InterviewSolution
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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. |
`10 mL` of a mixture of `CH_(4)` and `C_(3)H_(8)` requires `41 mL` of oxygen for complete combustion. What is the volume of `CH_(4)` and `C_(3)H_(8)` in. the mixture. |
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Answer» Suppose the volume `CH_(4)` in `(CH_(4)+C_(3)H_(8))` mix `=x c.c.` `=` Volume of `C_(3)H_(8)` will be `=10-x c.c.` For `CH_(4) CH_(4)+2O_(2)rarrCO_(2)+2H_(2)O` `because 1` vol. of `CH_(4)` requires `2` vol. of `O_(2)` for complete combustion `therefore x c.c.` of `C_(4), 2x c.c.` of `O_(2)` For `C_(3)H_(8) C_(3)H_(8)+5O_(2)rarr3CO_(2)+4H_(2)O` `because 1` volume of `C_(3)H_(8)` requires `5 ml` of `O_(2)` for complete combustion `therefore (10-x)c.c.` of `C_(3)H_(8)` requires `5(10-x)c.c.` of `O_(2)` Total volume of `O_(2)=2x+5(10-x)` it is equivalent to `41` (aC Cording to question) `because 2x+5(10-x)=41` `therefore x=3 c.c.` Volume of `CH_(4)` is `3c.c.` and volume of `C_(3)H_(8)` is `7 c.c.` |
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| 52. |
How many mole of oxygen is required for complete combustion of `1` mole of Alkenen. |
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Answer» Volume of hydrocarbon `=8c.c.`: Volume of `O_(2)=40c.c` Formula No. `1, (8)/(40)=(2)/(3n+)` (For alkane) `(1)/(5)=(2)/(3n+1)` or `3n+1=10` or `3n=10-1=9 , n=3` The value of `n` comes in whole number from `1st` formula it means hydrocarbon |
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| 53. |
Which of the following on treatment with aqueus sodium hydroxide will give corresponding alcohol and acid?A. `C_(6)H_(5)CHO`B. `CH_(3)CH_(2)CH_(2)CHO`C. `CH_(3)COCH_(3)`D. `C_(6)H_(5)CH_(2)CHO` |
| Answer» Correct Answer - A | |
| 54. |
The most suitable reagent for the conversion of `R- CH_(2) - OH rarr R-CHO` isA. `CrO_(3)`B. `PC C` (Pyridinium chlorochromate)C. `KMNO_(4)`D. `K_(2)Cr_(2)O_(7)` |
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Answer» Correct Answer - B `R-CH_(2)-OHoverset(PC C)rarrR-overset(O)overset(||)C-H` [Pyridinium chloro chromatic] PC C is milder oxidising agent, oxidises only into aldehyde. |
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| 55. |
The density of one hydrocarbon at `N.T.P` is `1.964g//`lite. Identify the hydrocarbon. |
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Answer» Molecular weight of Hydrocarbon `=` density of `1` lit. `xx22.4=1.964xx22.4=44` So molecular weight of hydrocarbon `=44` So the hydrocarbon is `C_(3)H_(8)` (Propane). |
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| 56. |
Select one from the following pair of isomer that has higher heat of combustion, justifying your choice.A. B. C. D. |
| Answer» Correct Answer - A::B::C::D | |
| 57. |
An alcohol, on treatment with `P+I_(2)` followed by the reaction of the formed product first with `AgNO_(2)` and the with `HNO_(2)` and final with `NOH`, it gives a blue colour. Which of the following alcohols can it be?A. `CH_(3)CH_(2)OH`B. `(CH_(3))_(2)CHOH`C. `(CH_(3))_(3)C-OH`D. |
| Answer» Correct Answer - B::D | |
| 58. |
