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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. |
If ethylene, carbon monoxide and water is heated at high temperature , which of the following is formedA. `C_4H_8O_2`B. `C_2H_5COOH`C. `CH_3COOH`D. `CH_2=CH-COOH` |
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Answer» Correct Answer - B `underset"Ethylene"(C_2H_4)+CO+H_2O overset"high temp"to underset"Propionic acid"(C_2H_5-COOH)` |
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| 52. |
Birch reduction is observed inA. `CH_(3)-CH=CH-CH_(3)`B. `HC -= CH`C. `H_(3)C-C-=CH`D. `H_(3)C-C-=C-CH_(3)` |
| Answer» Correct Answer - D | |
| 53. |
What is formed when calcium carbide react with heavy waterA. `C_2D_2`B. `CaD_2`C. `CaD_2O`D. `CD_2` |
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Answer» Correct Answer - A `underset"Calcium carbide"(CaC_2)+underset"heavy water"(2D_2O) to C_2D_2 + Ca(OD)_2` |
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| 54. |
`underset("Calcium carbide")(CaC_(2))overset(H_(2)O)(to)(A)overset("Red hot Cu tube")(to)(B)`, Product (B) of the reaction is:A. B. C. D. |
| Answer» Correct Answer - C | |
| 55. |
When acetylene is passed into dilute sulphuric acid containing `Hg^"2+"` ions, the product formed isA. AcetoneB. Acetic acidC. AcetaldehydeD. Formaldehyde |
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Answer» Correct Answer - C `CH-=CHunderset(1%HgSO_4)overset(40%H_2SO_4)to underset"Vinyl alcohol"(CH_2=CH-OH)overset"rearrangement"to underset"Acetaldehyde"(CH_3-CHO)` |
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| 56. |
When isobutyl bromide in dry ether is treated with absolute ethyl alcohol, the products formed areA. `CH_3-underset(CH_3)underset|CH-CH_2OH` and `CH_3CH_2MgBr`B. `CH_3-undersetunderset(CH_3)|CH-CH_2-CH_2-CH_3` and Mg(OH)BrC. `CH_3-underset(CH_3)underset(|)CH-CH_3` and `CH_3-CH_2OMgBr`D. `CH_3-undersetunderset(CH_3)|CH-CH_3, CH_2=CH_2` and Mg(OH)Br |
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Answer» Correct Answer - C `CH_3-undersetunderset(CH_3)(|)CH-CH_2-Mg-Br+C_2H_5OH to underset"Isobutane"(CH_3-undersetunderset(CH_3)(|)CH-CH_3)+underset"Ethoxy magnesium bromide"(C_2H_5OMgBr)` |
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| 57. |
In which of the following structures the pair of starred carbon atoms do not lie in the same plane?A. B. C. D. |
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Answer» Correct Answer - D An open chain alkane with molecular formula `C_(7)H_(16)` forms seven monochlorinated products (ignore stereoisomers) when heated with `Cl_(2).` Give the systematic name of this alkane. |
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| 58. |
Which is the correct structure of Sentene?A. B. C. D. |
| Answer» Correct Answer - C | |
| 59. |
Acetylene is prepared industrially by passing electric discharge through graphite electrodes in the atmosphere ofA. AirB. `N_2`C. `H_2`D. `CO_2` |
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Answer» Correct Answer - C `2C+H_2 overset"Electric arc"to CH-=CH` |
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| 60. |
`(E)-2-`chloro-2-butene when treated with alcoholic KOH gives which of the following as major productA. 2-butyneB. 1-butyneC. 1,2-butadieneD. 1,3-butadiene |
| Answer» Correct Answer - C | |
| 61. |
Acetylene givesA. White precipitate with `AgNO_3` and red precipitate with `Cu_2Cl`B. White precipitate with `Cu_2Cl_2` and red precipitate with `AgNO_3`C. White precipitate with both the reagentsD. Red precipitate with both the reagents |
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Answer» Correct Answer - A `CH-=CH+underset"(Ammonical)"(AgNO_3)to underset"White ppt."(Ag-C-=C-Ag)` `CH-=CH+underset"(Ammonical)"(CuCl_2)to underset"Red ppt."(Cu-C-=C-Cu)` |
