ECAT Pre Engineering Chemistry Chapter 22 MCQ Test With Answer

Derivative of water is:

• Alcohals A
• Phenols B
• Either C
• Phenol D

Which is possible in ethers?

• Reactivity high A
• Oxidation and reduction B
• Reactivity towards bases C
• Towards acids D

Organic acid without a carboxylic acid group is

• Ascorbic acid A
• Vinegar B
• Oxalic acid C
• Picric acid D

Which the increase in carbon number of solubility of an alcohol

• Increases A
• Decreases B
• Remains unaffected C
• None of these D

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

• Violet A
• Green B
• Red C
• Blue D

Alcohol reacts with halogen acid to produce

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

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

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

which enzyme is not involved in the fermentation of starch ?

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

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

Ethyl alcohol is industrially prepared from ethylene by

• permanganate oxidation A
• Catalytic reduction B
• Absorbing in H₂SO₄followed by hydrolysis C
• Fermentation D

Which bond shows maximum hydrogen bonding with water?

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

The strongest acid among the following aromatic compound is

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

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

• ZnO A
• Cr₂O₃ B
• Pt C
• Ni D

Which is used as an antifreeze?

• Glycol A
• Ethyl alcohol B
• Water C
• Methanol 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
• C₆H₅OH B
• CH₃OCH₃ C
• n-hexanol D

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

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

Maximum number of active hydrogens are present in

• Acetic acid A
• Glycerol B
• Methane C
• Methanol D

Dow's process is used for the preparation of

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

Which compound shows hydrogen bonding

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

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

Which compound is called a universal solvent?

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

Dehydration of ethyl alcohol yields

• Aldehyde A
• Ketone B
• Acid C
• Alkene D

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

• 3 A
• 4 B
• 5 C
• 6 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

Ethyl alcohol may be identified by

• Ring test A
• Iodoform test B
• Tollen's test C
• Bazeyer's test D

Ethyl alcohol on oxidation with K₂Cr₂O₇gives

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

Methanol and ethanol can be distinguished by

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