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.
| 101. |
Which of the following reactions will yield 2,2-dibromopropaneA. `HC-=CH+2HBr to`B. `CH_3C-=CH+2HBr to`C. `CH_3CH=CH_2+HBr to`D. `CH_3CH=CHBr + HBr to` |
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Answer» Correct Answer - B `CH_3C-=CH+2HBr to CH_3-underset(Br)underset(|)oversetoverset(Br)(|)C-CH_3` |
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| 102. |
`2-`Hexyne gives trans `-2-` hexene on treatment with `:`A. `H_(2)//Pd//BaSO_(4)`B. `H_(2)PtO_(2)`C. `NaBH_(4)`D. `Li-NH_(3)//C_(2)H_(5)OH` |
| Answer» Correct Answer - D | |
| 103. |
Olefins can be hydrogenated byA. Zinc and HClB. Nascent hydrogenC. Raney Ni and `H_2`D. Lithium hydride in ether |
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Answer» Correct Answer - C `underset"Ethene"(CH_2)=CH_2+H_2underset(300^@)overset(Ni)to underset"Ethane"(CH_3-CH_3)` |
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| 104. |
Daily use candles (paraffin wax) containA. Higher saturated hydrocarbonB. Lower saturated hydrocarbonC. Higher unsaturated hydrocarbonD. Lower unsaturated hydrocarbon |
| Answer» Correct Answer - A | |
| 105. |
At room temperature solid paraffin isA. `C_3H_8`B. `C_8H_18`C. `C_4H_10`D. `C_20H_42` |
| Answer» Correct Answer - D | |
| 106. |
`CH_2=CH_2overset(Br_2//H_2O)to A`, In the above reaction the compound A isA. Ethylene bromohydrinB. 1,2-dibromo ethaneC. EthanolD. None of these |
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Answer» Correct Answer - A `CH_2=CH_2overset(Br_2,H_2O)tounderset"Ethylene bromohydr in"(undersetunderset"Br""|"(CH_2)-underset"OH"underset|CH_2)` Hence compound A is Ethylene bromohydrin |
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| 107. |
Which decolourize aqueous bromine and gives white fumes of HCl on reaction with `PCl_5`A. `CH_3COCH_2CH=CH_2`B. `CH_3CH_2CH_2CH_2CH_3`C. `CH_3CH=CHCH_2CH_2OH`D. `CH_3OCH_2CH_2CH_2CH_2OH` |
| Answer» Correct Answer - C | |
| 108. |
`CH-=Chunderset(H_2SO_4)overset(H_2O // Hg^(2+))to X overset(LiAIH_4)to Y overset(P_4//Br_2)to Z` Here Z isA. Ethylene bromideB. EthanolC. Ethyl bromideD. Ethylidene bromide |
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Answer» Correct Answer - C `CH-=CHunderset(H_2SO_4)overset(H_2O //Hg^(2+))tounderset"(X)"(H_3C-oversetoversetO(||)C-H)overset(LiAlH_4)to underset"(Y)"(CH_3-CH_2-OH)overset(P_4//Br_2)to underset"(z)"(C_2H_5Br)` |
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| 109. |
Identify the product D in the following series of reaction `CH_3COOH overset(LiAIH_4)to A underset"443 K"overset(H^+)to B overset(Br_2)to C underset"KOH"overset"alc."to D`A. MethaneB. AlcoholC. AcetyleneD. Benzaldehyde |
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Answer» Correct Answer - C `CH_3-COOH overset(LiAlH_4)to CH_3-CH_2-Ohunderset"443 K"overset(H^+)to CH_2=CH_2 overset(Br_2)to undersetunderset(Br)(|)CH_2-undersetunderset(Br)(|)CH_2underset"KOH"overset"alc."to underset"Acetylene"(CH-=CH)+2KBr + 2H_2O` |
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| 110. |
Which of the following is not formed by the ozonolysis of (o-xylene)A. GlyoxalB. Ethyl glyoxalC. Dimethyl glyoxalD. Methyl glyoxal |
| Answer» Correct Answer - B | |
| 111. |
In the following reactions Compound X isA. B. C. D. |
| Answer» Correct Answer - C | |
| 112. |
Indicate the organic structure for the product expected when 2-methyl propene is heated with acetyl chloride in presence of anhydrous zinc chlorideA. `CH_3-underset(Cl)underset|overset(CH_3)overset|C-CH_2-CO-CH_3`B. `CH_3-undersetunderset(CH_3)|oversetoverset(H)|C-CH_2-CO-CH_3`C. D. `CH_3-oversetoverset(O)(||)C-oversetoverset(CH_3)|C=CH_2` |
| Answer» Correct Answer - A | |
| 113. |
Addition of bromine to trans-2-butene yields meso-2,3-dibromobutane. Bromine addition is an electrophilic addition.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. |
| Answer» Correct Answer - B | |
| 114. |
The reaction of propene with HOCl proceeds via the addition of :A. `H^(+)` in the first stepB. `Cl^(+)` in the first stepC. `OH^(-)` in the first stepD. `Cl^(+)` and `OH^(-)` in a single step |
| Answer» Correct Answer - B | |
| 115. |
Assertion: Addition of `Br_(2)` to `1`-butane gives two optical isomers. Reason: The product contains one asymmetric carbon atoms.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. |
