The p-Block Elements Test

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The p-Block Elements Test - 34

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Weekly Quiz Competition

Question 1
1 / -0

The valance electron present in group 17 elements is:

A
1

B
2

C
6

D
7

Solution

Group 17 elements has outer configuration as $$ns^2np^5$$ so this group has 7 valence electrons.
Option D is correct.
Question 2
1 / -0

Which of the following is a tetratomic element?

A
Phosphorus

B
Iron

C
Calcium

D
None of the above

Solution

Tetra atomic elements are those which are made up of four atoms.

A common and biologically important element that consists as molecules of four atoms chemically bonded together is the element phosphorus.

For example phosphorus($$P_4$$) .
Question 3
1 / -0

In the manufacture of ammonia, the catalyst used is :

A
magnesium oxide

B
silver

C
gold

D
nickel

Solution

Several catalysts are being utilized. The catalyst is iron containing iron oxide, magnesium oxide, aluminium oxide and ruthenium on carbon.
Question 4
1 / -0

Directions For Questions

Select the equations for the following reactions which result in the formation of ammonia.

...view full instructions

Aluminium nitride and water

A
$$ 4AlN+{ 3H }_{ 2 }O\rightarrow 4Al\left( OH \right) _{ 3 }+4{ NH }_{ 3 }$$

B
$$ AlN+{ 4H }_{ 2 }O\rightarrow Al\left( OH \right) _{ 3 }+2{ NH }_{ 3 }$$

C
$$ AlN+{ 3H }_{ 2 }O\rightarrow Al\left( OH \right) _{ 3 }+{ NH }_{ 3 }$$

D
$$ 2AlN+{ 3H }_{ 2 }O\rightarrow 2Al\left( OH \right) _{ 3 }+2{ NH }_{ 3 }$$
Question 5
1 / -0

Write the balanced equation for the preparation of $$NH_3$$ from ammonium chloride and calcium hydroxide.

A
$${ 4NH }_{ 4 }Cl+Ca\left( OH \right) _{ 2 }\rightarrow 2{ NH }_{ 3 }+2{ CaCl }_{ 2 }+{ 2H }_{ 2 }O$$

B
$${ 2NH }_{ 4 }Cl+2Ca\left( OH \right) _{ 2 }\rightarrow 2{ NH }_{ 3 }+2{ CaCl }_{ 2 }+{ 2H }_{ 2 }O$$

C
$${ 2NH }_{ 4 }Cl+Ca\left( OH \right) _{ 2 }\rightarrow 2{ NH }_{ 3 }+{ CaCl }_{ 2 }+{ 2H }_{ 2 }O$$

D
$${ NH }_{ 4 }Cl+Ca\left( OH \right) _{ 2 }\rightarrow { NH }_{ 3 }+{ CaCl }_{ 2 }+{ 2H }_{ 2 }O$$

Solution

$${ 2NH }_{ 4 }Cl+Ca\left( OH \right) _{ 2 }\rightarrow 2{ NH }_{ 3 }+{ CaCl }_{ 2 }+{ 2H }_{ 2 }O$$
Question 6
1 / -0

In the manufacture of ammonia, what is the ratio of the reactants taken, i.e. $$N_2 {:}H_2$$?

A
$$1:1$$

B
$$1:3$$

C
$$3:1$$

D
$$2:3$$

Solution

Reactants taken for commercial production of ammonia is nitrogen and hydrogen in the presence of catalyst, high temperature and high pressure.
$${ N }_{ 2 }+3{ H }_{ 2 }\rightarrow 2{ NH }_{ 3 }$$
Question 7
1 / -0

How is ammonia collected?

A
Ammonia is less dense than air so it is collected by upward delivery.

B
Ammonia is more dense than air so it is collected by upward delivery.

C
Ammonia is more dense than air so it is collected by downward delivery.

D
None of the above.

Solution

Ammonia is less dense than air so it is collected by upward delivery or gas syringe method.
In upward delivery method a gas jar is connected by a tube to flask that is giving off gas. The gas that is less dense than air rises to the top of gas jar. The air in the gas jar is displaced until the gas jar is filled with collected gas. Ammonia is very soluble gas so the collection apparatus should be dry and not collected over water.
Question 8
1 / -0

Warming ammonium sulphate with sodium hydroxide solution gives :

A
ammonia

B
chlorine

C
nitrogen

D
none of these

Solution

$$(NH_4)_2SO_4 + 2NaOH \rightarrow Na_2SO_4 + 2H_2O + 2NH_3$$
Question 9
1 / -0

Heating ammonium chloride with sodium hydroxide produces :

A
ammonia

B
nitrogen

C
chlorine

D
none of these

Solution

$$NH_4Cl + NaOH \rightarrow H_2O + NH_3 + NaCl $$
Question 10
1 / -0

Which of the following balanced equation correctly represents the formation of ammonia using Haber's process?

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

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

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

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

Solution

$${ N }_{ 2 }+{ 3H }_{ 2 }\rightarrow 2{ NH }_{ 3 }$$
Ammonia is formed by Haber-Bosch process which uses iron oxide as the catalyst, high pressure of 1000 atm and temperature of $$400-550^oC$$.

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The p-Block Elements Test - 34

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The p-Block Elements Test - 34

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Question 1

1

2

6

7

Solution

Question 2

Phosphorus

Iron

Calcium

None of the above

Solution

Question 3

magnesium oxide

silver

gold

nickel

Solution

Question 4

$$ 4AlN+{ 3H }_{ 2 }O\rightarrow 4Al\left( OH \right) _{ 3 }+4{ NH }_{ 3 }$$

$$ AlN+{ 4H }_{ 2 }O\rightarrow Al\left( OH \right) _{ 3 }+2{ NH }_{ 3 }$$

$$ AlN+{ 3H }_{ 2 }O\rightarrow Al\left( OH \right) _{ 3 }+{ NH }_{ 3 }$$

$$ 2AlN+{ 3H }_{ 2 }O\rightarrow 2Al\left( OH \right) _{ 3 }+2{ NH }_{ 3 }$$

Question 5

$${ 4NH }_{ 4 }Cl+Ca\left( OH \right) _{ 2 }\rightarrow 2{ NH }_{ 3 }+2{ CaCl }_{ 2 }+{ 2H }_{ 2 }O$$

$${ 2NH }_{ 4 }Cl+2Ca\left( OH \right) _{ 2 }\rightarrow 2{ NH }_{ 3 }+2{ CaCl }_{ 2 }+{ 2H }_{ 2 }O$$

$${ 2NH }_{ 4 }Cl+Ca\left( OH \right) _{ 2 }\rightarrow 2{ NH }_{ 3 }+{ CaCl }_{ 2 }+{ 2H }_{ 2 }O$$

$${ NH }_{ 4 }Cl+Ca\left( OH \right) _{ 2 }\rightarrow { NH }_{ 3 }+{ CaCl }_{ 2 }+{ 2H }_{ 2 }O$$

Solution

Question 6

$$1:1$$

$$1:3$$

$$3:1$$

$$2:3$$

Solution

Question 7

Ammonia is less dense than air so it is collected by upward delivery.

Ammonia is more dense than air so it is collected by upward delivery.

Ammonia is more dense than air so it is collected by downward delivery.

None of the above.

Solution

Question 8

ammonia

chlorine

nitrogen

none of these

Solution

Question 9

ammonia

nitrogen

chlorine

none of these

Solution

Question 10

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

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

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

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

Solution

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