MCQOPTIONS
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MCQOPTIONS
This section includes 2539 Mcqs, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 301. |
. The reaction of C2H5OH with H2SO4 does not give …… |
| A. | Ethylene |
| B. | Diethyl ether |
| C. | Acetylene |
| D. | Ethyl hydrogen sulphate |
| Answer» D. Ethyl hydrogen sulphate | |
| 302. |
If formaldehyde and KOH heated then we gets, |
| A. | Acetylene |
| B. | Methane |
| C. | Methyl alcohol |
| D. | Ethyl formate |
| Answer» D. Ethyl formate | |
| 303. |
Petroleum is mainly a mixture of……….. |
| A. | Alkanes |
| B. | Cyclohexane |
| C. | Benzenoid hydrocarbons |
| D. | Alkenes |
| Answer» B. Cyclohexane | |
| 304. |
Sodium acetate can be converted to ethane by………. |
| A. | Heating with LiAlH4 |
| B. | Electrolysing its aqueous solution |
| C. | Heating with sodalime |
| D. | Heating with calcium acetate |
| Answer» C. Heating with sodalime | |
| 305. |
The final product of complete oxidation of hydrocarbons is ……….. |
| A. | Acid |
| B. | Aldehyde |
| C. | H2O + CO2 |
| D. | Dihydric alcohol |
| Answer» D. Dihydric alcohol | |
| 306. |
Which of the following is used to detect aldehydes………….. |
| A. | Million's test |
| B. | Tollen's reagent |
| C. | Neutral ferric chloride solution |
| D. | Molisch's test |
| Answer» C. Neutral ferric chloride solution | |
| 307. |
The alkane that yields two isomeric monobromo derivatives is…………… |
| A. | Neopentane |
| B. | Ethane |
| C. | Methane |
| D. | Propane |
| Answer» E. | |
| 308. |
How many types of carbon atoms are present in 2, 2, 3trimethylpentane……….. |
| A. | One |
| B. | Two |
| C. | Three |
| D. | Four |
| Answer» E. | |
| 309. |
In the process of cracking…………… |
| A. | Organic compounds decompose into their constituent elements |
| B. | Hydrocarbons decompose into carbon and hydrogen |
| C. | High molecular weight organic compounds decompose to give low molecular weight organic compounds |
| D. | Hydrocarbons yield alkyl radicals and hydrogen |
| Answer» D. Hydrocarbons yield alkyl radicals and hydrogen | |
| 310. |
The oxidation product of 2-propanol with hot conc. HNO3 is ……….. |
| A. | Ethanoic acid |
| B. | Propanone |
| C. | Propanal |
| D. | None of these |
| Answer» C. Propanal | |
| 311. |
Absolute alcohol is……. |
| A. | 100% pure ethanol |
| B. | 95% alcohol + 5% H2O |
| C. | Ethanol + water + phenol |
| D. | 95% ethanol + 5% methanol. |
| Answer» B. 95% alcohol + 5% H2O | |
| 312. |
A fuel contains 25 % n-heptane and 75 % iso-octane. Its octane number is…………… |
| A. | 50 |
| B. | 75 |
| C. | 100 |
| D. | 25 |
| Answer» C. 100 | |
| 313. |
Which of the following statements is correct….. |
| A. | Phenol is less acidic than ethyl alcohol |
| B. | Phenol is more acidic than ethyl alcohol |
| C. | Phenol is more acidic than carboxylic acid |
| D. | Phenol is more acidic than carbonic acid |
| Answer» C. Phenol is more acidic than carboxylic acid | |
| 314. |
Catalyst use in the reamer tiemman reaction. |
| A. | LiAlH4 |
| B. | CuCl3 |
| C. | Ni / H2 |
| D. | Pd |
| Answer» C. Ni / H2 | |
| 315. |
Dry distillation of sodium propanoate with sodalime gives ………….. |
| A. | Propane |
| B. | Propene |
| C. | Ethane |
| D. | Ethene |
| Answer» D. Ethene | |
| 316. |
In the preparation of Grignard reagent from haloalkane, the metal |
| A. | Mg |
| B. | Zn |
| C. | Li |
| D. | K |
| Answer» B. Zn | |
| 317. |
Product obtained by nitration of propane is ……………. |
| A. | Nitropropane |
| B. | Nitromethane |
| C. | Nitroethane |
| D. | All of these |
| Answer» E. | |
| 318. |
What is carbonyl group? |
| A. | OH |
| B. | C=O |
| C. | C- O |
| D. | None of above |
| Answer» C. C- O | |