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| 62. |
Silver acetylide when heated with HCl givesA. `C_2H_4`B. `H_2`C. `C_2H_4`D. None of these |
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Answer» Correct Answer - A `Ag-C-=C-Ag+2HCl to CH -= CH+2AgCl` |
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| 63. |
On cracking petrol, we getA. `CH_4`B. `C_3H_6`C. Both (a) and (b)D. `CH_3+CH_4+C_2H_6`+alcohols |
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Answer» Correct Answer - C On cracking petrol gives smaller hydrocarbons like `CH_4 , C_3H_6` |
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| 64. |
Which one of the following compounds gives methane on treatment with waterA. `Al_4C_3`B. `CaC_2`C. `VC`D. `SiC` |
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Answer» Correct Answer - A `Al_4C_3 + 12H_2O to 3CH_4 + 4Al(OH)_3` `CaC_2+2H_2O to C_2H_2 +Ca(OH)_2` |
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| 65. |
A mixture of propene and methane is obtained by the crackingA. 1-buteneB. 2-buteneC. butaneD. Isobutane |
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Answer» Correct Answer - C `underset"n-Butane"(CH_3CH_2CH_2CH_3)overset"Cracking"to CH_4+CH_3-CH=CH_2` |
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| 66. |
Methane can be prepared byA. Wurtz reactionB. DecarboxylationC. Hydrogenation reactionD. All of these |
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Answer» Correct Answer - B `CH_3COONa + NaOHoverset"CaO"to CH_4+Na_2CO_3` |
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| 67. |
Which of the following is not an endothermic reactionA. DehydrogenationB. Ethane to etheneC. Combustion of propaneD. Change of chlorine molecule into chlorine atoms |
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Answer» Correct Answer - C The enthalpy of combustion i.e., `DeltaH` is always negative . It means combustion is an exothermic reaction |
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| 68. |
Which of the following are produced from coaltarA. Synthetic dyesB. DrugsC. PerfumesD. All the three |
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Answer» Correct Answer - D Synthetic dyes, drugs , perfumes all are made from coal tar |
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| 69. |
Octane number can be changed byA. IsomerisationB. AlkylationC. CyclisationD. All of these |
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Answer» Correct Answer - D The octane number of fuel can be improved by increasing the percentage of branched chain alkanes, alkenes and aromatic hydrocarbon. Thus octane number can be changed by isomerisation (reforming), alkylation and aromatisation (cyclisation) etc. |
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| 70. |
Assertion :`CH_4` does not react with `Cl_2` in dark Reason:Chlorination of `CH_4` takes place in sunlightA. If both assertion and reason are true and the reason is the correct explanation of the assertionB. If both assertion and reason are true but reason is not the correct explanation of the assertionC. if assertion is true but reason is falseD. If the assertion and reason both are false |
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Answer» Correct Answer - B The assertion that chlorination of `CH_4` does not take place in dark is correct because it is a free radical reaction and free radicals are obtained in presence of sunlight. |
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| 71. |
`CH_4` is formed whenA. Sodium acetate is heated with sodalimeB. iodomethane is reducedC. Aluminium carbide reacts with waterD. All of these |
