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.
| 251. |
The number of secondary hydrocarbons in 2,2-dimethyl butane isA. 8B. 6C. 4D. 2 |
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Answer» Correct Answer - D `underset"2,2-dimethyl butane"(H_3C-undersetunderset(H)(|)oversetoversetH|C-undersetunderset(CH_3)(|)oversetoverset(CH_3)(|)C-CH_3)` |
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| 252. |
What are hydrocarbons? |
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Answer» Compounds of hydrogen and carbon. |
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| 253. |
In its reaction with silver nitrate acetylene showsA. oxidising propertyB. Reducing propertyC. Basic propertyD. Acidic property |
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Answer» Correct Answer - D Acidic property because H atoms are replaced by Silver metal atoms |
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| 254. |
Using anhydrous `AlCl_3` as catalyst, which one of the following reaction produces ethylbenzene (PhEt)A. `H_2C=CH_2+C_6H_6`B. `H_3C-CH_3+C_6H_6`C. `H_3C-CH_2OH+C_6H_6`D. `CH_3-CH=CH_2+C_6H_6` |
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Answer» Correct Answer - A `C_6H_6+H_2C=CH_2underset(95^@"pressure")overset(AlCl_3, HI)to C_6H_5CH_2CH_3` |
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| 255. |
Reaction of one molecule of HBr with one molecule of 1,3-butadiene at `40^@` C gives predominantlyA. 3-bromobutane under kinetically controlled conditionsB. 1-bromo-2-butene under thermodynamically controlled conditionsC. 3-bromobutane under thermodynamically controlled conditionsD. 1-bromo-2-butene under kinetically controlled conditions |
| Answer» Correct Answer - B | |
| 256. |
Statement-1 : `Cl_(2)` reacts with islobutane in hv to produce `3^(@)` butyl chloride as major product. Statement-2 : `3^(@)` free radical is more stable than `1^(@)` free radical.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 `1^(@)` product is major product. |
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| 257. |
How many types of hydrocarbons will form by radical combination in following reaction? `Me-X+Et-X+underset(1-"Halo propane")(Pr-Xoverset(Na//ether)(to))` |
| Answer» `Me-X+MeEt+Me-Pr+Et-Pr+Pr-Pr=5` | |
| 258. |
`overset(14)(C)H_(2)=CH-CH_(3)overset(NBS)underset(C Cl_(4),Delta)(to)overset(Na)underset("Dry ether",Delta)(to)"Products".` Products can be :A. `CH_(2)=CH-overset(14)(C)H_(2)-CH_(2)-CH=overset(14)(C)H_(2)`B. `CH_(2)=CH-CH_(2)-CH_(2)-CH=CH_(2)`C. `CH_(2)=CH-overset(14)(C)H_(2)-overset(14)(C)H_(2)-CH=CH_(2)`D. `overset(14)(C)H_(2)=CH-CH_(2)-CH_(2)-CH=overset(14)(C)H_(2)` |
| Answer» Correct Answer - A::C::D | |
| 259. |
How many allylic mono brominated products will be formed when NBS is treated with the given compound. `.^(14)CH_(2)= CH-CH_(3)` |
| Answer» Correct Answer - B | |
| 260. |
(i) Cis-2-butene`overset(Br_(2))underset(C Cl_(4))(to)` (ii) Trans-cyclo octene`overset(Br_(2))underset(C Cl_(4))(to)` (a) Number of organic products obtained in X. ltbr. (b) Number of organic products obtained in Y. (C) Number of possible stereoisomer of product of X. (d) Number of possible stereoisomer of product of Y. |
| Answer» Correct Answer - A::B::C | |
| 261. |
The number of optically active products obtained from the complete ozonolysis of the given compound is : |
| Answer» Correct Answer - A | |
| 262. |
Which will undergo reaction with ammonical `AgNO_3`A. B. `CH_3-CH=CH-C-=CH`C. `CH_3-CH_2-CH=CH-CH_2-CH_3`D. `CH_2=CH-CH_2-CH_3` |
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Answer» Correct Answer - B `CH_3-CH=CH-C-=C-H`. Acidic hydrogen (H atom attached to triple bond ) is present therefore it gives reaction with ammonical `AgNO_3` |
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| 263. |
Major Product is :A. B. C. D. |
| Answer» Correct Answer - D | |
| 264. |
Major Project is :A. B. C. D. |
| Answer» Correct Answer - D | |
| 265. |
The purest form of coal isA. PeatB. AnthraciteC. BituminousD. Lignite |
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Answer» Correct Answer - B The purest form of coal is anthracite, because it has highest percentage of carbon |
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| 266. |
Reaction of benzene with `Me_3COCl` in the presence of anhydrous `AlCl_3` givesA. B. C. D. |
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Answer» Correct Answer - B It is because of rearrangement during which initially formed acyl cation loses CO to form stable tertiary butyl cation |
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| 267. |
