ECAT Pre Engineering Chemistry Chapter 22 MCQ Test With Answer

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

Which compound shows more hydrogen bonding?

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

Alcohols are named by replacing 'e' of alkane with:

• al A
• ene B
• ol C
• one D

Which of the following is an isomer of ethanol

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

Hydrolytic coversion of sucrose into glucose and fructose is known as

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

Scientific study of fermentation was first made by

• Buchner A
• Liebig B
• Biot C
• Pasteur D

Oxidation of ter-alcohol gives:

• Aldehyde A
• Formaldehyde B
• Ketone C
• Alkens D

Which bond shows maximum hydrogen bonding with water?

• CH₃OH A
• C₂H₅OH B
• CH₃----O----CH₃ C
• C₆H₅OH D

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

Dow's process is used for the preparation of

• Ester A
• Ethers B
• Alcohols C
• Phenols D

Rectified spirit contains alcohol about

• 80% A
• 85% B
• 90% C
• 95% D

The organic compounds which are derivative of hydrocarbons of oxygen are:

• Carbohydrates A
• Phenols B
• Alcohals C
• All of these 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

which enzyme is not involved in the fermentation of starch ?

• Diastase A
• Zymase B
• Urease C
• Invertase 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

Phenol is heated with CCl₄and alkaline KOH when salicylic acid is produced.The reaction is known as

• Frledel-Craft reaction A
• Riemer-Tiemann's reaction B
• Rosenmund's reaction C
• Sommelet reaction 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

Which of the following is weakly acidic in nature

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

Carbolic acid is the other name for

• Methanol A
• Ethanol B
• Propanol C
• Phenol 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

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

Ethyl alcohol on oxidation with K₂Cr₂O₇gives

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

Alcohol reacts with halogen acid to produce

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

Ethanol is prepared in Pakistan form fermentation of:

• Starch A
• Sugar B
• Glucose C
• Molasses D

Alcohals can be distinguished using test:

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

Which compound is called a universal solvent?

• H₂O A
• CH₃OH B
• C₂H₅OH C
• CH₃----O---CH₃ D

How many secondary alcoholic groups are present in the structure of glucose OHC CHOH CHOHCH OH CHOH CH₂OH

• 1 A
• 2 B
• 3 C
• 4 D

Alcohols reacts with Grignard reagent to form

• Alkanes A
• Alkenes B
• Alkynes C
• All D

Methyl alcohol is not used

• As a solvent A
• A an anti-freezing agent B
• As a substitute for petrol C
• For denaturing of ethyl alcohol D