| 319. |
Which compound has the highest boiling point…… |
| A. | Acetone |
| B. | Diethyl ether |
| C. | Methanol |
| D. | Ethanol |
| Answer» E. | |
| 320. |
Acetone and acetaldehyde are ………….. |
| A. | Position isomers |
| B. | Functional isomers |
| C. | Not isomers |
| D. | Chain isomers |
| Answer» D. Chain isomers | |
| 321. |
The key step in cannizzaro’s reaction is the intermolecular shift of ………. |
| A. | Proton |
| B. | Hydride ion |
| C. | Hydronium ion |
| D. | Hydrogen bond |
| Answer» C. Hydronium ion | |
| 322. |
Which of the following does not react with PCl5 |
| A. | CH3OH |
| B. | CH3COOH |
| C. | CH3CHO |
| D. | C2H6 |
| Answer» E. | |
| 323. |
Formaldehyde when treated with KOH gives methanol and potassium formate. The reaction is knownas……….. |
| A. | Perkin reaction |
| B. | Claisen reaction |
| C. | Cannizzaro reaction |
| D. | Knoevenagel reaction |
| Answer» D. Knoevenagel reaction | |
| 324. |
Natural gas contains mainly…………. |
| A. | Methane |
| B. | n-butane |
| C. | n-octane |
| D. | Mixture of octane |
| Answer» E. | |
| 325. |
Petroleum ether can be used as………. |
| A. | Solvent for fat, oil, varnish and rubber |
| B. | As a fuel |
| C. | Both (a) and (b) |
| D. | None of these |
| Answer» B. As a fuel | |
| 326. |
Acetaldehyde and acetone differ in their reaction with………….. |
| A. | Sodium bisulphite |
| B. | Ammonia |
| C. | Phosphorus pentachloride |
| D. | Phenyl hydrazine |
| Answer» C. Phosphorus pentachloride | |
| 327. |
Methanol and ethanol are miscible in water due to….. |
| A. | Covalent character |
| B. | Hydrogen bonding character |
| C. | Oxygen bonding character |
| D. | None of these |
| Answer» C. Oxygen bonding character | |
| 328. |
Which of the following compound gives a ketone with Grignard reagent . |
| A. | Formaldehyde |
| B. | Ethyl alcohol |
| C. | Methyl cyanide |
| D. | Methyl iodide |
| Answer» D. Methyl iodide | |
| 329. |
Dimethyl ketones are usually characterized through…………. |
| A. | Tollen's reagent |
| B. | Iodoform test |
| C. | Schiff's test |
| D. | Benedict's reagent |
| Answer» C. Schiff's test | |
| 330. |
Formaldehyde gives an additive product with methyl magnesium iodide which on aqueous hydrolysisgives ….. |
| A. | Isopropyl alcohol |
| B. | Ethyl alcohol |
| C. | Methyl alcohol |
| D. | Propyl alcohol |
| Answer» C. Methyl alcohol | |
| 331. |
In which type of reaction cyanohydrin formed from acetone? |
| A. | Nucleophilic substitution |
| B. | Electrophilic substitution |
| C. | Nucleophilic addition |
| D. | Electrophilic addition |
| Answer» D. Electrophilic addition | |
| 332. |
Which of petroleum corresponds to kerosene oil……… |
| A. | C15-C18 |
| B. | C10 – C12 |
| C. | C5 - C9 |
| D. | C1 –C9 |
| Answer» C. C5 - C9 | |
| 333. |
Propyne on hydrolysis in presence of HCl and HgSO4 gives…………. |
| A. | Acetaldehyde |
| B. | Acetone |
| C. | Formaldehyde |
| D. | None of these |
| Answer» C. Formaldehyde | |
| 334. |
Aldol condensation is dose not ocurre between……….. |
| A. | Two different ketone |
| B. | Two different aldehyde |
| C. | An ketone and aldehyde |
| D. | An aldehyde and ester |
| Answer» E. | |
| 335. |
What is the molecular formula of the alkane, the 5.6 litre of which weight 11 g at STP………. |
| A. | C6 H14 |
| B. | C4H10 |
| C. | C3H8 |
| D. | C2H6 |
| Answer» D. C2H6 | |
| 336. |
The boiling point of methanol is greater than that of methyl thiol because |
| A. | There is intramolecular hydrogen bonding in methanol and intermolecular hydrogen bonding in methyl thiol |
| B. | There is intermolecular hydrogen bonding in methanol and no hydrogen bonding in methyl thiol |