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Answer» Correct Answer - A `underset"Sod.acetate"(CH_3COONa)+NaOHoverset"CaO"to CH_4+Na_2CO_3` `underset"Iodomethane"(CH_3I)+2Hunderset"reduction"to CH_4+HI` `underset"Aluminium carbide"(Al_4C_3 + 6H_2O)to 3CH_4 + 2Al_2O_3` |
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| 72. |
Which one of these is NOT true for benzeneA. it forms only one type of monosbustituted productB. There are three carbon-carbon single bonds double bondsC. The heat of hydrogenation of benzene is less than the theoretical valueD. The bond angle between the carbon -carbon bonds is `120^@` |
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Answer» Correct Answer - B Resonance gives each C-C bond in benzene some double bond character and this has been confimed by measuring bond length between two adjacent carbon atom in various compounds of benzene . The bond length C-C (`sigma` bond as in ethane) is 1.54 Å and C=C (double bond as in ethene ) is 1.33 Å.The carbon to carbon bond length in benzene has been found to be 1.39 Å which lies between single and double bond length values |
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| 73. |
The reaction `CH_4+Cl_2 overset"uv light"to CH_3Cl+HCl` is an example ofA. Addition reactionsB. Substitution reactionC. Elimination reactionD. Rearrangement reaction |
| Answer» Correct Answer - B | |
| 74. |
Statement-1 : Rate of electrophilic addition on alkene `Higt HBr gt HCI gt HF.` Statement-2 : Order of nucleophilicity `I^(-) gt Br^(-) gt Cl^(-) gt F^(-).`A. Statement-1 is True, Statement-2 is True, Statement-2 is a correct explantion for Statement-1.B. Statement-1 is True, Statement-2 is True, Statement-2 in 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. |
| Answer» Correct Answer - B | |
| 75. |
The alkane that yields two isomeric monobromo derivatives isA. NeopentaneB. EthaneC. MethaneD. Propane |
| Answer» Correct Answer - D | |
| 76. |
Which of the following compounds does not dissolve in conc. `H_2SO_4` even on warmingA. EthyleneB. BenzeneC. HexaneD. Aniline |
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Answer» Correct Answer - C Hexane does not dissolve in conc. `H_2SO_4` |
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| 77. |
`Mg_(2)C_(3)overset(D_(2)O)(to)overset((i)BH_(3).THf)underset((ii)H_(2)O///overset(-)(O)H)(to)overset(H_(2)//Ni)(to)overset("conc".H_(3)PO_(4))(to)(S)` product(s) are:A. `Hunderset(D)underset(|)C=CH-CD_(3)`B. `H_(2)underset(D)underset(|)C-CH=CD_(2)`C. `H_(2)C=CH-CD_(3)`D. `H_(2)C-underset(D)underset(|)C=CH_(3)` |
| Answer» Correct Answer - A::B::C | |
| 78. |
Match the following columns : |
| Answer» Correct Answer - A::B::C | |
| 79. |
Match the following columns : |
| Answer» Correct Answer - A::B::C::D | |
| 80. |
Match the following columns : |
| Answer» Correct Answer - A::B::C::D | |
| 81. |
Which of the following compounds does not dissolve in conc. `H_(2)SO_(4)` even on warming `?`A. EthyleneB. BenzeneC. HexaneD. Aniline |
| Answer» Correct Answer - C | |
| 82. |
Match the following columns : |
| Answer» Correct Answer - A::B::C::D | |
| 83. |
`Ph-underset(O)underset(||)C-CH_(3)overset(A)(to)Ph-CH_(2)-CH_(3)` A could be :A. `NH_(2)NH_(2)," glycol "//OH^(-)`B. `Na(Hg)//" Conc. "HCl`C. `" Red "P//HI`D. `underset(SH)underset(|)(CH_(2))-underset(SH)underset(|)(CH_(2))," Raney "Ni-H_(2)` |
| Answer» Correct Answer - A::B::C::D | |
| 84. |
Two `C_(4)H_(6)` isomers give the same `C_(4)H_(8)O` product with `HgSO_(4)` and dil. `H_(2)SO_(4)`. However these isomers give different `C_(4)H_(6)Br_(4)` products with excess bromine. What are these isomeric hydrocarbons?A. Cyclobutene and 1-butyneB. 1,2-butandiene and 1,3-butadieneC. 2-butyne and cyclobuteneD. 2-butyne and 1-butyne |