The reagent(s) for the following conversion is/are:A. alcoholic `KOH`B. alcoholic `KOH` followed by `NaNH_(2)`C. aqueous `KOH` followed by `NaNH_(2)`D. `Zn//CH_(3)OH` |
| Answer» Correct Answer - B | |
| 59. |
A hydrocarbon `(A)` was found to have vapour density `36`. If forms only a single monochloro substitution product. Suggest `(A)`. |
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Answer» Correct Answer - Mol. Wt of alkane `=` Vapour density `xx2=36xx2=72` Alkane is `C_(n)H_(2n+2)` `therefore 12n+2n+2=72` `therefore n=5 therefore` Alknae is `C_(5)H_(12)` Thus alkane `C_(5)H_(12)` showing only one mono substitution product is `CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)C-CH_(3)overset(Cl_(2))rarrCH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)C-C_(2)Cl` (A) (2,2-`dimethylpropane) |
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| 60. |
A hydrocarbon which decolourises `KMnO_(4)` but does not give any precipitate with ammoniated `AgNO_(3)~A. BenzeneB. AcetyleneC. ButyneD. `2-`Butene |
| Answer» Correct Answer - D | |
| 61. |
The number of stereoisomers obtained by bromination of trans-2-butene is :A. 1B. 2C. 3D. 4 |
| Answer» Correct Answer - A | |
| 62. |
Which one of the following is reduced with `Zn-Hg//HCl` to give the corresponding hydrocarbonA. Butan-2-`oneB. Acetic acidC. AcetamideD. Ethyl acetate |
| Answer» Correct Answer - A | |
| 63. |
`1-`Butene may be converted to butane by reaction with -A. `pd//H_(2)`B. `Zn-HCl`C. `Sn-HCl`D. `Zn-Hg//HCl` |
| Answer» Correct Answer - A | |
| 64. |
On mixing certain alkane with chlorine and irradiating it with ultravilet light, it forms only one monochloroalkane. The alkane isA. neopentaneB. propaneC. pentaneD. isopentane |
| Answer» Correct Answer - A | |
| 65. |
`HCHO` and `CH_(3)-overset(O)overset(||)C-overset(O)overset(||)C-H` are the products obtained on ozonolysis of a monomer `(A)` of a polymer. (a) Give the structure of (A) (b) Draw the all "cls" form of a polymer of a monomer (A) |
| Answer» Correct Answer - a. `(A)rarrCH_(3)-underset(CH_(2))underset(||)C-CH=CH_(2)` | |
| 66. |
Synthetic polymer bakelite can be prepared from following compounds:-A. Styrene and vinyl chlorideB. Phenol and formaldehydeC. Acrylontile and vinyl chlorideD. Adipic acid and ethylene glycol |
| Answer» Correct Answer - B | |
| 67. |
Reagent used to convert allyl alcohol to acrolein is :A. `MnO_(2)`B. `KMnO_(4)`C. `O_(s)O_(4)`D. `H_(2)O_(2)` |
| Answer» Correct Answer - A | |
| 68. |
An unknown alcohol is treated with the Lucas reagent to determine whether the alcohol is primary, secondary or tertiary. Which alcohol reacts fastest by what mechanism ?A. secondary alcohol by SN1B. tertiary alcohol by SN1C. secondry alcohol by SN2D. tertiary alcohol by SN2 |
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Answer» Correct Answer - B Its `3^(@)` (Tertiary alcohol) which reacts fastest by `SN^(1)` mechanism. |
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| 69. |
Among the following compounds , which will react with acetone to give a product containing A. `C_(6)H_(5)NH_(2)`B. `(CH_(3))_(3)N`C. `C_(6)H_(5)NHC_(6)H_(5)`D. `C_(6)H_(5)NHNH_(2)` |
| Answer» Correct Answer - A | |
