Equilibrium Test

Result

Equilibrium Test - 7

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Weekly Quiz Competition

Question 1
1 / -0

The aqueous solution of sugar does not conduct electricity. However, when sodium chloride is added to water, it conducts electricity. How will you explain this statement on the basis of ionisation and how is it affected by concentration of sodium chloride?

A
NaCl ionises completely in water and increase in concentration of salt increases conductance.

B
Sugar releases more ions in water and increases conductance

C
Both sugar and NaCl ionises partially in water thereby increasing the conductance

D
Both sugar and NaCl ionises completely in water thereby increasing the conductance

Solution

1. Sugar being a non-electrolyte does not ionize in water, whereas NaCl ionizes completely in water and produces Na⁺ and Cl^- ions which help in the conduction of electricity.

2. when concetration of sodium chloride is increased, more Na⁺ and Cl^- ions will be produced. Hence, conductance increases.
Question 2
1 / -0

BF₃ does not have proton, but still acts as an acid and reacts with NH₃. choose the correct option.

A
BF₃ acts as Lewis acid and coordinate bond is formed.

B
BF₃ is a Lewis base and coordinate bond is formed.

C
BF₃ is a Brönsted acid and coordinate bond is formed.

D
BF₃ is a Brönsted base and coordinate bond is formed.

Solution

BF₃ is an electron deficient compound . Hence, it act as Lewis acid. NH₃ has a lone pair of electrons. Hence, acts as Lewis base. A coordinate bond is formed between the two, as nitrogen atom of ammonia acts as electron donor, while B of BF₃ acts as electron acceptor.H₃N: → BF₃
Question 3
1 / -0

If in the reaction N₂O₄ ⇌ 2NO₂, x is that part of N₂O₄ which dissociates, then the number of molecules at equilibrium will be

A
1 + x

B
(1 + xy)²

C
1

D
3

Solution

N₂O₄ ⇌ 2NO₂

t = 0 1 0

t = t 1 - x 2x

total moles at eqm(t = t) = 1 - x + 2x = 1+ x