ECAT Pre Engineering Chemistry Chapter 22 MCQ Test With Answer

The reaction of aromatic acyl chloride and phenol in the presence of a base NaOH or pyridine is called

• Kolbe's reaction A
• Perkin's reaction B
• Sandmeyer's reaction C
• Schotten Baumann reaction D

When phenol is distilled with zinc dust. It is reduced to

• Benzene A
• Benzaldehyde B
• Toluene C
• Hexanol D

Which compound shows more hydrogen bonding?

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

Treatment of a secondary alcohol with a suitable oxidizing agent (K₂Cr₂O₇) results in the formation of

• Ketone A
• Aidehyde B
• Ether C
• Alkyl halide D

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

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

Which compound is more soluble in water?

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

Glucose in the presence of zymase is converted into

• Alcohol A
• Acid B
• Ethyl alcohol C
• Ketone D

Which compound has the maximum repulsion with water?

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

The strongest acid among the following aromatic compound is

• Ortho-nitrophenol A
• Para-chlorophenol B
• Para-nitrophenol C
• Meta-nitrophenol D

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

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

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

Use of ethanol as:

• Drink A
• Solvent and fuel B
• In beverage C
• All of these D

Phenols are derivative of:

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

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

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

Dehydration of an alcohol at 180°

• Alkene A
• Ether B
• Ester C
• An hydride D

When ethylene glycol is heated with acidified potassium permanganate, the main organic compound obtained is

• Oxalic acid A
• Glyoxal B
• Formic acid C
• Ethanol D

When phenol is reduced in the presence of Zn dust, we get

• Cyclohexene A
• Cyclohexane B
• Benzene C
• Benzyne D

Alcohals can be distinguished using test:

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

Which compound shows hydrogen bonding

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

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

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

According to Lewis concept ethers behave as:

• Acid A
• Base B
• Acid as well as a base C
• None of them D

Alcohols are derivatives of:

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

Mild oxidation of glycerol with H₂O₂/FeSO₄gives

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

Ethanol is prepared in Pakistan form fermentation of:

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

The order of reactivity of halogen acids for reaction with C₂H₅OH is

• HCl > HBr > HI A
• HI > HBr > HCl B
• HBr > HI > HCl C
• HBr > HCl > HI D

Methanol and ethanol can be distinguished by

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

The reaction of sodium with ethanol gives

• CH₃OH A
• NaH B
• H₂O C
• H₂ D

Which is not property in ether:

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

When alcohol reacts with concentreated H₂SO₄intermediate compound formed as

• carbonium ion A
• alkoxy ion B
• alkyl hydrogen sulphate C
• non of these D