| 70. |
A compound (A) reacts with thionylchloride to give a compound (B). (B) reacts with magnesium to form a Grignard reagent which is treated with acetone and the product is hydrolysed to give 2-methyl butan-2-ol. What are the structural formulae of (A) and (B) ? |
| Answer» Correct Answer - `{:(C_(2)H_(5)OH,C_(2)H_(5)Cl),("Ethyl alcohol","Ethyl chloride"),(X,Y):}` | |
| 71. |
The enolic form of acetone containsA. 9 sigma bonds, 1 pi bond and 2 Ione pairsB. 8 sigma bonds, 2 pi bond and 2 Ione pairsC. 10 sigma bonds, 1 pi bond and 1 Ione pairsD. 9 sigma bonds, 2 pi bond and 1 Ione pairs |
| Answer» Correct Answer - A | |
| 72. |
The reaction of 1 mol each of p-hydroxyacetophenone and methyl magnesium iodide will give:A. B. C. D. |
| Answer» Correct Answer - A | |
| 73. |
What are the products expected in the following reactions? `C_(6)H_(5)-overset(O)overset(||)C-CH_(2)-overset(O)overset(||)C-CH_(3)underset("Ether")overset(CH_(2)N_(2))rarr`A. `C_(6)H_(5)overset(OCH_(3))overset(|)C=CH-overset(O)overset(||)C-CH_(3)`B. `C_(6)H_(5)overset(O)overset(||)C-CH=overset(OCH_(3))overset(|)C-CH_(3)`C. D. |
| Answer» Correct Answer - A::B | |
| 74. |
Which of the following oxidation reaction can be carried but with chromic acid in aqueous acetone `5-10^(@)C`A. `CH_(3)(CH_(2))_(3)C-=C-underset(OH)underset(|)CH-CH_(3)rarrCH_(3)(CH_(2))_(3)C-=C-overset(O)overset(||)C-CH_(3)`B. `CH_(3)(CH_(2))_(3)CH=CH-CH_(2)OHrarrCH_(3)(CH_(2))_(3)CH=CH-CHO`C. `C_(6)H_(5)CH_(3)rarrC_(6)H_(5)COOH`D. `CH_(3)(CH_(2))_(3)CH_(2)OHrarrCH_(3)(CH_(2))_(3)CHO` |
| Answer» Correct Answer - A,B,C,D | |
| 75. |
The final product (IV) in the sequence of reactions is: `underset(CH_(3))underset(|)CH_(3)CHOHoverset(PBr_(3))rarrIunderset("Ether")overset(Mg)rarrII` `IIIoverset(H_(2)O)rarrIV`A. `CH_(3)-underset(CH_(3))underset(|)CHOCH_(2)CH_(2)OH`B. `CH_(3)-underset(CH_(3))underset(|)CHCH_(2)CH_(2)Br`C. `CH_(3)-underset(CH_(3))underset(|)CH-CH_(2)CH_(2)OH`D. `CH_(3)-underset(CH_(3))underset(|)CHOCH_(2)CH_(3)` |
| Answer» Correct Answer - C | |
| 76. |
`2CH_(3)-underset(O)underset(||)(C)-CH_(3) underset(H^(+))overset(Mg//Hg)to` Product in the reaction isA. `H_(3)C-underset(OH)underset(|)overset(CH_(3))overset(|)C-underset(OH)underset(|)overset(CH_(3))overset(|)C-CH_(3)`B. `CH_(3)-underset(O)underset(||)C-O-underset(O)underset(||)C-CH_(3)`C. `CH_(3)-underset(OH)underset(|)CH-underset(OH)underset(|)CH-CH_(3)`D. None of these |
| Answer» `2CH_(3)-CO-CH_(3)underset(H_(2)O)overset(Mg//Hg)rarrH_(3)C-underset(OH)underset(|)overset(CH_(3))overset(|)C-CH_(3)` | |
| 77. |
Cis-2-Butene on reaction with `Br_(2)` in `CCI_(4)` producesmainly:A. `1-`bromo`-2-`buteneB. `2,3-`dibromobutaneC. meso`-2,3-`dibromobutaneD. ``(+-)2,3-`dibromobutane |
| Answer» Correct Answer - D | |
| 78. |
Which of the following will declourise alkaline `KMnO_(4)`solution ?A. `C_(3)H_(8)`B. `C_(2)H_(4)`C. `CH_(4)`D. `C Cl_(4)` |
| Answer» Correct Answer - B | |
| 79. |
In the reaction `CH_(3)CH_(2)CH=CH_(2)underset((2)NaBD_(4))overset((1)Hg(OAc)_(2),H_(2)O)rarr` the product obtained isA. `CH_(3)CH_(2)CHOHCH_(2)D`B. `CH_(3)CH_(2)CHDCH_(2)OH`C. `CH_(3)CH_(2)CD(OH)CH_(3)`D. `CH_(3)CH_(2)CD_(2)CH_(2)OH` |
