ECAT Pre Engineering Chemistry Chapter 22 MCQ Test With Answer

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

• Violet A
• Green B
• Red C
• Blue D

Which compound will not dissolve in H₂O

• C₆H₆ A
• C₂H₅OH B
• CH₃CH₂CH₂OH C
• CH₃- OH D

Which compound has the maximum repulsion with water?

• C₆H₆ A
• C₂H₅OH B
• CH₃CH₂CH₂OH C
• CH₃----O---CH₃ D

Which of the following compound is obtained on passing ethanol vapours on heated Al₂O₃?

• Ethylether A
• Acetone B
• Ethane C
• Ethanol D

Which is not property in ether:

• Very weak hydogen bonding A
• High b.p B
• Slightly soluble C
• Inflammable 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

I-Phenylethanol can be prepared by reaction of benzaldehyde with

• Methyl iodide an Magnesium A
• Methyl bromide B
• Methyl bromide and AIBr₃ C
• C₂H₅l and Mg D

Hydrolytic coversion of sucrose into glucose and fructose is known as

• Induction A
• Inversion B
• Insertion C
• Inhibition D

Alcohol reacts with halogen acid to produce

• Alkyl halides A
• Aldelydes B
• Ketones C
• Alkanes D

Which compound shows hydrogen bonding

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

Industrial alcohol may be denaturated by the addition of

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

Sodium phenoxide reacts with CO₂at 400 K and 4.7 atm pressure to give

• Sodium salicylate A
• Salicyl aldehyde B
• Catechol C
• Benzoic acid D

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

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

Alcohol can be denaturated by adding:

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

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

During dehydration of alcohols to alkenes by heating with conc. H₂SO₄, the initial step is

• Formation of an ester A
• Protonation of alcohol molecule B
• Formation of carbocation C
• Elimination of water D

Absolute alcohol is obtained by adding rectified apirit in alcohol:

• Water A
• Na₂CO₃ B
• NaOH C
• CaO D

Alcohol fermentation is brought about by the action of

• CO₂ A
• O₂ B
• Invertase C
• Yeast D

Which one of the following correctly describes the acid properties of phenol

• Stronger than HCI A
• Stronger than carboxylic acid B
• An acid stronger than carbonic acid C
• An acid weaker than carboxylic acid D

Compound X has molecular formula C₁₀H₁₄O and is unreactive towards mild oxidising agents. What is the structure of the compound formed by dehydration of X

• 
  A
• 
  B
• 
  C
• 
  D

Grignard reagent on reaction with a ketone forms

• Tertiary alcohol A
• Secondary alcohol B
• Primary alcohol C
• Carboxylic acid D

Ethyl alcohol on oxidation with K₂Cr₂O₇gives

• Acetic acid A
• Acetaldehyde B
• Formaldehyde C
• Formic acid D

Dehydration of glycerol give

• Propane A
• Propene B
• Acrolein C
• Benzene D

Methanol is prepared from CO and H_{2 using catalyst:}

• ZnO A
• Cr₂O₃ B
• Pt C
• Ni D

• 1-bromobutane A
• 2-bromobutane B
• 1-bromo-2-methyl propane C
• 2-bromo-2-methyl propane D

Which of the following is known as wood spirit

• Ethyl alcohol A
• Propyl alcohol B
• Methyl alcohol C
• Butyl alcohol D

Which compound is more soluble in water?

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

Which of the following compound is known as oil of winter green?

• Phenyl benzoate A
• Phenyl salicylate B
• Phenyl acetate C
• Methyl salicylate 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