| Answer» Correct Answer - D | |
| 85. |
`Aoverset(O_(3))underset(Me_(2)S)(to)H-overset(O)overset(||)C-CH_(2)CH_(2)-overset(O)overset(||)C-overset(O)overset(||)C-CH_(2)-CH_(2)-overset(O)overset(||)CH` A is one of the product .A can be:A. B. C. D. |
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Answer» Correct Answer - A::B::C::D Alkyne gives 1,2-dicarbonyl on the other hand alkene gives carbonyl compound by breaking double bond in reductive ozonolysis. |
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| 86. |
P is :A. B. C. D. |
| Answer» Correct Answer - A | |
| 87. |
How many moles of `O_(2)` required for complete combustion of two mole of butane?A. 10B. 13C. 11D. 6.5 |
| Answer» Correct Answer - B | |
| 88. |
On electrolysis gives :A. B. C. D. |
| Answer» Correct Answer - B | |
| 89. |
The correct order of rate of Wurtz reaction. A. `I gt II gt III gt IV`B. `II gt I gt III gtIV`C. `IV gt III gt II gt I`D. In all , rate of Wurtz reaction is same |
| Answer» Correct Answer - C | |
| 90. |
Give number of the products including stereoisomer formed in the following reaction:` A. 5B. 6C. 7D. 4 |
| Answer» Correct Answer - B | |
| 91. |
Select the given code of reagents for following conversion and write your answer as abcd. If reagent is used once then you need not to take it again. |
| Answer» Correct Answer - A::C::D | |
| 92. |
Which statement is incorrect about final major product (X)?A. It can not decolourise `Br_(2)` waterB. Ozonolysis of (X) can give two type of productsC. X gives same product on reaction with NBS and reaction of X with (i) (a) `BH_(3)`.THF,(b) `H_(2)O_(2)//OH^(-)` and then (ii) `P//Br_(2)`D. It can not form salt on reaction with `NaOH` |
| Answer» Correct Answer - C | |
| 93. |
Select incorrect option:A. `CH_(4) + "air" overset(Red hot)underset(Fe tube) (to) CH_(3)OH`B. `CH_(4)+"air"overset(MoO_(3))underset(Delta)(to) HCHO`C. `CH_(3)CH_(2)CH_(3)+"air" overset(Mn(OAc)_(2))underset(Delta)(to) CH_(3)CH_(2)COOH`D. `Me-underset(Me)underset(|)CH-Me overset(KMnO_(4))(to) Me-overset(O)overset(||)C-Me` |
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Answer» Correct Answer - D `Me_(3)C-OH` is formed. |
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| 94. |
Which of the following alkenes will react fastest with `H_(2)` under catalytic hydrogenation conditionsA. B. C. D. |
| Answer» Correct Answer - A | |
| 95. |
Which of the following conjugated diene would not react with a dienophile in a Diels-Alder reactions?A. B. C. D. |
| Answer» Correct Answer - A::D | |
| 96. |
`CH_3C-=C CH underset((ii)H_2O // Zn)overset((i)X)to CH_3-undersetunderset(O)(||)C-undersetunderset(O)(||)C-CH_3` X in the above reaction isA. `HNO_3`B. `O_2`C. `O_3`D. `KMnO_4` |
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Answer» Correct Answer - C `CH_3-C-=C-CH_3underset((ii)Zn//H_2O)overset((i)O_3)to CH_3-undersetunderset(O)(||)C-undersetunderset(O)(||)C-CH_3` |
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| 97. |
Compound (S) that on hydrogenation product (S) optically inactive compound (s) `"is" //"are"`A. B. C. D. |
| Answer» Correct Answer - A::B::C | |
| 98. |
Relation between (B) and (C) is:A. enantiomerB. diastereomerC. geometrical isomerD. meso |
| Answer» Correct Answer - B::C | |
| 99. |
The total number of carboxylic acid groups in te product P is: |
| Answer» Correct Answer - B | |
| 100. |
The treatment of `CH_3MgX` with `CH_3C-=C-H` producesA. `CH_3C-=C-CH_3`B. `CH_3-oversetoversetH|C=oversetoversetH|C-CH_3`C. `CH_4`D. `CH_3-CH=CH_2` |
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Answer» Correct Answer - C `CH_3-C-=overset(+delta)C-overset(+delta)H+overset(-delta)(CH_3)overset(+delta)(Mg)X to CH_4` |
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