Hydrocarbons Test

Result

Hydrocarbons Test - 4

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Weekly Quiz Competition

Question 1
1 / -0

Addition of HBr to HC ≡ C − CH₂ − CH = CH₂ gives

HC ≡ C − CH₂ − CHBr − CH₃ and not H₂C = CBr − CH₂ − CH = CH₂

A triple bond is less reactive than a double bond.

A
Both Statement-1 and Statement-2 are true and Statement-2 is the correct explanations of Statement-1.

B
Both Statement-1 and Statement-2 are true and Statement-2 is not the correct explanation of Statement-1.

C
Statement-1 is true but Statement-2 is false.

D
Statement-1 is false but Statement-2 is true.

Solution

Assertion is true, explanation is true and it is correct explanation of the assertion.
Question 2
1 / -0

Corey-House reaction can be used to prepare both symmetrical and unsymmetrical alkanes.

It involves the interaction between lithium dialkyl-copper with an alkyl halide both of which may contain even or odd number of carbon atoms.

A
Both Statement-1 and Statement-2 are true and Statement-2 is the correct explanations of Statement-1.

B
Both Statement-1 and Statement-2 are true and Statement-2 is not the correct explanation of Statement-1.

C
Statement-1 is true but Statement-2 is false.

D
Statement-1 is false but Statement-2 is true.

Solution

Assertion is true, explanation is true and it is correct explanation of the assertion.
Question 3
1 / -0

Melting point of neopentane is greater than that of n-pentane while the boiling point of neopentane is lower than n-pentane.

Melting point depends upon packing in crystal lattice while boiling point depends upon surface area of the molecule.

A
Both Statement-1 and Statement-2 are true and Statement-2 is the correct explanations of Statement-1.

B
Both Statement-1 and Statement-2 are true and Statement-2 is not the correct explanation of Statement-1.

C
Statement-1 is true but Statement-2 is false.

D
Statement-1 is false but Statement-2 is true.

Solution

Assertion is true, explanation is true and it is correct explanation of the assertion.
Question 4
1 / -0

2-Pentyne on hydrogenation in presence of Lindlar catalyst gives cis-1-pentene.

Addition of hydrogen in a stereospecific reaction.

A
Both Statement-1 and Statement-2 are true and Statement-2 is the correct explanations of Statement-1.

B
Both Statement-1 and Statement-2 are true and Statement-2 is not the correct explanation of Statement-1.

C
Statement-1 is true but Statement-2 is false.

D
Statement-1 is false but Statement-2 is true.

Solution

Assertion is true, explanation is true but it is nor correct explanation of the assertion.
Question 5
1 / -0

Which of the following involves the formation of an allylic carbocation?

A
3-Chloro-1-methylcyclopentene + NBS

B
1, 3-Butadiene + Br₂

C
CH₃CH = CH₂ + NBS + Br₂

D
1-Chloro-2-butene + aq. AgNO₃

Solution

All of the four involve allylic carbocation.
Question 6
1 / -0

Which of the following alkene will give same product when treated with HBr in presence and absence of benzoyl peroxide?

A
2-Butene

B
Trans-1, 2-Dichloro-2-pentene

C
1, 1-Dichloroethene

D
Cis-1, 2-Dichloro-2-pentene

Solution

Symmetrical alkenes give same product whether the addition of HBr takes place in absence or presence of a peroxide. Among the four options, only 2-butene is symmetrical.

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Re-Attempt Weekly Quiz Competition

Hydrocarbons Test - 4

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Hydrocarbons Test - 4

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SHARING IS CARING

Question 1

Both Statement-1 and Statement-2 are true and Statement-2 is the correct explanations of Statement-1.

Both Statement-1 and Statement-2 are true and Statement-2 is not the correct explanation of Statement-1.

Statement-1 is true but Statement-2 is false.

Statement-1 is false but Statement-2 is true.

Solution

Question 2

Both Statement-1 and Statement-2 are true and Statement-2 is the correct explanations of Statement-1.

Both Statement-1 and Statement-2 are true and Statement-2 is not the correct explanation of Statement-1.

Statement-1 is true but Statement-2 is false.

Statement-1 is false but Statement-2 is true.

Solution

Question 3

Both Statement-1 and Statement-2 are true and Statement-2 is the correct explanations of Statement-1.

Both Statement-1 and Statement-2 are true and Statement-2 is not the correct explanation of Statement-1.

Statement-1 is true but Statement-2 is false.

Statement-1 is false but Statement-2 is true.

Solution

Question 4

Both Statement-1 and Statement-2 are true and Statement-2 is the correct explanations of Statement-1.

Both Statement-1 and Statement-2 are true and Statement-2 is not the correct explanation of Statement-1.

Statement-1 is true but Statement-2 is false.

Statement-1 is false but Statement-2 is true.

Solution

Question 5

3-Chloro-1-methylcyclopentene + NBS

1, 3-Butadiene + Br2

CH3CH = CH2 + NBS + Br2

1-Chloro-2-butene + aq. AgNO3

Solution

Question 6

2-Butene

Trans-1, 2-Dichloro-2-pentene

1, 1-Dichloroethene

Cis-1, 2-Dichloro-2-pentene

Solution

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1, 3-Butadiene + Br₂

CH₃CH = CH₂ + NBS + Br₂

1-Chloro-2-butene + aq. AgNO₃