The p-Block Elements Test

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The p-Block Elements Test - 35

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Weekly Quiz Competition

Question 1
1 / -0

Industrially, ammonia is obtained by direct combination between nitrogen and hydrogen. The formation of ammonia is promoted at:

A
1000 atm

B
200 atm

C
25 atm

D
1 atm

Solution

Ammonia is prepared industrially by Haber's process.
In this process, dinitrogen directly reacts with Dihydrogen in $$1:3$$ in presence of iron catalyst with promoters as oxides of potassium or aluminium.
The physical conditions required for this process are $$200-300$$ atm pressure and $$400-450^0C$$ temperature.
Question 2
1 / -0

With reference to Haber's process, the required catalyst used is :

A
iron oxide

B
aluminium oxide

C
magnesium oxide

D
all of the above

Solution

$${ N }_{ 2 }+{ 3H }_{ 2 }\rightarrow 2{ NH }_{ 3 }$$
Haber-Bosch process involves the direct reaction of hydrogen and nitrogen. This reaction requires the use of a catalyst high pressure($$100-1000$$ atm) and elevated temperature($$400-550^0C$$). The catalyst can be iron oxide, magnesium oxide, aluminium oxide.
Question 3
1 / -0

The characteristic of the last elements in the periods of a periodic table:

A
orbital completely

B
zero electron affinity

C
zero tendency in accepting electrons

D
All of these

Solution

In a period the last element will have completely filled configuration by filling up that orbital completely.Hence they are called noble gases or inert elements as they do not participate in the bonding formation.They are also called zero group elements as they have zero electron affinity that is zero tendency in accepting electrons as they already have stability.
Question 4
1 / -0

An alkaline gas, which produces dense white fumes when reacted with HCl gas is________.

A
ammonia

B
chlorine

C
nitrogen

D
oxygen

Solution

An alkaline gas which produces dense white fumes when reacted with HCl gas is ammonia and fumes are of compound ammonium chloride.
Question 5
1 / -0

Equation for the following reaction.
$$Cu+{ xHNO }_{ 3 }\rightarrow Cu\left( { NO }_{ 3 } \right) _{ 2 }+{ 2H }_{ 2 }O+{ 2NO }_{ y }$$
Find the value of $$x$$ and $$y$$.

A
$$x=4, y= 2$$

B
$$x=1, y= 2$$

C
$$x=2, y= 2$$

D
$$x=4,, y= 1$$

Solution

$$Cu+{ 4HNO }_{ 3 }\rightarrow Cu\left( { NO }_{ 3 } \right) _{ 2 }+{ 2H }_{ 2 }O+{ 2NO }_{ 2 }$$
Question 6
1 / -0

Give the balanced reaction for the manufacture of the ammonia gas.

A
$$3{ N }_{ 2 }+3{ H }_{ 2 }\rightarrow 6{ NH }_{ 3 }$$

B
$${ N }_{ 2 }+3{ H }_{ 2 }\rightarrow 2{ NH }_{ 3 }$$

C
$${ N }_{ 2 }+3{ H }_{ 2 }\rightarrow { NH }_{ 3 }$$

D
$${ N }_{ 2 }+6{ H }_{ 2 }\rightarrow 4{ NH }_{ 3 }$$

Solution

$${ N }_{ 2 }+3{ H }_{ 2 }\rightarrow 2{ NH }_{ 3 }$$
In the manufacture of ammonia process employed is Haber-Bosch which occurs in the presence of catalyst at high temperature and high pressure.
Question 7
1 / -0

The diagram below shows the set up for the laboratory preparation of a pungent alkaline gas.
The balanced equation for the above preparation is :

A
$$2CaO+{ 2NH }_{ 4 }Cl\rightarrow 2{ CaCl }_{ 2 }+{ H }_{ 2 }O+{ 2NH }_{ 3 }$$

B
$$CaO+{ NH }_{ 4 }Cl\rightarrow { CaCl }_{ 2 }+{ H }_{ 2 }O+{ NH }_{ 3 }$$

C
$$CaO+{ 2NH }_{ 4 }Cl\rightarrow { CaCl }_{ 2 }+{ H }_{ 2 }O+{ 2NH }_{ 3 }$$

D
$$2CaO+{ NH }_{ 4 }Cl\rightarrow 2{ CaCl }_{ 2 }+{ H }_{ 2 }O+{ 2NH }_{ 3 }$$

Solution

Ammonia gas $$(NH_3)$$ can be prepared in the laboratory by heating calcium oxide and ammonium chloride. The ammonia gas formed is dried over $$CaO$$.
The balanced reaction for above preparation is:
$$CaO+{ 2NH }_{ 4 }Cl\rightarrow { CaCl }_{ 2 }+{ H }_{ 2 }O+{ 2NH }_{ 3 }$$
Question 8
1 / -0

Which reaction of ammonia forms the first step of Ostwald's process?

