JEE Advanced Chemistry Test 5

Result

JEE Advanced Chemistry Test 5

Score
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Rank
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TIME Taken - -

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Weekly Quiz Competition

Question 1
4 / -1

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

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

B
The contributing structures may have different energies

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

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

Solution

Separating opposite charges requires energy. Therefore, stability decreases.
Question 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.

A
Cl₂

B
Br₂

C
I₂

D
F₂

Solution

3Br₂ + 3Na₂CO₃→ 5NaBr + NaBrO₃ + 3CO₂

(A) (B) (C)

liquid salt salt

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

(A)

Liquid