Identify a reagent from the following list which can easily distinguish between 1-butyne and 2-butyne.A. bromine, `C Cl_(4)`B. `H_(2)` Lindlar catalystC. dilute `H_(2)SO_(4), HgSO_(4)`D. ammoniacal `Cu_(2)Cl_(2)` solution |
| Answer» Correct Answer - D | |
| 268. |
Predict the product C obtained in the following reaction of butyne-1 `CH_3CH_2-C-=CH+HCl to B overset"HI"to C`A. `CH_3-undersetunderset(Cl)|CH-CH_2CH_2I`B. `CH_3-CH_2-CH_2-undersetunderset(Cl)|oversetoversetI|C-H`C. `CH_3-CH_2-oversetoversetI|CH-CH_2Cl`D. `CH_3CH_2-undersetunderset(Cl)|oversetoversetI|C-CH_3` |
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Answer» Correct Answer - D `CH_3CH_2-C-=CH+overset(o+)HCl to CH_3-CH_2 -undersetunderset(cl)(|)C=CH_2 oversetoverset(o+)(HI)to CH_3-CH_2-undersetunderset(Cl)(|)oversetoverset(I)(|)C-CH_3` |
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| 269. |
Benzene can be obtained by heating either benzoic acid with X or phenol with Y.X and Y are respectivelyA. Zinc dust and soda limeB. Soda lime and zinc dustC. Zinc dust and sodium hydoxideD. Soda lime and copper |
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Answer» Correct Answer - B `C_6H_5COOH+underset"(x)""NaOH"to C_6H_5COONa +H_2O overset"NaOH"to C_6H_6+Na_2CO_3` `C_6H_5OH+underset"(y)""Zn"overset"distill"to C_6H_6+ZnO` |
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| 270. |
How many of the following compound will decolourise bromine water? |
| Answer» Correct Answer - D | |
| 271. |
Which of the following does not decolourise bromine solution in carbon disulphideA. AcetyleneB. PropeneC. EthaneD. Propyne |
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Answer» Correct Answer - C Ethane does not decolouise bromine solution because it is a saturated compound |
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| 272. |
What will be the octane no. of best fuelA. 80B. 81C. 74D. 65 |
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Answer» Correct Answer - B The best fuel is that which has greatest octane number and thus (b) option is correct |
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| 273. |
That which is not used as gaseous fuelA. GasolineB. AcetyleneC. Carbon monoxideD. Methane |
| Answer» Correct Answer - A | |
| 274. |
Kerosene is used as fuel because it isA. Less volatileB. More volatileC. CheapD. Abundantly available |
| Answer» Correct Answer - A | |
| 275. |
Which one gives only one monosubstitution product on chlorinationA. n pentaneB. N PentaneC. IsopentaneD. n butane |
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Answer» Correct Answer - B `CH_3-undersetunderset(CH_3)(|)oversetoverset(CH_3)(|)C-CH_3` Replaceable hydrogen atoms are present only on 4 primary carbon atoms. Hence, it give only one monochloro Substituted prouduct. |
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| 276. |
Which of the following is not used to distinguish ethene from ethaneA. Iodine in `C Cl_4`B. Bromine in `C Cl_4`C. Alkaline `KMnO_4`D. Ammonical `Cu_2Cl_2` |
| Answer» Correct Answer - D | |
| 277. |
When `CH_2=CH-Br` is reacted with HBr then the product formed is A and when `CH_2=CH-COOH` is treated with HBr then the product formed is C. Hence hereA. A is `undersetunderset(Br)|CH_2-undersetunderset(Br)|CH_2`B. C. C is `CH_3-undersetunderset(Br)|CH-COOH`D. C is `undersetunderset(Br)|CH_2-CH_2-COOH` |
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Answer» Correct Answer - B::D When `CH_2=CH-Br` is treated with HBr then the carbocation formed is `CH_3 overseto+CH-Br` which is resonance stabilized, hence A is `CH_3underset"Br"underset"|"CH-Br` while when `CH_2=CH-COOH` is reacted with HBr then the carbocation formed is `overseto+CH_2-CH_2-COOH` Hence C is `undersetunderset(Br)(|)CH_2-CH_2COOH` Thus (b) and (d) are correct whereas (a) and (c ) are incorrect |
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| 278. |
Which of the following compound is produced when `CH_2=CH-(CH_2)_2COOH` reacts with HBr in presence of peroxidesA. `CH_3CH(CH_2)_5COOH`B. `BrCH_2CH_2(CH_2)_2COOH`C. `CH_3CH_2CH_2(CH_2)_5COOH`D. `CH_3CH_2BrCH_2CH_2COOH` |
| Answer» Correct Answer - B | |
| 279. |
Catalyst used in dimerisation of acetylene to prepare chloroprene isA. `HgSO_4+H_2SO_4`B. `Cu_2Cl_2`C. `Cu_2Cl_2 + NH_4Cl`D. `Cu_2Cl_2 + NH_4OH` |
| Answer» Correct Answer - C | |
| 280. |
Correct order of boiling points of the above compound is :A. `P gt Q gt R gt S`B. `P gtQ gt Sgt R`C. `R gt S gt Q gtP`D. `S gt R gtQ gt P` |
| Answer» Correct Answer - A | |
| 281. |
When the boiling points of the first ten normal alkanes are plotted the graph looks like:A. B. C. D. |
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Answer» Correct Answer - B B.P. `prop "No".` of C atoms but difference decreases. |
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