| Answer» Correct Answer - A | |
| 116. |
The intermediate formed during the addition of HCl to propene in the presence of a peroxide isA. `CH_(3)overset(+)(C)HCH_(2) Cl`B. `CH_(3)overset(.)(C)HCH_(2)Cl`C. `CH_(3)CH_(2)CH_(3)`D. `CH_(3)CH_(2)overset(+)(C)H_(2)` |
| Answer» Correct Answer - B | |
| 117. |
Statement-I: Statement-II:Birch reduction is anti addition.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. |
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Answer» Correct Answer - D `"Me"-C-=overset(Theta)(C)Na^(+) " is product. "` |
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| 118. |
Which of the following group activates the benzene ring most towards electrophilic substitutionA. `-CHO`B. `-NR_2`C. `-NHCOCH_3`D. `-NO_2` |
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Answer» Correct Answer - B `-NR_2` is a `+R` group |
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| 119. |
Some meta-directing substituents in aromatic substitution are given. Which one is most deactivatingA. `-NO_2`B. `-C-=N`C. `-SO_3H`D. `-COOH` |
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Answer» Correct Answer - A Deactivating power `-NO_2 gt -C-= N gt -SO_3 H gt COOH` |
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| 120. |
Assertion:Knocking lowers the efficiency of the engine Reason:Fuel with minimum knocking property is preferredA. 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 Knocking involves the production of metallic sound due to irregular burning of the fuel . This irregular burning lowers the efficiency of the engine |
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| 121. |
Decreasing order of C-C bond length is (I)`C_2H_6` (II)`C_2H_2` (III)`C_6H_6` (IV)`C_2H_6`A. IV gt III gt I gt IIB. I gt II gtIV gt IIIC. II gt I gt IV gt IIID. IV gt I gt III gt II |
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Answer» Correct Answer - A Bond length `prop 1/"Bond order"` Bond order =`"Bonding -antibonding electron"/2` Bond order is highest for `C_2H_6` so it has minimum bond strength |
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| 122. |
Select correct option (s) :A. Alkene is easier to ozonolyse than alkyne.B. Alkyne is more reactive than alkene towards electrophilic addition.C. Alkyne give electrophilic as well as nucleophilic addition with suitable reagents.D. Alkene is more reactive than alkyne towards catayte hydrogenation. |
| Answer» Correct Answer - A::C | |
| 123. |
Plane polarized light is passed from the container after these reaction are completed. Select correct option:A. No optical rotation is observed in container P as well as container Q.B. Opticall rotation is observed in container P only.C. Optical rotation is observed in container Q only.D. Optical rotation is observed in both the containers. |
| Answer» Correct Answer - A | |
| 124. |
Assertion:Neopentane forms only one monosubstituted compound. Reason:Neopentane has high bond energyA. 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 - C Neopentane has four identical methyl groups attached on `4^@` carbon atom and thus only one product is possible during monosubstitution |
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| 125. |
Structural formula for lewisite isA. `underset(underset(CHAsCl_(3))(||))(CHCl)`B. `underset(underset(CHAsCl)(||))(CHCl)`C. `underset(underset(CHAsCl_(2))(||))(CHCl)`D. `underset(underset(CHAsCl_(2))(||))(CH_(2))` |
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Answer» Correct Answer - 3 Lewisite is obtained when acetylene reacts with arsenic chloride `CH equiv CHoverset(AsCl_(3))rarrunderset("Lewisite")(CHCl=CHAsCl_(2))` |
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| 126. |
Which of the following does not give alkaneA. Reaction of `CH_3I` with Na in etherB. Reaction of sodium acetate with sodalimeC. Electrolysis of concentrated sodium acetate solutionD. Reaction of ethyl chloride with alc. KOH |
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Answer» Correct Answer - D `CH_3-CH_2-Cl+underset"(alc.)""KOH"to underset"Ethene"(CH_2=CH_2)+KCl+H_2O` In presence of alc. KOH dehydrohalogenation occur and alkene is formed |
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| 127. |
LPG is a mixture ofA. `C_6H_12+C_6H_6`B. `C_4H_10+C_3H_8`C. `C_2H_4+C_2H_2`D. `C_2H_4+CH_4` |
