Cu+CuClunderset(O_2.CH_3OH)overset(NH_3)to` identify the product.A. `CH_3CH=CH-CH=CHCH_3`B. `CH_3C-=C Cu`C. `CH_3C-=C-C-=C CH_3`D. `CH_3CH=CH-C-=C CH_3` |
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Answer» Correct Answer - C Cuprous acetylides undergo oxidative coupling when heated in organic solvent in the presence of air: `CH_3C-=CHunderset(NH_3)overset(CuCl)toCH_3C-=CC u` `2CH_3C-=C C uoverset(O_2)toCH_2C-=C-C-=C CH_3` |
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| 100. |
Addition of water to acetylene compound is catalysed by……………….and………………… |
| Answer» Aqueous `H_2SO_4` and `HgSO_4`. | |