Chemistry Test

Result

Chemistry Test - 3

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Weekly Quiz Competition

Question 1
3 / -1

The given osazone can be formed by

A
D-glucose

B
D-fructose

C
D- Idose

D
Both a and b

Solution

Formation of osazone involves only C1 and C2 carbon atoms. The rest of the carbon atoms remains uneffected.

Glucose and fructose differ only in the configurations of first and second carbon atoms remaining positions are similar. So they form same osazone.

Hence option D is the correct answer.
Question 2
3 / -1

Consider the following compounds.

Which of the above compounds has/have an active methylene group?

A
A

B
B

C
C

D
All are correct

Solution

Active methylene group should have EWG around both sides.

Hence option D is the correct answer.
Question 3
3 / -1

Identify position most favorable for aromatic substitution (EAS)

A
A

B
B

C
C

D
A and C

Solution

is activating group so it would activate ortho and para position for E.A.S but only para position is

empty so EAS will take place there.

Hence, option (b) is correct
Question 4
3 / -1

Polymer of prop – 2 – ene nitrile is-

A
saran

B
orlon

C
Dacron

D
Teflon

Solution

Prop-2 - ene nitrile Polymer $\Rightarrow$

Hence (b) is correct answer
Question 5
3 / -1

Which of the following type of compound is used to increase the hardness of the silicone polymer.

A
R₂SiCl₂

B
RSiCl₃

C
R₃SiCl

D
None of these

Solution

Hydrolysis followed by condensation polymerization of RSiCl3 produces 3-D cross-linked silicones which are hard.

Hence option B is the correct answer.
Question 6
3 / -1

Which will give only one product (excluding stereoisomer) when undergoing E₂ reaction ?

A

B

C

D

Solution

Which are identical product

Hence option (d) is correct
Question 7
3 / -1

Assume that a particular amino acid has isoelectric point as 6.0. In a solution at PH 1.0 which of the following will predominate.

A

B

C

D

Solution

In acidic medium Z witter ion
Question 8
3 / -1

[X₃B ← NH₃], in which of the following boric halide, tendency to accept electrons from nitrogen of ammonia will be least (X = halogens)

A
BI₃

B
BCl₃

C
BBr₃

D
BF₃

Solution

In BF₃, due to F back bonding to B, least Lewis acid character is observed. So out of above four, BF₃ will have least tendency to accept electron from NH₃.

Hence, option (D) is correct.
Question 9
3 / -1

End product in the reaction is,

A

B

C

D

Solution

Step 1.

Acid base reaction

Step 2.

Hence (a) option is correct.
Question 10
3 / -1

The storage battery generally used in electric power station is:

A
Nickel-Cadmium battery

B
Zinc-Carbon battery

C
Lead-Acid battery

D
None of the above

Solution

Deep-cycle lead-acid (DCLA) battery provides a steady electric current over a long time period and these are all connected together to from a battery bank. The technology of lead-acid battery is uncomplicated and the manufacturing costs are low compared to other types of batteries. So, it is cost effective and it has good discharging characteristics.

Hence option C is the correct answer/
Question 11
3 / -1

Consider the following conversions:

Among P, Q, R and S, the aromatic compound is/are

A
P

B
Q

C
R

D
All are correct

Solution

All P, Q, R are aromatic in nature as explained below:

(1) This is Friedel-Crafts alkylation reaction in which cyclopropyl methyl carbocation is formed.

(2) Cyclopendiene reacts with strong base from cyclopentadienyl anion which is aromatic in nature.

Hence option D is the correct answer.
Question 12
3 / -1

Major products is,

A

B

C

D

Solution

H-bond is available here hence stable.

Hence answer is (C)
Question 13
3 / -1

In which of the following outer d-orbital complex magnetic moment

(spin only) is √3 B.M.

A

B

C

D

Solution
Question 14
3 / -1

Among given options maximum enol content is in-

A

B

C

D

Solution

In this H-bonding leads to enol stability hence most stable.

Hence (b) option is correct
Question 15
3 / -1

In the above reaction Product A is-

A

B

C

D

Solution

The lone pair of Nitrogen will attack first because lone pair of oxygen is more stable

Hence option (C) is correct