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.
| 1. |
Which of the following compounds are not formed in the catalytic cracking of octaneA. pentaneB. ButeneC. PropeneD. Nonane |
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Answer» Correct Answer - D Nonane is higher carbon chain |
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| 2. |
Most of hydrocarbons from petroleum are obtained byA. Fractional distilationB. Fractional crystallizationC. VaporizationD. Isomerization |
| Answer» Correct Answer - A | |
| 3. |
Petroleum is foundA. on the surface of the earthB. in the atmosphereC. in Arctic oceanD. deep under the surface of the earth |
| Answer» Correct Answer - D | |
| 4. |
Iso-octane is added to petrolA. to precipitate inorganic materialB. to prevent freezing of petrolC. to increase the boiling pointD. as an antiknocking agent |
| Answer» Correct Answer - D | |
| 5. |
Domestic cooking gas consists of mostlyA. Methane and ethaneB. Liquidfied butane and iso-butaneC. Ethylene and carbon monoxideD. Hydrogen and acetylene |
| Answer» Correct Answer - B | |
| 6. |
In the complete combustion of hydrocarbon `(C_(n)H_(2n+2))` the number of oxygen molecules required per mole of hydrocarbon isA. `(n)/(2)O_2`B. `((n+1)/(2))O_2`C. `((3n+1)/(2))O_2`D. `((n+2)/(2))O_2` |
| Answer» Correct Answer - C | |
| 7. |
Which is correct statement?A. Alkanes undergo ozonolysisB. Alkanes undergo addition reactionC. Alkene add on hydrogen to give alkanesD. alkanes add on sulphate to give sulphuric acid |
| Answer» Correct Answer - C | |
| 8. |
Octane number is related toA. GasolineB. Kerosene oilC. Diesel oilD. Lubricating oil |
| Answer» Correct Answer - A | |
| 9. |
Petroleum consists mainly ofA. Aliphatic hydrocarbonsB. Aliphatic alcoholsC. Aromatic derivativesD. none of these |
| Answer» Correct Answer - A | |
| 10. |
LPG (Household cooking gas) is mainly a mixture ofA. Methane+EthaneB. Acetylene+`O_2`C. Butane+IsobutaneD. Acetylene+`H_2` |
| Answer» Correct Answer - C | |
| 11. |
Marsh gas mainly contains:A. `CH_2=CH_2`B. `CH_4`C. `H_(2)S`D. `CHCI_3` |
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Answer» Correct Answer - B This is the property of alkene. |
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| 12. |
The major product of reaction between n-butane and bromine at `130^(@)C` isA. `CH_3CH_2CH_2CH_2Br`B. `CH_3CH_2undersetoverset(|)(CH_3)(CH)Br`C. `CH_3-undersetoverset(|)(CH_2Br)(C)H_2CH_2Br`D. `CH_3CH_2-undersetoverset(|)(CH_3)(C)HBr` |
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Answer» Correct Answer - B `CH_3-CH_2-CH_2-CH_3 underset(Delta)overset(Br_2)(to)CH_3-CH_2-CH_2-CH_3+CH_3-CH_2-underset("major")underset(CH_3)underset(|)(C)H-Br` As `2^@` free radical is more stable than `1^@` free radical |
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| 13. |
Which of the following alkane on mono chlorination produces racemic mixture ?A. Neo-pentaneB. N-butaneC. 2,3-dimethylbutaneD. 2,2,3,3-tetramethylbutane |
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Answer» Correct Answer - B n-butane on monochlorination produces racemic mixture. |
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| 14. |
Substance which forms isomeric products mono substitution is/areA. `CH_(4)`B. `C_(2)H_(6)`C. `C_(3)H_(8)`D. all |
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Answer» Correct Answer - C Propane has two different types of hydrogen |
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| 15. |
Which halogen does not appreciably react with methane in a free-radical substitution reaction?A. ChlorineB. BromineC. IodineD. Fluorine |
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Answer» Correct Answer - C Order of Reactivity `F_2 gt CI_2 gt Br_2 gt I_2` |
