How to deal with the chemguys organic chemistry unit test

CONTENT:

UNIT TEST Total no of question Type of question solution

1 12 Uploaded

2 10 Uploaded

3 10 Uploaded

4 7 Uploaded

5 7 Uploaded

6 10 Uploaded

7 25 ✔️

8
8
✔️

Questions Of The Day Series

Question-8 MCQ

What is the major product of the following reaction? [NiCl2(1eq) & NaBH4 (2eq) is used]

Question-7 MCQ

The Most Contributing canonical of the following

select the correct option

Answer:

C

Solution:

Question-6 MCQ

Which member in each of the following pairs behave as a better base towards BMe3 :

Select the correct option:

Answer:

D

Solution:

Question-5: MCQ

Choose the correct option for the following two statements:

Select the correct option:

Answer:

1

Solution:

Question-4 MCQ

Among the following order, which is incorrect?

Answer: D

Solution:



Question-3 MCQ

The activation energy barrier for inversion for the following two compounds is _______.

1 A>B

2 B>A

3 A=B

4 inversion does not possible for both compound

Answer:

1

Solution:

Question-2 MCQ

1 I>II>III

2 III>II>I

3 III>I>II

4 I>III>II

Answer:

C

Solution:

Question-1 MCQ

The observed order of basicity of the following amines in gas phase is __________.

1 C>B>A

2 A>C>B

3 A>B>C

4 B>A>C

Answer:

3

Solution:

In the gas phase, the observed order of basicity agrees with that which is expected on the basis of inductive effect only.

Correct order will be option c.

Unit test-7

Question-25 Multiple select

Answer:

a, c & d

Solution:

Question-24 MCQ

Answer: C

Solution:

Question-23 NAT

Answer:4

Solution:

Question-4: MCQ 2 point

Which statement is correct for Carbonic acid?

1: It is stable in aqueous solution, but not at anhydrous condition.

2: It is unstable in aqueous solution, but stable at anhydrous condition.

3: It is stable at both aqueous & anhydrous condition

4: It is unstable at both aqueous & anhydrous condition

Answer: A

Solution:

Question-5: MCQ point-2

Possible structure of A & B :

Select the correct option:

1: A= B=

2: A= B=

3: A= B=

4: A= B=

Answer:

2

Solution:

Question-6: NAT Point-2

Answer:

4

Solution:

Question-2:

Among the following_________ are aromatic in nature. [NAT]

Answer:

2

Solution:

Aromaticity → through (4n+2) π electrons counting.

Question-3:

Among are aromatic in nature? [NAT]

______________.

Answer: 4

Solution:

Aromaticity → through (4n+2) π electrons counting.

The structure given in question at 3 will be 4-pyridone please make correction

Question-4:

In aqueous solution among the following of ________ is(are) undetectable. [MCQ]

    (A). (B)

2

Solution:

Reason:

Question-5:

Among the following non-catalytic method (s) used to carry out the following transformation _______ is(are) true.[NAT]

Question-7: MCQ point-2

Select the correct option:

1: A only

2: A & B

3: B & C

4: All

Answer:

4

Solution:

Six-membered cyclic transition states can be written for all of them.

Question-22: MCQ

Which of the condensed formula(s) in each pair represent the constitutional isomers?

Select the correct option:

Answer:

Questions Of The Day Series

Question-7 MCQ

select the correct option

d) canonical form does not exist.

Answer:C



Solution:

Question-6 MCQ

Which member in each of the following pairs behave as a better base towards BMe3 :

Select the correct option:

Answer: D

Solution:

Question-5: MCQ

Choose the correct option for the following two statements:

a

b 2,6-Di-t-butylpyridine is a specific proton scavenger.

Select the correct option:

Answer:1

Solution:

Question-4 MCQ

Among the following order, which is incorrect?

Answer: D

Solution:



Question-3 MCQ

The activation energy barrier for inversion for the following two compounds is _______.

1 A>B

2 B>A

3 A=B

4 inversion does not possible for both compound

Answer:

1

Solution:

Question-2 MCQ

1 I>II>III

2 III>II>I

3 III>I>II

4 I>III>II

Answer:C

Solution:

Question-1 MCQ

The observed order of basicity of the following amines in gas phase is __________.

1 C>B>A

2 A>C>B

3 A>B>C

4 B>A>C

Answer:3



Solution:

In the gas phase, the observed order of basicity agrees with that which is expected on the basis of inductive effect only.

Correct order will be option c.

Unit test-7

Question-25 Multiple select

Answer:a c & d

Solution:

Question-24 MCQ

Answer: C

Solution:

Question-23 NAT

Answer:

4

Solution:

Question-22: MCQ

Which of the condensed formula(s) in each pair represent the constitutional isomers?

Select the correct option:

Answer:B

Solution:

To determine whether two or more structural formulas represent constitutional isomers (i.e., different compounds with the same molecular formula), write the molecular formula of each and then compare them. All compounds that have the same molecular formula but different structural formulas (different of their atoms) are constitutional isomers.

Question-21 MCQ

Select the correct option:

Answer:

A

Solution:

Question-20 MCQ

Answer:

B

Solution:

Question-19: (MCQ)

What will be the final product?

Answer:

C

Solution:

Question-18: MCQ

For the C-N bond marked as 'a' & 'b',

a & b represent bond lengths.

Select the correct option:

1: a > b

2: b > a

3: b=a

4: a<<b

Answer:

1

Solution:

Question-17:

Among the following molecules, molecules having non-zero dipole moment is/are _______.

Ans:

B & C

Solution:

Question-16: MCQ

What will be B?

Select the correct option:

Answer:

A

Solution:

Question-15: MCQ

Select the correct option:

Answer:

D

Solution:

Question-14:

Correct combination of reagent to carry out the following transformation is _________.

Answer:

A, B & D

Solution:

Question-13 MCQ

What will be the major product?

Select the correct option:

Answer:

C

Solution:

Question-12: MCQ

For A, B & C respectively:

Select the correct option:

Answer: A

Solution:

Try self

Question-11: MCQ

What will be the major product?

Answer:

B

Solution:

Key points:

√ LDA is hindered base, it will abstract most acidic proton.

Question-10: MCQ

The correct intermediate which leads to the product in the following reaction is

Answer:

C

Solution:

Key points:

Product formation follows NGP pathway. Hence, two successive SN2 reaction takes place.

Question-9:
MCQ

What will be B

Select the correct option:

Answer:a

Solution:

Question-8:

Which of the following compounds will not undergo substitution reaction?