A
The catalytic oxidation of ammonia by platinum catalyst

B
The catalytic oxidation of ammonia by cobalt catalyst

C
The catalytic reduction of ammonia by platinum catalyst

D
The oxidation of ammonia

Solution

The first step of Ostwald's process is the catalytic oxidation of ammonia by platinum catalyst for the formation of nitric acid.
$$NH_3+O_2 \xrightarrow {Pt} NO+ H_2O$$
Question 9
1 / -0

The set up shown in the diagram is for the laboratory preparation of a pungent alkaline gas. The gas collected in the jar is _________ .

A
ammonia

B
chlorine

C
sulfur dioxide

D
carbon monoxide

Solution

$$\begin{array}{l}\text{ The mixture in round bottomed flask }\text{ is }\mathrm{NH}_{4}\mathrm{Cl}+\mathrm{Ca}(\mathrm{OH})_{2}\\\text { Gas collected in jar }\mathrm{NH}_{3}\text { (g). }\end{array}$$
Question 10
1 / -0

The set up shown in the diagram is for the laboratory preparation of a pungent alkaline gas. What is the name of drying agent used in the process?

A
Quick lime

B
Magnesium oxide

C
Calcium carbonate

D
None of these

Solution

$$\begin{array}{l}\text{ The Drying Agent is CaO (Quick lime) .}\text{ It is used to dry ammonia gas }\end{array}$$

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Re-Attempt Weekly Quiz Competition

The p-Block Elements Test - 35

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The p-Block Elements Test - 35

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SHARING IS CARING

Question 1

1000 atm

200 atm

25 atm

1 atm

Solution

Question 2

iron oxide

aluminium oxide

magnesium oxide

all of the above

Solution

Question 3

orbital completely

zero electron affinity

zero tendency in accepting electrons

All of these

Solution

Question 4

ammonia

chlorine

nitrogen

oxygen

Solution

Question 5

$$x=4, y= 2$$

$$x=1, y= 2$$

$$x=2, y= 2$$

$$x=4,, y= 1$$

Solution

Question 6

$$3{ N }_{ 2 }+3{ H }_{ 2 }\rightarrow 6{ NH }_{ 3 }$$

$${ N }_{ 2 }+3{ H }_{ 2 }\rightarrow 2{ NH }_{ 3 }$$

$${ N }_{ 2 }+3{ H }_{ 2 }\rightarrow { NH }_{ 3 }$$

$${ N }_{ 2 }+6{ H }_{ 2 }\rightarrow 4{ NH }_{ 3 }$$

Solution

Question 7

$$2CaO+{ 2NH }_{ 4 }Cl\rightarrow 2{ CaCl }_{ 2 }+{ H }_{ 2 }O+{ 2NH }_{ 3 }$$

$$CaO+{ NH }_{ 4 }Cl\rightarrow { CaCl }_{ 2 }+{ H }_{ 2 }O+{ NH }_{ 3 }$$

$$CaO+{ 2NH }_{ 4 }Cl\rightarrow { CaCl }_{ 2 }+{ H }_{ 2 }O+{ 2NH }_{ 3 }$$

$$2CaO+{ NH }_{ 4 }Cl\rightarrow 2{ CaCl }_{ 2 }+{ H }_{ 2 }O+{ 2NH }_{ 3 }$$

Solution

Question 8

The catalytic oxidation of ammonia by platinum catalyst

The catalytic oxidation of ammonia by cobalt catalyst

The catalytic reduction of ammonia by platinum catalyst

The oxidation of ammonia

Solution

Question 9

ammonia

chlorine

sulfur dioxide

carbon monoxide

Solution

Question 10

Quick lime

Magnesium oxide

Calcium carbonate

None of these

Solution

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