| Answer» Correct Answer - A | |
| 80. |
The bond dissociation energies of the following `underset(I)(CH_(3)-H)` `underset(II)(CH_(3)CH_(2)-H)` `underset(III)(CH_(2)=CH-CH_(2)-H)` `underset(IV)(C_(6)H_(5)-H)` vary in the order :A. `IgtIIgtIIIgtIV`B. `IVgtIIIgtIIgtI`C. `IVgtIgtIIgtIII`D. `IIgtIgtIVgtIII` |
| Answer» Correct Answer - C | |
| 81. |
Cyanohydrin of the following compound on hydrolysis gives optically active product:A. HCHOB. `CH_(3)CHO`C. `CH_(3)COCH_(3)`D. All the above |
| Answer» Correct Answer - B | |
| 82. |
The minimum number of C atoms required to be present in an optically active alkene are: |
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Answer» `6C,[CH_(3)-CH_(2)-underset(CH_(3))underset(|)overset(H)overset(|)(C)-CH=CH_(2)]` `3-` Methyl `-1-` Pentene |
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| 83. |
The final product obtained in the reaction is : `OCH_(3)+Hbrrarr`A. B. C. D. None of these |
| Answer» Correct Answer - A | |
| 84. |
Which of the following acids have the lowest `pK_(a)` value :-A. `CH_(3)overset(Cl)overset(|)CH-COOH`B. `Cl-CH_(2)-CH_(2)-COOH`C. `C Cl_(3)COOH`D. `CHCl_(2)COOH` |
| Answer» Correct Answer - C | |
| 85. |
Considering the basic strength of amines in aqueous sloution which one has the smallest `pk_(b)` value .A. `(CH_(3))_(3)N`B. `C_(6)H_(5)NH_(2)` and `HCOOH` respectivelyC. `(CH_(3))_(2)NH`D. `CH_(3)NH_(2)` |
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Answer» Correct Answer - C Basicity order : `(CH_(3))_(2)NHgtCH_(3)NH_(2)gt(CH_(3))_(3)NgtC_(6)H_(5)NH_(2)` (in aq medium) `pK_(b)` order : `(CH_(3))_(2)NHltCH_(3)NH_(2)lt(CH_(3))_(3)NltC_(6)H_(5)NH_(2)` smallest `pK_(b): (CH_(3))_(2)NH` |
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| 86. |
After completion of the reactions (I and II) , the organic compound(s) in the reaction mixtures is(are) A. Reaction I: P and Reaction II: PB. Reaction I:U, acetone and Reaction II: Q acetoneC. Reaction I:T,U, acetone and Reaction II:PD. Reaction I: R, acetone and Reaction II: S aceton |
| Answer» Correct Answer - C::D | |
| 87. |
Indicate bonds which are cleaved I: In basic contions II: in acidic conditions |
| Answer» Correct Answer - I: bond b : II: bond a | |
| 88. |
Elimination of bromine from `2-`bromobutane results in the formation ofA. predominantly `2-`butaneB. equimolar mixture of `1` and `2-`buteneC. predominantly `2-`butyneD. predominantly `1-`butene |
| Answer» Correct Answer - A | |
| 89. |
Alcoholic solution of caustic potash is a specific reagent forA. DehydrationB. DehydrogenationC. Dehydro halogenationD. Dehalogenation |
| Answer» Correct Answer - C | |
| 90. |
What would be the produt formed when 1-bromo-3 chorocyclobutane reacts with two equivalents of metallic sodium in ether ? .A. B. C. D. |
| Answer» Correct Answer - C | |
| 91. |
`2-`Hexyne gives trans `-2-` hexene on treatment with `:`A. `H_(2)-pd-BaSO_(4)`B. `Li` in Liquid `NH_(3)`C. `H_(2)-PtO_(2)`D. `NaBH_(4)` |
| Answer» Correct Answer - B | |
| 92. |
`2-`Hexyne gives trans `-2-` hexene on treatment with `:`A. `Li AlH_(4)`B. `Pt//H_(2)`C. `Li//NH_(3)`D. `Pd//BaSO_(4)` |
| Answer» Correct Answer - C | |
