Chemistry Test 183

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Chemistry Test 183

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Weekly Quiz Competition

Question 1
4 / -1

Catalytic hydrogenation of which of the following, gives a product that gives two monophotochlorination products (considering structural isomers only)?

A

B

C

D

Solution
Question 2
4 / -1

Stability of following alkenes in the increasing order is:

A
I < III < IV < II

B
I < II < III < IV

C
IV < III < II < I

D
II < III < IV < I

Solution

No of hyperconjugation structures in I ,III ,IV and II are respectively 3,6,6 and 6.Trans is more stable than cis isomer.
Question 3
4 / -1

Which of the following can not give H₂ gas with sodium metal ?

A

B

C

D

Solution

Ketones do not give H₂ gas with sodium metal.
Question 4
4 / -1

Select the structure with correct numbering for IUPAC name of the compound.

A

B

C

D

Solution

OH is senior than SH.
Question 5
4 / -1

Find the acid strength order:

(I) O₂N - CH₂ - COOH
(II) F - CH₂ - COOH
(III) H₃CO - CH₂ - COOH
(IV) CH₃ - CH₂ - COOH

A
I > III > II > IV

B
I > II > III > IV

C
II > I > III > IV

D
II > III > I > IV

Solution

(Acidity ∝ -I strength of groups attached)

-I strength is in order -NO₂ > -F> -OCH₃ & -CH₂CH₃ is +I group
Question 6
4 / -1

Mark the strongest acid in following questions

A

B

C

D

Solution

-NO₂ at para position increases acidity at the maximum extent due to its strong -m and -I effect.
Question 7
4 / -1

Consider the set of three compounds, which is true about basicity of these compounds in water ?

(1) MeNH₂
(2) Me₂NH and
(3) Me₃N

A
1 > 2 > 3

B
2 > 3 > 1

C
2 > 1 > 3

D
3 > 2 > 1

Solution

In RNH₂, R₂NH, R₃N ; the order of base strength is 2° > 1° > 3° when R = Me and the order is 2° > 3° > 1° when R = Et.
Question 8
4 / -1

A saturated hydrocarbon 'X' having molecular formula (C₆H₁₂) will form only one monochloro product on reaction with Cl₂ in presence of ultravoilet light. Calculate the number of dichloroproducts (structural only) of the same compound 'X'.

A
2

B
4

C
5

D
6

Solution
Question 9
4 / -1

Which resonating structure is more contributor to the actual structure ?

A

B

C

D

Solution

The structures with the least separation of formal charges are more stable. In structure C the charges are closer together making it more stable.
Question 10
4 / -1

The correct structure of tautomer of the following compound

A

B

C

D
Both A and B

Solution