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| 16. |
The number of different substitution products possible when bromine and ethane are allowed to react, isA. 6B. 8C. 7D. 9 |
| Answer» Correct Answer - D | |
| 17. |
Both methane and ethane may be obtained by suitable one step reaction fromA. `C_6H_6`B. `CH_3I`C. `CH_3OH`D. `C_2H_5OH` |
| Answer» Correct Answer - B | |
| 18. |
A aqueous solution of substance on electrolysis gives ethane. The substance isA. Acetic acidB. AcetamideC. Potassium acetateD. Ethyl acetate |
| Answer» Correct Answer - C | |
| 19. |
The volume of `CH_(4) ` at NTP is formed when 20.5 g of `CH_(3)COONa` is treated with soda timeA. 4.4 lB. 2.2 lC. 3.2 lD. 5.6 l |
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Answer» Correct Answer - D `CH_(3)COONa+NaOHoverset(CaO)toCH_(4)+Na_(2)CO_(3)` |
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| 20. |
Predict the product(s) in the below reaction `R_(1)COONa+R_(2)COONaoverset("Electrolysis")to`Products (a). `R_(1)-R_(1)` only (b). `R_(2)-R_(2)` only (c). `R_(1)-R_(1)` only (d). All the above |
| Answer» (D). (crossed reactions is possible) | |
| 21. |
The cobustion of Pentane producesA. PenteneB. `HCl+H_2O`C. PentyneD. `CO_2+H_2O` |
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Answer» Correct Answer - D All hydrocarbon on combustion gives `CO_2 and H_2O`. |
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| 22. |
How many isomers are possible for pentane?A. 2B. 3C. 4D. 5 |
| Answer» Correct Answer - B | |
| 23. |
On monochlorination of pentane, the number of straight chain isomers formed isA. 4B. 3C. 2D. 1 |
| Answer» Correct Answer - B | |
| 24. |
Identify the chain propagation of chlorination of methaneA. `overset(.)(C)H_(3)+overset(.)(C)ltoCH_(3)Cl`B. `CH_(3)Cl+overset(.)(C)ltooverset(.)(C)H_(2)Cl+HCl`C. `Cl-Clunderset("homolysis")overset(hv)tooverset(.)(C)l+overset(.)(C)l`D. `overset(.)(C)l+overset(.)(C)ltoCl_(2)` |
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Answer» Correct Answer - B In chain propagation step a new free radical neutral molecule is formed |
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| 25. |
How many products are possible for monochlorination of propaneA. 1B. 2C. 3D. 4 |
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Answer» Correct Answer - B one-chloro propane, 2 chloro propane |
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| 26. |
The gases liberated at anode in the electrolysis of sodium acetate areA. `CO_(2)&H_(2)`B. `C_(2)H_(6)&CO_(2)`C. `H_(2)&C_(2)H_(6)`D. `H_(2)&O_(2)` |
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Answer» Correct Answer - B `underset(("anode"))(CH_(3)-CH_(3)+)2CO_(2)+underset(("Cathode"))(2NaOH+H_(2))` |
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| 27. |
An aqueous solution containing sodium acetate and sodium propionate is electrolyzed. Which of the following alkanes is targeter as product?A. ethaneB. PropaneC. ButaneD. All of these |
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Answer» Correct Answer - B `CH_(3)COONa(aq.)+CH_(3)CH_(2)COONararrunderset("Propane")(CH_(3)CH_(2)CH_(3))+underset("Ethane")(CH_(3)CH_(3))+underset("Butane")(CH_(3)CH_(2)CH_(2)CH_(3))` All are formed but target is propane. |
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| 28. |
Anhydrous sodium acetate on heating with sodalime givesA. Acetic acidB. MethaneC. Calcium acetateD. Ethane |
| Answer» Correct Answer - B | |
| 29. |
The product formed by heating sodium propionate with sodalime isA. AcetoneB. Propyl amineC. EthaneD. Acetaldehyde |
