ECAT Pre Engineering Chemistry Chapter 22 MCQ Test With Answer

Alcohol can be denaturated by adding:

• Acetone A
• Methanol B
• Pyridine C
• All D

Which of the following is produced when an aqueous solution of butan-2-ol is refluxed with dil acidified KMnO₄

• Butanol A
• Butanoic acid B
• Butanone C
• Butane D

Which compound shows hydrogen bonding

• C₂H₆ A
• C₂H₅CI B
• CH₃-O-CH₃ C
• C₂H₅OH D

Which compound contains - OH in their molecule

• Alcohol A
• Phenol B
• Alcohol and phenol C
• Ether D

General formula of alcohol is:

• ROH A
• Ar-OH B
• R-O-R C
• Ph-OH D

Which of the following groups will increase the acidity of phenol?

• -NO₂ A
• -CN B
• -X (halogens) C
• All D

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

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

Phenol gives ---------- Colour with neutral FeCl₃solution

• Violet A
• Green B
• Red C
• Blue D

The organic compounds which derivative of hydrocarbons due to oxygen is:

• Phenol A
• Alcohol B
• Alkyl halide C
• Either D

Isopropyl alcohol on oxidation gives

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

Salol is prepared from

• Salicylic acid and phenol A
• Salicylic acid and methyl alcohol B
• Both C
• None D

A compound of the formula C₄H₁₀O_{reacts with sodium and undergoes oxidation to give a carbonyl compound which does not reduce Tollen's reagent, the original compound is}

• Diethyl ether A
• n-Butyl alcohol B
• Isobutyl alcohol C
• sec-Butyl alcohol D

Phenol is more readily soluble in

• Dil. HCl A
• Both NaOH and HCl B
• NaOH sol C
• Sodium bicarbonate solution D

Which of the following is an isomer of ethanol

• CH₃OCH₃ A
• C₂H₅OC₂H₅ B
• CH₃OH C
• C₂H₅OH D

Which compound shows more hydrogen bonding?

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

Which structure shows a tertiary alcohol

• CH₃CH₂OH A
• (CH₃)₂CHOH B
• (CH₃)₃COH C
• CH₂OH D

Alcohols, phenols and ethers may be considered as derivative of

• Hydrocarbons A
• Benzene B
• Carboxylic acid C
• Water D

Which is not the enzyme involved in the preparation of ethyl alcohol by fermentation of starch

• Diastase A
• Maltase B
• Zymase C
• Invertase D

In Lucas test primary alcohol make as oily layer

• Immediately A
• In 10 mins B
• On heating C
• Not D

Na reacts with phenol to produce

• H₂gas A
• Benzene B
• CO₂gas C
• CO gas D

Which compound is more soluble in water?

• C₂H₅OH A
• C₅H₅OH B
• CH₃OCH₃ C
• n-Hexanol D

Which of the following is weakly acidic in nature

• Alcohol A
• Phenol B
• Aidehyde C
• Amide D

Alcohols are derivatives of:

• Benzene A
• Alkanes B
• Alkens C
• Alkynes D

The test used for the detection of ethanol in the mouth of a drunk driver is that the drunk driver is asked to blow air from mouth into a solution of K₂Cr₂O₇and H₂SO₄. The colour changes, if the driver is drunk

• From orange to green A
• From pink to green B
• From orange to colorless C
• From pink to colorless D

Methanol and ethanol can be distinguished by

• Iodoform test A
• Iucas test B
• Dichromate/H₂SO₄oxidation test C
• Flame test D

• A primary alcohol A
• A secondary alcohol B
• An eher C
• A phenol D

Mild oxidation of glycerol with H₂O₂/FeSO₄gives

• Glyceraldehyde A
• Dihydroxy acetone B
• Glycerose C
• None D

Which one is primary alcohol?

• Buten-2-ol A
• Propan-2-ol B
• Butaon-1-ol C
• 2,3-Dimethylhexane-4-ol 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

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