ECAT Pre Engineering Chemistry Chapter 22 MCQ Test With Answer

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

Which of the following will not give iodoform test?

• Ethanol A
• Ethanal B
• Isopropyl alcohol C
• Benzyl alcohol 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

Ethylene reacts will 1% cold alkaline KMnO₄to give

• Oxalic acid A
• Acetone B
• Ethylene glycol C
• Formaldehyde D

According to Lewis concept ethers behave as:

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

Which compound shows hydrogen bonding

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

Carbolic acid is the other name for

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

An organic compound will decolorise dill acidified (aq) KMnO₄on warming, but will not decolorise bromine water. What is the compound

• KMnO₄ A
• Ethanol B
• Ethane C
• CH₃CH₂Cl D

Which compound is more soluble in water?

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

How many alcohol (including both structural isomers and stereoisomers) can have the molecular formula C₄H₁₀O

• 3 A
• 4 B
• 5 C
• 6 D

denaturing of alcohol is done by adding methanol in ethanol:

• 10% A
• 20% B
• 30% C
• 40% 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

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

Which compound is called a universal solvent?

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

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

• Violet A
• Green B
• Red C
• Blue D

Dehydration of an alcohol at 180°

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

Alcohols, phenols and ethers may be considered as derivative of

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

The strongest acid among the following aromatic compound is

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

The hydroxyl derivatives of aromatic hydrocarbons which have the -OH group directly bonded to the ring C-atom are called

• Alcohols A
• Ketones B
• Esters C
• Phenols D

Dehydration of glycerol give

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

Ethanol can be converted into ethanoic acid :

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

Mild oxidation of glycerol with H₂O₂/FeSO₄gives

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

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

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

The boiling point of glycerol is more than propanal because of

• Hybridisation A
• H-bonding B
• Resonance C
• All these factors D

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

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

Na reacts with phenol to produce

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

Alcohols react with carboxylic acid to produce the class of compounds known as

• Grignard's reagent A
• Esters B
• Amides C
• None of these D

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