The p-Block Elements Test

Result

The p-Block Elements Test - 72

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Weekly Quiz Competition

Question 1
1 / -0

The correct statement among the following is:

A
$$(SiH_3)_3 N$$ is pyramidal and more basic than $$(CH_3)_3 N$$

B
$$(SiH_3)_3 N$$ is planar and more basic than $$(CH_3)_3N$$

C
$$(SiH_3)_3 N$$ is pyramidal and less basic than $$(CH_3)_3 N$$

D
$$(SiH_3)_3 N$$ is planar and less basic than $$(CH_3)_3 N$$

Solution

In case of $$(CH_3)_3N$$, nitrogen is $$sp^{3}$$ hybrid and pyramidal shape and no back-bonding i.e. more basic.

In case of $$(SiH_3)_3N$$, nitrogen is $$sp^{2}$$ hybrid and planar due to back bonding and less basic because lone pair is not available for donation.
Question 2
1 / -0

Nitric acid is manufactured by the Ostwald process, in which nitrogen oxide reacts with water. $$3NO_3(g)+H_2O(l) \rightarrow 2HNO_3(aq)+NO(g)$$How many grams of nitrogen dioxide are required in this reaction to produce 25.2 g of $$HNO_3$$?

A
21.6 g

B
27.6 g

C
46.8 g

D
16.0 g

Solution

XYZ
Question 3
1 / -0

In the preparation of $$HNO_3$$ by Ostwald process ammonia is:

A
Oxidized

B
Reduced

C
Neither oxidized nor reduced

D
Both oxidized and reduced

Solution
Question 4
1 / -0

In Ostwald's process for the manufacture of nitric acid, the first step involves the oxidation of ammonia gas by oxygen gas to give nitric oxide gas and steam. What is the maximum weight of nitric oxide that can obtained starting only with 10.00g of ammonia and 20.00g of oxygen?

A
15 g

B
10 g

C
2 g

D
20 g

Solution
Question 5
1 / -0

Nitric Acid is manufactured by:

A
Ostwald's Process

B
Haber's Process

C
Contact Process

D
None of these

Solution
Question 6
1 / -0

In ostwald process of manufacturing of $$HNO_3$$ , catalyst used is

A
Mo

B
Fe

C
Pt

D
Na

Solution
Question 7
1 / -0

Ammonia is produced when a mixture of ammonium chloride and substance X is heated. What is substance X?

A
Ammonium sulphate

B
Barium chloride

C
Calcium hydroxide

D
Silver nitrate

Solution
Question 8
1 / -0

When we inhale helium gas funny sound appear which is due to:

A
high density of helium than air

B
low density of air than helium

C
low density of helium than air

D
reaction between air and helium

Solution

Due to its lower density, sound travels over twice as fast through helium than it does regular air. When you breathe in helium, your voice travels much more quickly across your vocal cords.

This results in the funny sounds you make when you talk after breathing helium.

Option C is correct.
Question 9
1 / -0

Large scale manufacturing of nitric acid by the Ostwald process utilizes the reaction-

A
$$2NaNO_3+H_2SO_4 \rightarrow Na_2SO_4 + 2HNO_3$$

B
$$4NH_3+5O_2 \rightarrow 4NO+6H_2O$$

C
$$NO^{+}_{2}+NO^−_3 + H_2O \rightarrow 2HNO_3$$

D
$$2NO+O_2+H_2O \rightarrow HNO_3+HNO_2$$

Solution
Question 10
1 / -0

The catalyst used in the manufacture of $$NO$$ by Ostwald's process is:

A
$$Pt$$

B
$$Fe$$

C
$$Mo$$

D
$$Cu$$

Solution