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Answer» Correct Answer - C The product formed by heating sodium propionate with sodalime is ethane |
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| 30. |
The function of sodalime (a mixture of solid NaOH and solid CaO) in the decarboxylation reaction isA. to increase the rate of reactionB. to decrease the rate of reactionC. to change the rate of reactionD. to cease the reaction |
| Answer» Correct Answer - B | |
| 31. |
`CH_(3)CH_(2)CH_(2)CH_(3)underset(Delta)overset(AlCl_(3)//HCl)rarr`A. `CH_(3)CH=CHCH_(3)`B. `CH_(3)CH_(2)CH_(3)`C. `CH_(3)CH_(2)CH=CH_(2)`D. `(CH_(3))_(3)CH` |
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Answer» Correct Answer - D `n`-Alkanes on heating in the presence of anhydrous `AlCl_(3)` and hydrogen chloride is isomerize to branched chain alkanes. `CH_(3)CH_(2)CH_(2)CH_(3)rarrunderset(CH_(3))underset(|)(CH_(3)CHCH_(3)` |
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| 32. |
Hydrocarbon that is liquid at room temperature is:A. pentaneB. butaneC. propaneD. ethane |
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Answer» Correct Answer - A The principal intermolecular interactions between alkane molecules are London or dispersion forces. Due to thirteen `(C_(5) "to" C_(17))` are liquids, and higher ones `(C_(18)"onwards")` are solides at `298 K`. |
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| 33. |
The conversation of liquid hydrocarbon into a mixture of gaseous compound by heat alone is known asA. HydrolysisB. ReductionC. OxidationD. Cracking |
| Answer» Correct Answer - D | |
| 34. |
2.84 g of methyl iodide was completely converted into methyl magnesium iodide and was decomposed by excess of ethanol. The volume of the gaseous hydrocarbon proudced at NTP will beA. 22.4 litreB. 224 mLC. 0.448 litreD. 0.224 litre |
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Answer» Correct Answer - C `underset("one mole")(CH_(3)I)overset(Mg)tounderset("onemole"(CH_(3)Mgl)overset(EtOH)tounderset("one mole")(CH_(4))` |
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| 35. |
Reaction of alkanes with halogen is explosive in case ofA. `CI_2`B. `F_2`C. `Br_2`D. `I_2` |
| Answer» Correct Answer - B | |
| 36. |
Dihydrogen gas adds to alkenes and alkynes in the presence of finely divided catalysts like `Pt, Pd, or Ni` to form alkanes. This process is calledA. hydrogenationB. hydrationC. hydrogenolysisD. none of these |
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Answer» Correct Answer - B Hydrogentation is the process of breaking `pi` bonds with `H_(2)` molecule. It leads to the addition of `H` atoms to an unsaturated compound. It is used in the manufacture of vanaspati ghee from edible vegetable oils. |
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| 37. |
Liquid hydrocarbons is converted into a mixture of gaseous hydrocarbon byA. CrackingB. HydrolysisC. OxidationD. Distillation |
| Answer» Correct Answer - A | |
| 38. |
Carbon black is carbon in a very finely divided state. It is used to make paints and printers ink. It is obtained by the thermal decomposition ofA. `CH_(4)`B. `CH_(3)CH_(3)`C. `(CH_(3))_(4)C`D. `CH_(3)CH_(2)CH_(3)` |
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Answer» Correct Answer - A `CH_(4)+O_(2)overset(1000^(@)C)rarr2CH_(2)` |
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| 39. |
The thermal decomposition of alkanes is known asA. CrackingB. IsomerizationC. DehydrationD. Reforming |
| Answer» Correct Answer - A | |
| 40. |
The thermal decomposition of alkanes in the absence of air is known as:A. CombustionB. OxidationC. CrackingD. Hydrogenation |
| Answer» Correct Answer - C | |
| 41. |