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Answer» Correct Answer - B Liquefied petroleum gas is a mixture of ethane, propane and butane. The main component is butane. |
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| 128. |
In which case butane is formedA. `2C_2H_5-Cl+Na`B. `C_2H_5COOH+Na_2CO_3`C. `CH_2=CH-CH_3+H_2SO_4`D. None of these |
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Answer» Correct Answer - A `C_2H_5Cl+2Na+Cl C_2H_5 to underset"butane"(C_2H_5-C_2H_5)+2NaCl` This is called Wurtz reaction . `C_2H_5COOH+Na_2CO_3 to underset"sodium propanoate"(2C_2H_5COONa)+CO_2+H_2O` `CH_3-CH=CH_2+H^(+) HSO_4^(-)to underset"isopropyl hydrogen sulphate"(CH_3-undersetunderset(HSO_4)(|)(CH)-CH_3)` |
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| 129. |
`C_2H_5I overset"[H]"to A`. A isA. EthaneB. ButaneC. MethaneD. Methyl iodide |
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Answer» Correct Answer - A `C_2H_5I+2[H]underset"HCl"overset"Zn"to underset"ethane"(C_2H_6)+HI` |
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| 130. |
Which of the following represents the most oxidized form of hydrocarbonA. `CO_2`B. RCHOC. RCOOHD. RCOOOH |
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Answer» Correct Answer - A Hydrocarbons one complete oxidation produced `CO_2` and water `CH_3-CH_3+3 1/2O_2 to 2CO_2 + 3H_2O` |
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| 131. |
Name the reaction `C_10H_22overset"900 K"to C_4H_8+C_6H_14`A. AlkylationB. CrackingC. PyrolysisD. Fractionation |
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Answer» Correct Answer - B `underset"Decane"(C_10H_22)underset"cracking"overset"900 K"to underset"Butene"(C_4H_8)+ underset"Hexane"(C_6H_14)` |
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| 132. |
What is the molecular formula of the alkane, the 5.6 litre of which weight 11 g at STPA. `C_6H_14`B. `C_4H_10`C. `C_3H_8`D. `C_2H_6` |
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Answer» Correct Answer - C Molecular mass can be obtained by the victor mayer process. Molecular mass =`"Weight"/"V ml."xx22400=11/5600xx22400`=44 |
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| 133. |
Which of the following alkane cannot be prepared by Wurtz synthesis?A. `CH_4`B. `C_2H_6`C. `C_3H_8`D. `C_4H_10` |
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Answer» Correct Answer - A It is not possible to prepare `CH_4` by Wurtz reaction |
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| 134. |
Condition for maximum yield of `C_2H_5Cl` isA. `C_2H_6"(excess)"+Cl_2overset"UV light"to `B. `C_2H_6+Cl_2 underset"Room temp."overset"dark"to`C. `C_2H_6+Cl_2 "(excess)"overset"UV light"to`D. `C_2H_6+Cl_2 overset"UV light"to` |
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Answer» Correct Answer - A `C_2H_6"(excess)"+Cl_2overset"U.V. light"to underset"(major product )"underset"Ethyl chloride"(C_2H_5Cl)+HCl` |
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| 135. |
n-propyl bromide on treatment with ethanolic potassium hydroxide producesA. PropaneB. PropeneC. PropyneD. Propanol |
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Answer» Correct Answer - B `underset"n-Propyl bromide"(CH_3-CH_2-CH_2-Br)+KOHoverset(C_2H_5OH)tounderset"Propene"(CH_3-CH=CH_2+KBr+H_2O)` |
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| 136. |
The number of structural and configurational isomers of a bromo compound, `C_5H_9Br`, formed by the addition of HBr to 2-pentyne respectivelyA. 1 and 2B. 2 and 4C. 4 and 2D. 2 and 1 |
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Answer» Correct Answer - B `underset"pentyne-2"(CH_3-C-=C-CH_2-CH_3+HBr)to CH_3-CH=overset(Br)overset|C-CH_2-CH_2` (This compound shows 2 structural and four configurational isomers ) |
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| 137. |
The compound which has one isopropyl group isA. 2,2,3,3-tetramethyl pentaneB. 2,2 dimethyl pentaneC. 2,2,3-trimethyl pentaneD. 2-methyl pentane |
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Answer» Correct Answer - D `CH_3-underset(CH_3)underset(|)CH-underset"2-methyl pentane"(CH_2-CH_2-CH_3)` |
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| 138. |