| 93. |
Reimer-Tiemann reaction introduces an aldehyde group on to the aromatic ring of phenol, ortho to the hydroxyl group. This reacrtion involves electrophilic aromatic subsititution. It is a general method for the synthesis of subsituted salicyladehydes as depiced below: The structure of the intremediate (I) is:A. B. C. D. |
| Answer» Correct Answer - B | |
| 94. |
Which of the following characteristic does an aromatic compound exhibit :A. It should have `(4n+2) pi-`electrons in the ringB. It should be planer and conjugatedC. It should have `4n pi-`electons in the ringD. It should possess high resonance energy |
| Answer» Correct Answer - A::B::D | |
| 95. |
A third group is least likely to enter between two groups in the meta relationship. This is the result of steric hindrance and increases in importance with the size of the groups on the ring and with the size of the attacking species. When a Meat-directing group is meta to an ortho-para directing group, the incoming group primarily goes ortho th the meta directing group rather than para. `overset(E^(+))rarr......`?A. B. C. D. all of them |
| Answer» Correct Answer - D | |
| 96. |
A third group is least likely to enter between two groups in the meta relationship. This is the result of steric hindrance and increases in importance with the size of the groups on the ring and with the size of the attacking species. When a Meat-directing group is meta to an ortho-para directing group, the incoming group primarily goes ortho th the meta directing group rather than para. Chlorination of `m-`chloro nitro benzene gives :A. B. C. D. |
| Answer» Correct Answer - A | |
| 97. |
Which of the following groups are meta-directing :A. `-NH_(2)`B. `-OH`C. `-NO_(2)`D. `-CN` |
| Answer» Correct Answer - C::D | |
| 98. |
A third group is least likely to enter between two groups in the meta relationship. This is the result of steric hindrance and increases in importance with the size of the groups on the ring and with the size of the attacking species. When a Meat-directing group is meta to an ortho-para directing group, the incoming group primarily goes ortho th the meta directing group rather than para. A. B. C. |
| Answer» Correct Answer - C | |
| 99. |
Statement-I : `C_(6)H_(5)` is a meta-directing group. Because Statement-II : `-C_(2)H_(5)` is `a + l` group.A. Statement-I is True, Statement-II is True : Statement-II is a correct explanation for Statement-IB. Statement-I is True, Statement-II is True : Statement-II is `NOT` a correct explanation for Statement-IC. Statement-I is True, Statement-II is False.D. Statement-I is False, Statement-II is True. |
| Answer» Correct Answer - D | |
| 100. |
Statement-I: Benzoic acid on nitration will give m- nitrao benzoic acid. Because Statement-II: -COOH group will increase `e^(-)` density on meta position.A. Statement-I is True, Statement-II is True : Statement-II is a correct explanation for Statement-IB. Statement-I is True, Statement-II is True : Statement-II is `NOT` a correct explanation for Statement-IC. Statement-I is True, Statement-II is False.D. Statement-I is False, Statement-II is True. |
| Answer» Correct Answer - C | |