Which of the following compounds does not dissolve in conc. `H_(2)SO_(4)` even on warming `?`A. n-HexaneB. Diethyl etherC. 1-ButaneD. Aniline |
| Answer» Correct Answer - A | |
| 42. |
A haloalkane can be reduced to an alkane with the help of HI in presence of red phosphorus. Red phosphorusA. acts a reducing agentB. acts as dedydrating agentC. is used to regenerate HID. acts as a catalyst |
| Answer» Correct Answer - C | |
| 43. |
Which of the following formula represents an alkane?A. `C_5H_8`B. `C_20H_50`C. `C_3H_6`D. `C_4H_10` |
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Answer» Correct Answer - D `C_nH_(2n+2)thereforeC_4H_10` |
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| 44. |
Zinc-copper couple that can be used as a reducing agent is obtained byA. welding `Zn` and `Cu` wires togetherB. coating copper with `Zn`C. coating `Zn` with `Cu`D. mixing `Zn` dust and copper gauge |
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Answer» Correct Answer - C In zinc-copper couple, the main component which acts as the reducing agent is `Zn`. |
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| 45. |
A hydrocarbon with formula `C_(8)H_(18)` gives one monochloro derivative. The hydrocarbon can be:A. n-OctaneB. 2-MethylheptaneC. 2,2,4-trimethylpentaneD. 2,2,3,3-tetramethylbutane |
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Answer» Correct Answer - D `C-underset(underset(C)|)overset(overset(C)|)C-underset(underset(C)|)overset(overset(C)|)C-C` contains only `1^@` carbon atom. `therefore` all positions are equivalent. `therefore` gives only one monochloroderivative. |
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| 46. |
Which of the following methods is most appropriate for the manufacture of methane?A. Reduction of `CH_(2)Cl_(2)`B. Wurtz reactionC. Liquefaction of natural gasD. none of these |
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Answer» Correct Answer - C The main source of methane in natural gas, from which it is obtained by liquefaction. Natural gas is a mixture of gases which is found in vast quantities undergoes in certain parts of the wold. It is frquently associated with known deposits of petroleum. The composition of natural gas varies with its origin, but it predominantly consists of methane together with amounts of ethane, propane, and the butanes, and it may also contain small proportions of `H_(2), N_(2),CO_(2),H_(2)S, and He`. |
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| 47. |
Which of the following methods is most appropriate for the manufacture of methane?A. Wurtz reactionB. By reduction of `CH_2CI_2`C. Liquifaction of natural gasD. Reduction of methyl iodide |
| Answer» Correct Answer - C | |
| 48. |
In aromatisation of n-hexane, the catalyst used isA. `Cr_(2)O_(3)`B. `V_(2)O_(5)`C. `Mo_(2)O_(3)`D. all |
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Answer» Correct Answer - D `Cr_(2)O_(3),V_(2)O_(5),Mo_(2)O_(3)`. |
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| 49. |
Which of the following has highest percentage of hydrogenA. `CH_4`B. `C_2H_4`C. `C_6H_6`D. `C_2H_2` |
| Answer» Correct Answer - A | |
| 50. |
How many diffenrent alkenes can be hydrogenated to form `2`-methylbutane. |
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Answer» Correct Answer - 3 Alkenes must have the same skeletal arrangement as the alkanes as hydrogenation only converts the double bond into single bonds: `C-underset(C )underset(|)C-C-C` There are three different positions for the double bond, hence the three different alkenes: `CH_(3)underset(CH_(3))underset(|)(CH)CH=CH_(2)CH_(3)underset(CH_(3))underset(|)C=C CH_(3) CH_(2)=underset(CH_(3))underset(|)C-CH_(2)CH_(3)` |
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