Chemistry Test 195

Result

Chemistry Test 195

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Weekly Quiz Competition

Question 1
4 / -1

the product C is

A

B

C

D
None of these

Solution

Active methylene groups provides the carbanionic intermediate to facillate the nucleophilic substitution reaction.
Question 2
4 / -1

A

B

C

D

Solution
Question 3
4 / -1

Cyanohydrin formation constant will be highest for

A

B

C

D

Solution

More is the electrophilicity of >C=O bond in the aldehyde, easier will be attack of CN^–, higher willl be cyanohydrin formation constant.
Question 4
4 / -1

CH₃CHO + H₂NOH → CH₃- CH =NOH + H₂O. the above reaction occur at

A
pH = 1

B
pH = 4.5

C
any value of pH

D
pH = 12

Solution

pH in this reaction is carefully controlled to maintain sufficient nucleophilicity of NH₂OH.
Question 5
4 / -1

Base catalysed aldol condensation occurs with :

A
Benzaldehyde

B
Ethanal

C
2, 2-Dimethylpropanal

D
Formaldehyde

Solution

Ethanal as it contains α – H.
Question 6
4 / -1

Which of the follwoing carboxylic acids undergoes decarboxylation easily?

A

B

C

D

Solution

β-keto acid on heating easily undergo decarboxylation via a six membered cyclic transition state.
Question 7
4 / -1

When acetamide is treated with NaOBr, the product formed is?

A
CH₃CN

B
CH₃COBr

C
CH₃NH₂

D
CH₃OH

Solution
Question 8
4 / -1

A

B

C

D

Solution
Question 9
4 / -1

Polymer which has amide linkage is :

A
nylon-66

B
terylene

C
teflon

D
bakelite

Solution
Question 10
4 / -1

Which of the following is a non reducing sugar ?

A
Glyceraldehyde

B
Glucose

C
Fructose

D
Sucrose

Solution

Sucrose does not have hemi-acetal carbon and hence it is non-reducing sugar