JEE Advanced Chemistry Test 5

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JEE Advanced Chemistry Test 5

Result

JEE Advanced Chemistry Test 5

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Question 1/2
4 / -1

Which of the following conditions is not correct for resonating structures?

Correct

Wrong

Skipped
A
The contributing structures must have the same number of unpaired electrons

Correct

Wrong

Skipped
B
The contributing structures may have different energies

Correct

Wrong

Skipped
C
The contributing structures should be so written that unlike charges reside on atoms that are far apart

Correct

Wrong

Skipped
D
The positive charge should be present on the electropositive element and the negative charge on the electronegative element

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Solutions

Separating opposite charges requires energy. Therefore, stability decreases.
Question 2/2
4 / -1

A liquid A is treated with Na₂CO₃ solution. A mixture of two salts B and C are produced in the solution. The mixture on acidification with sulphuric acid and distillation produces the liquid A again. Identify A.

Correct

Wrong

Skipped
A
Cl₂

Correct

Wrong

Skipped
B
Br₂

Correct

Wrong

Skipped
C
I₂

Correct

Wrong

Skipped
D
F₂

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Solutions

3Br₂ + 3Na₂CO₃→ 5NaBr + NaBrO₃ + 3CO₂

(A) (B) (C)

liquid salt salt

5NaBr + NaBrO₃ + 3H₂SO₄→ 3Na₂SO₄ + 3Br₂ + 3H₂O

(A)

Liquid

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