Organic Chemistry Multiple Choice Questions and Answers

Questions

1 Which of the following is distinguish test for ether?

A Lucas test

B FeCl₃ test

C Molisch test

D Zeisel test

View Answer

Answer: Zeisel test

2 Which of the following statement is not true about ethers?

A The lower ethers are highly volatile and flammable

B Lower ethers also act as anaesthetics

C Ethers are not organic solvents

D Simple ethers (such as diethyl ether) are tasteless

View Answer

Answer: Ethers are not organic solvents

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3 Why ether is more volatile than an alcohol having the same molecular formula?

A dipolar character of ethers

B alcohols having resonance structures

C inter-molecular hydrogen bonding in ethers

D inter-molecular hydrogen bonding in alcohols

View Answer

Answer: inter-molecular hydrogen bonding in alcohols

4 Why the boiling point of ethyl alcohol is much higher than that of dimethyl ether though both have the same molecular weight?

A Ether is insoluble in water

B Methyl groups are attached to oxygen in ether

C Dipole moment of ethyl alcohol is less

D Ethyl alcohol shows hydrogen bonding

View Answer

Answer:Ethyl alcohol shows hydrogen bonding

5 Which of the following has lower boiling point than dimethyl ether?

A Pentane

B Propane

C Tetrahydrofuran

D n-butanol

View Answer

Answer: Propane

6 Which of the following statements about ethers is incorrect?

A Ethers are flammable

B Ethers form peroxides by free radical oxidation

C Ethers are widely used as extraction solvents

D An ether oxygen can only be found within an acyclic carbon chain

View Answer

Answer:An ether oxygen can only be found within an acyclic carbon chain

7 Which of the following product is formed, when ether is exposed to air?

A Oxide

B Alkanes

C Alkenes

D Peroxide of diethyl ether

View Answer

Answer: Peroxide of diethyl ether

8 An organic compound A reacts with sodium metal and forms B. On heating with conc. H2SO4, A gives diethyl ether. What are A and B?

A C₂H₅OH and C₂H₅ONa

B C₃H₇OH and CH₃ONa

C CH₃OH and CH₃ONa

D C₄H₉OH and C₄H₉ONa

View Answer

Answer: C₄H₉OH and C₄H₉ONa

9 What is the smell of the diethyl ether?

A Vinegar

B Sweet smell

C Rotten egg

D Fish like smell

View Answer

Answer: Sweet smell

10 Which of the following Is the correct reason for cyclic ether are miscible in water?

A Planer structure

B Larger size

C Molecular weight

D Hydrogen bonding

View Answer

Answer: Hydrogen bonding

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