Which statement is not true concerning alkanesA. Large number alkanes are soluble in waterB. All alkanes have a lower density than waterC. At room temperature some alkanes are liquids, some solids and some gasesD. All alkanes burn |
| Answer» Correct Answer - A | |
| 139. |
Fischer Tropsch process is used for the manufacture ofA. Synthetic petrolB. Thermosetting plasticsC. EthanolD. Benzene |
| Answer» Correct Answer - A | |
| 140. |
In the following reaction A and B, respectively are `Aoverset"HBr"to C_2H_5BroversetB to A`A. `C_2H_4, alc. KOH//Delta`B. `C_2H_5Cl, aq KOH//Delta`C. `CH_3OH, aq. KOH//Delta`D. `C_2H_2, PBr_3` |
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Answer» Correct Answer - A `C_2H_4 overset"HBr"to C_2H_5Br undersetDeltaoverset"alc.KOH"to C_2H_4` |
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| 141. |
When 2-bromobutane reacts with alcoholic KOH, the reaction is calledA. HalogenationB. HydrogenationC. ChlorinationD. Dehydro-halogenation |
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Answer» Correct Answer - D `CH_3-undersetunderset(Br)(|)CH-CH_2-CH_3overset"alc.KOH"to underset"2-butene"(CH_3CH=CHCH_3)` The reaction is dehydrohalogenation |
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| 142. |
The gas with the highest heat of combustion is `:`A. MethaneB. EthaneC. EthyleneD. Acetylene |
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Answer» Correct Answer - 2 Ethane has the highest heat of combustion. `{:(CH_(4)+2O_(2)rarrCO_(2)+2H_(2)O,,DeltaH=-890.4KJ mol e^(-1)),(2C_(2)H_(6)+7O_(2)rarr4CO_(2)+6H_(2)O,,DeltaH=-3131.52KJ mol e^(-1)),(C_(2)H_(4)+3O_(2)rarr2CO_(2)+2H_(2)O,,DeltaH=-1411.4KJ mol e^(-1)),(2C_(2)H_(2)+5O_(2)rarr4CO_(2)+2H_(2)O,,DeltaH=-900.2KJmol e^(-1)):}` |
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| 143. |
Select correct statement (s) :A. Only one`1^(@)` monochloro product is obtained.B. `4,3^(@)`monochloro products are obtained.C. 7 fractions are obtained on fractional distillation.D. `8,2^(@)` monochloro products are obtained. |
| Answer» Correct Answer - B::C::D | |
| 144. |
Select correct statement (s) about monochloroination of methycyclohexane:A. Total 10 monochloro products are obtained.B. Total 8 fractions are obtained on fractional distillation of all monochloro derivatives obtained.C. Out of all monochloro products only 3 are capable of showing geometrical isomerism.D. Out of all monochloro products 4 are chiral. |
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Answer» Correct Answer - B::D Total 12 obtained, 6 can show G.I. |
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| 145. |
Major product of which reaction will give red ppt. With `Cu_(2)Cl_(2)+NH_(4)OH` ?A. `Mg_(2)C_(3) overset(H_(2)O)(to)`B. `CHCl_(3)overset(Ag)underset(Delta)(to)`C. Sodium maleate`overset("Electrolysis")(to)`D. `Me -C-=C-Meoverset((i)NaNH_(2).Delta)underset((2)H_(2)O)(to)` |
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Answer» Correct Answer - A::B::C::D Terminal alkyne give red ppt. with `CH_(2)Cl_(2) + NH_(2)OH.` products are: `(a) HC-=CH` `(b) HC-=CH` `(c) HC-=CH` `(d) MeCH_(2)C-=CH` |
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| 146. |
Hydrocarbon can be prepared by :A. Frankland reactionB. Buvault Blanc reactionC. Mozingo reactionD. Buvault Blanc reaction |
| Answer» Correct Answer - A::C | |
| 147. |
Decaline can be prepared by :A. B. C. D. |
| Answer» Correct Answer - B | |
| 148. |
How many chiral compounds are possible on monochlorination of 2-methyl butaneA. 8B. 2C. 6D. 4 |
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Answer» Correct Answer - C `underset"(R+S)"(oversetoverset(Cl)(|)CH_2-undersetunderset(CH_3)(|)overset**CH-CH_2-CH_3), underset"(R+S)"(CH_3-undersetunderset(CH_3)(|)CH-underset**oversetoverset(Cl)(|)CH-CH_3)` Four monochloro derivatives are chiral |
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| 149. |
The compound that decolourises alkaline `KMnO_(4)` is :-A. `C_(6)H_(6)` (Benzene)B. `C_(6)H_(12)`C. `C_(6)H_(14)`D. `C Cl_(4)` |
| Answer» Correct Answer - B | |
| 150. |
The species which acts as electrophile in the bromination of benzene is `:`A. `Br_(2)`B. `Br^(-)`C. `Br^(+)`D. `Br^(**)` |
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Answer» Correct Answer - 3 In the bromination of benzene `:Br^(+)` is the electophile. |
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