p-Block Elements Test

Result

p-Block Elements Test - 36

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Weekly Quiz Competition

Question 1
1 / -0

On heating a mixture of NH₄Cl and KNO₂, we get

A
NH₄NO₃

B
KNH₄(NO₃)₂

C
N₂

D
NO

Solution
Question 2
1 / -0

Nitrogen is relatively inactive element because:

A
Its atoms has a stable electronic configuration

B
It has low atomic radius

C
Its electronegativity is fairly high

D
Dissociation energy of its molecule is fairly high

Solution

Nitrogen is an inactive element as it has a high bond dissociation energy due to the presence of triple bond N ≡ N. Hence, viewed as a non-reactive element.
Question 3
1 / -0

Nitrogen combines with metals to form

A
Nitrites

B
Nitrates

C
Nitrosyi chloride

D
Nitrides

Solution
Question 4
1 / -0

Which of the following factors would favour the formation of ammonia?

A
High pressure

B
Low temperature

C
High volume

D
Low pressure

Solution

According to Le Chatelier's principle, high pressure would favour the formation of NH₃
N_2(g) + 3H₂_{g) ⇋ NH_3(g)
The optimum conditions for the production of NH₃ are pressure of 200 x 10⁵ Pa (about 200 atm) and temperature of -700 K.
Question 5
1 / -0

Ammonia is a Lewis base. It forms complexes with cations. Which one of the following cations does not form complex with ammonia?

A
Ag⁺

B
Cu²⁺

C
Cd²⁺

D
Pb²⁺

Solution

Ammonia is a Lewis base. It forms complexes with cations of transition elements. Pb²⁺ does not form a complex with ammonia as lead (Pb) is not a transition element. Lead (Pb) is a p - block element.