The p-Block Elements Test

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The p-Block Elements Test - 52

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Question 1
1 / -0

What is the colour of a solution of $$\mathrm { Al } _ { 2 } \left( \mathrm { SO } _ { 4 } \right) _ { 3 }$$ in water?

A
blue

B
pink

C
green

D
colourless

Solution

The colour of solution $$Al_2(SO_4)_3$$ in water is colourless. Hence Aluminium and sulphate reacts equally and dissolves
Question 2
1 / -0

Which of the following is amorphous form of silica?

A
Quartz

B
Kieselguhr

C
Tridymite

D
Cristobalite

Solution

Solution:- (B) Kieelguhr
kieselguhr is an amorphous form of silica.
Question 3
1 / -0

More than four bonds are made by how many elements in carbon family?

A
$$1$$

B
$$2$$

C
$$3$$

D
$$4$$

E
$$5$$

Solution

The elements belong to carbon family are:
$$Carbon-(C)$$
$$Silicon-(Si)$$
$$Germanium-(Ge)$$
$$Tin-(Sn)$$
$$Lead-(Pb)$$
$$Flerovium-(Fl)$$

Except carbon all other elements contain empty d-orbitals in their outermost shell, thus can form more than four-bonds.

Therefore 5 is the correct answer.
Question 4
1 / -0

Dry ice is

A
Solid $$CO$$

B
Solid $$SO_{2}$$

C
Solid $$CO_{2}$$

D
Solid $$O_{2}$$

Solution

Dry ice is the solid form of carbon dioxide. It is used primarily as a cooling agent. It does not melt into a liquid when heated, instead, it changes directly to gas.
Question 5
1 / -0

In silicon dioxide:

A
Each silicon atom is surrounded by four oxygen atoms and each oxygen atom is bonded to two silicon atoms.

B
Each silicon atom is surrounded by two oxygen atoms and each oxygen atom is bonded to two silicon atoms.

C
Silicon atom is bonded two oxygen atoms

D
There are double bonds to two oxygen atoms

Solution

Silicon dioxide form 3D structure where each silicon atom is surrounded by four oxygen atoms and each oxygen atom is bonded to two silicon atoms.
Question 6
1 / -0

In the modern periodic table, elements are arranged in order of increasing atomic number which is related to the electronic configuration. Depending upon the type of orbitals receiving the last electron, the elements in the periodic table have been divided into four blocks, viz s, p, d, and f. The modern periodic table consists of 7 periods and 18 groups. Each period begins with the filling of a new energy shell. In accordance with the Aufbau principle filling of a new energy shell. In accordance with the Aufbau principle, the seven-period (1 to 7) have 2,8,8,18,18,32 and 32 elements respectively. The seventh period is still incomplete. To avoid the periodic table being too long, the two series of f - block elements, called lanthanoids and actinoids are placed at the bottom of the main body of the periodic table.
The last elements of the $$p$$-block in 6th period is represented by the outer most electronic configuration.

A
$$7s^27p^6$$

B
$$5f^{14}6d^{10}7s^27p^0$$

C
$$4f^{14}5d^{10}6s^26p^6$$

D
$$4f^{14}5d^{10}6s^26p^4$$

Solution
Question 7
1 / -0

The element with atomic number 35 belongs to :

A
d-block

B
f-block

C
p-block

D
s-block

Solution

The electronic configuration of the element with atomic number 35 is $$[Ar]3d^{10}4s^24p^5$$. The last electron enters to p-subshell. Therefore, it is a p-block element.
Question 8
1 / -0

Directions For Questions

The simplest phosphoric acid $$ (H_3PO_4) $$ contains three replaceable H-atom and is tribasic.

...view full instructions

The oxidation state of P in $$ H_3PO_5 $$is :

A
+3

B
+5

C
+7

D
None of these

Solution
Question 9
1 / -0

In view of the signs of $$\Delta_r G^{\circ}$$ for the following reaction
$$PbO_2 + Pb \rightarrow 2 PbO$$, $$\Delta_r G^{\circ}$$ < 0
$$SnO_2 + Sn \rightarrow 2 SnO$$, $$\Delta_r G^{\circ}$$ > 0 which oxidation states are more characteristic for lead and tin?

A
For lead +4, for tin +2

B
For lead +2, for tin +2

C
For lead +4, for tin +4

D
For lead +2, for tin +4

Solution

$$ PbO_{2} + Pb \rightarrow 2PbO $$
+4 0 +2
Hence , $$\Delta G $$ > 0 Spontaneous +2 is more stable

$$ SnO_{2} + Sn \rightarrow 2SnO $$
+4 0 +2
Hence , $$\Delta G $$ > 0 Non - Spontaneous +2 is less stable

So for lead +2 and for Sn +4

Hence , option D is correct.
Question 10
1 / -0

Colemanite is a mineral of:

A
$$Ca$$

B
$$B$$

C
$$Al$$

D
$$Mg$$

Solution

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The p-Block Elements Test - 52

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The p-Block Elements Test - 52

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Question 1

blue

pink

green

colourless

Solution

Question 2

Quartz

Kieselguhr

Tridymite

Cristobalite

Solution

Question 3

$$1$$

$$2$$

$$3$$

$$4$$

$$5$$

Solution

Question 4

Solid $$CO$$

Solid $$SO_{2}$$

Solid $$CO_{2}$$

Solid $$O_{2}$$

Solution

Question 5

Each silicon atom is surrounded by four oxygen atoms and each oxygen atom is bonded to two silicon atoms.

Each silicon atom is surrounded by two oxygen atoms and each oxygen atom is bonded to two silicon atoms.

Silicon atom is bonded two oxygen atoms

There are double bonds to two oxygen atoms

Solution

Question 6

$$7s^27p^6$$

$$5f^{14}6d^{10}7s^27p^0$$

$$4f^{14}5d^{10}6s^26p^6$$

$$4f^{14}5d^{10}6s^26p^4$$

Solution

Question 7

d-block

f-block

p-block

s-block

Solution

Question 8

+3

+5

+7

None of these

Solution

Question 9

For lead +4, for tin +2

For lead +2, for tin +2

For lead +4, for tin +4

For lead +2, for tin +4

Solution

Question 10

$$Ca$$

$$B$$

$$Al$$

$$Mg$$

Solution

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