ECAT Pre Engineering Chemistry Chapter 22 MCQ Test With Answer

Ethyl alcohol may be identified by

• Ring test A
• Iodoform test B
• Tollen's test C
• Bazeyer's test D

Alcohals can be distinguished using test:

• Lucas A
• Tollen's B
• Koib's C
• William's D

• Aqueous bromine A
• Dilute HNO₃ B
• Dilute HCI C
• CH₃COCI D

Which one of the following reacts immediately with conc. HCI in the presence of ZnCI₂

• Primary alcohol A
• Secondary alcohol B
• Tertiary alcohol C
• Ether D

Ethanol can be converted into ethanoic acid :

• Hydrogenation A
• Hydration B
• Oxidation C
• Fermentation D

Nitration of phenol gives

• o-nitrophenol A
• p-nitrophenol B
• m-nitrophenol C
• Both o and p-nitrophenol D

Ethanol containing some methanol is called

• Absolute spirit A
• Rectified spirit B
• Power alcohol C
• Methylated spirit D

Ethanol can be converted into ethanoic acid by

• Hydrogenation A
• Hydration B
• Oxidation C
• Fermentation D

An alcohol with molecular formula C_nH_2n+1OH has a chiral carbon atom but does not react with MnO^-₄/H⁺what is the least number of carbon atoms such an alcohol could possess

• 5 A
• 6 B
• 7 C
• 8 D

Which of the following is used as anesthetics

• Alcohol A
• Diethylether B
• Phenol C
• Dimethyl ether D

Maximum number of active hydrogens are present in

• Acetic acid A
• Glycerol B
• Methane C
• Methanol D

Isopropyl alcohol on oxidation gives

• Acetone A
• Ether B
• Ethylene C
• Acetaldehyde D

Industrial alcohol may be denaturated by the addition of

• Methyl alcohol A
• Acetone B
• Pyridine C
• Any of the above reagent D

If an electrophile attacks then ______ bond breaks first

• C - H A
• O - H B
• C - O C
• None of these D

Which compound shows more hydrogen bonding?

• C₂H₆ A
• C₂H₅Cl B
• CH₃----O----CH₃ C
• C₂H₅OH D

An organic compound 'X' on treatment with acidified K₂Cr₂O₇gives a compound 'Y' which reacts with I₂and sodium carbonate to form Triodomethane. The compound 'X' is

• CH₃OH A
• CH₃CHO B
• CH₃CH(OH)CH₃ C
• CH₃COCH₃ D

Diethyl ether is obtained by Williamsons synthesis using

• Ethanol + Na + C₂H₅Br A
• Ethanol + Mg + C₂H₅Br B
• Methanol + Na + CH₃Br C
• Methanol + Mg + CH₃Br D

The only alcohol that can be prepared by the indirect hydration of alkene is

• ethyl alcohol A
• propyl alcohol B
• isobutyl alcohol C
• methyl alcohol D

In Dow's method, phenol can be made from

• Chlorobenzene A
• Benzene B
• Toluene C
• Benzene sulphonic acid D

Carbolic acid is the other name for

• Methanol A
• Ethanol B
• Propanol C
• Phenol D

A compound is soluble in conc. H₂SO₄, it does not decolourise bromine in carbon tetrachloride but is oxidized by chromic anhydride in aqueous sulphuric acid within two seconds, turning orange solution to blue, green and then opaque. The original compound is

• Primary alcohol A
• Tertiary alcohol B
• alkene C
• ether D

In its reaction with Na, 1 mol of X gives 1 mol of H_2(g). What is X

• CH₃CH₂CH₂CH₂OH A
• (CH₃)₃COH B
• CH₃CH₂CH₂CO₂H C
• CH₃CH(OH)CO₂H D

Concentration of rectified spirit is:

• 12% A
• 14% B
• 90% C
• 95% D

An organic compound A reacts with methyl magnesium iodide to form an addition product which on hydrolysis forms the compound B . Compound B gives blue colour salt in Victor Meyer's test.The compounds A and B are respectively

• Acetaldehyde, tertiary butyl alcohol A
• Acetaldehyde, ethyl alcohol B
• Acetaldehyde, isopropyl alcohol C
• Acetone, isopropyl alcohol D

The malt-sugar in the presence of yeast or invertase gives

• Fructose A
• Glucose B
• Lignin C
• Alcohol D

The boiling points of alcohols are higher than the corresponding alkanes, This is because

• Of hydrogen bonding existing between molecules of alcohols A
• Alkanes are dipolar compounds B
• Alcohols are sweet in taste C
• Alcohols are soluble in water D

denaturing of alcohol is done by adding methanol in ethanol:

• 10% A
• 20% B
• 30% C
• 40% D

Which of the following is the most suitable method for removing the traces of water from ethanol?

• Reacting with Na metal A
• Passing dry HCl through it B
• Distilling it C
• Reacting with Mg D

When sodium metal reacts with alcohols

• Hydrogen gas evolves A
• Sodium hydroxide is obtained B
• Alcohol is reduced C
• Alcohol is polymerised D

Which of the following compounds will not react with sodium metal to release hydrogen

• CH₃CH₂CH₃ A
• CH₃CH₂OH B
• C₆H₅OH C
• C₆H₅CH₂OH D