| C. | There is no hydrogen bonding in methanol and intermolecular hydrogen bonding in methyl thiol |
| D. | There is intramolecular hydrogen bonding in methanol and no hydrogen bonding in methyl thiol |
| Answer» C. There is no hydrogen bonding in methanol and intermolecular hydrogen bonding in methyl thiol | |
| 337. |
Consider the following statement Acetophenone can be prepared by…………i. Oxidation of 1-phenylethanolii. Reaction of benzalthanol with methyl magnesium bromideiii. Friedel craft’s reaction of benzene with acetyl chlorideiv. Distillation of calcium benzoate |
| A. | 1 and 2 |
| B. | 1 and 4 |
| C. | 1 and 3 |
| D. | 3 and 4 |
| Answer» D. 3 and 4 | |
| 338. |
The most volatile compound is………. |
| A. | 2, 2-dimethyl propane |
| B. | 2-methyl butane |
| C. | Isobutane |
| D. | n-pentane |
| Answer» B. 2-methyl butane | |
| 339. |
In the fractional distillation of crude petroleum……….. |
| A. | Petrol condenses at the bottom of the column |
| B. | The gases condense at the top of the column |
| C. | High boiling constituents condense at the bottom of the column |
| D. | High boiling constituents condense at the top of the column |
| Answer» D. High boiling constituents condense at the top of the column | |
| 340. |
Acetaldehyde and Acetone can be distinguished by……….. |
| A. | Iododorm test |
| B. | Nitroprusside test |
| C. | Fehling's solution test |
| D. | DNP test |
| Answer» D. DNP test | |
| 341. |
Carbon black, which is used in making printer's ink, is obtained by decomposition of…………. |
| A. | Acetylene |
| B. | Benzene |
| C. | Carbon tetrachloride |
| D. | Methane |
| Answer» E. | |
| 342. |
Which of the following statements regarding chemical properties of acetophenone are wrong……(1) It is reduced to methyl phenyl carbinol by sodium and ethanol(2) It is oxidised to benzoic acid with acidified KMnO4(3) It does not undergo iodoform electrophilic substitution like nitration at meta position(4) It does not undergo iodoform reaction with iodine and alkali |
| A. | 1 and 2 |
| B. | 2 and 4 |
| C. | 3 and 4 |
| D. | 1 and 3 |
| Answer» D. 1 and 3 | |
| 343. |
Order of reactivity of alcohols towards sodium metal is …… |
| A. | Pri > Sec > Ter |
| B. | Pri > Sec <Ter |
| C. | Pri < Sec > Ter |
| D. | Pri < Sec < Ter |
| Answer» E. | |
| 344. |
Which of the following will fail to react with potassium dichromate and dilute sulphuricacid…………… |
| A. | Ethyl alcohol (ethanol) |
| B. | Acetaldehyde (ethanal) |
| C. | Secondary propyl alcohol (2-propanol) |
| D. | Acetone (propanone) |
| Answer» E. | |
| 345. |
Which of the following are isomers……. |
| A. | Methyl alcohol and dimethyl ether |
| B. | Ethyl alcohol and dimethyl ether |
| C. | Acetone and acetaldehyde |
| D. | Propionic acid and propanone |
| Answer» C. Acetone and acetaldehyde | |
| 346. |
In aldehydes and ketones, carbon of carbonyl group is……….. |
| A. | 3 sp hybridised |
| B. | 2 sp hybridised |
| C. | sp hybridised |
| D. | Unhybridised |
| Answer» C. sp hybridised | |
| 347. |
Which will not give acetamide on reaction with ammonia ………… |
| A. | Acetic acid |
| B. | Acetyl chloride |
| C. | Acetic anhydride |
| D. | Methyl formate |
| Answer» E. | |
| 348. |
Which of the aldehyde is most reactive ? |
| A. | C6H5CHO |
| B. | CH3CHO |
| C. | HCHO |
| D. | All the equally reactive |
| Answer» E. | |
| 349. |
The number of possible enantiomeric pairs that can be produced during monochlorination of 2-methylbutane is …….. |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 1 |
| Answer» B. 3 | |
| 350. |
A mixture of propene and methane is obtained by the cracking of………….. |
| A. | 1-butene |
| B. | 2-butene |
| C. | n-butane |
| D. | Isobutane |
| Answer» D. Isobutane | |