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

At standard conditions_______ has an allotropic form that is a good electrical conductor.

A
carbon

B
nitrogen

C
oxygen

D
neon

E
argon

Solution

Carbon has an allotrope known as Graphite. Graphite is a very good conductor of electricity. It can conduct electricity due to the presence of delocalized free electron.
Question 2
1 / -0

Chemical formula of cassiterite is _____.

A
$$SnO_2$$

B
$$Sn{Cl}_2$$

C
$$Sn{Cl}_4$$

D
$$SnO_4$$

Solution

Cassiterite $$(SnO_2)$$ is the only commercially important source of tin.
Question 3
1 / -0

Galena is a important mineral of _____.

A
lead

B
germanium

C
carbon

D
tin

Solution

Galena is also known as lead glance. Its chemical formula is PbS.
It is the most abundant Sulphide mineral.
so, Galena is an importnt minerl of Pb(Lead)
Question 4
1 / -0

Quartz, $$\displaystyle Si{ O }_{ 2 }$$, has a high melting point and is insoluble in most solvents. Which type of force best accounts for the physical properties of quartz?

A
Hydrogen bonding

B
Covalent bonding

C
Ionic bonding

D
Pi bonding

E
Dispersion forces

Solution

Covalent bonding is present in Quartz. Covalent bonds result in high melting point. Covalent solids are insoluble in most of the solvents.
Question 5
1 / -0

The oxidation state(s) shared by each of the elements in group IV $$(C, Si, Ge, Sn$$ and $$Pb)$$ is/are

A
$$+2$$

B
$$+4$$

C
$$+2, +4$$

D
$$-2, +2$$

Solution

$$C$$, $$Si$$, $$Ge$$, $$Sn$$ and $$Pb$$ can have both the oxidation states $$+2$$ and $$+4$$.
Example can be given as oxidation state of Carbon in Carbon Monoxide, that is $$CO$$ is $$+2$$. Whereas, oxidation state of Carbon in Carbon Dioxide, that is $$CO_2$$ is $$+4$$
Option C is the correct answer.
Question 6
1 / -0

Element X has a ground-state valence electron configuration of $$ns^{2}np^{5}$$.
Select the formula of the carbon compound most likely to be formed.

A
$$CX$$

B
$$CX_{2}$$

C
$$CX_{4}$$

D
$$CX_{6}$$

Solution

Element X has a ground-state valence electron configuration of $$ns^{2}np^{5}$$. It will share one electron to complete its octet. Thus, it will form one covalent bond. C atom shares 4 electrons to complete its octet. Hence, C atom forms 4 covalent bonds. Thus, one C atom will combine with 4 X atoms. aThe formula of the carbon compound most likely to be formed is $$CX_{4}$$.
Question 7
1 / -0

Argyrodite, briartite contain appreciable amounts of _____?

A
lead

B
germanium

C
zinc

D
copper

Solution

Only a few minerals like argyrodite, briartite, germanite, and renierite contain appreciable amounts of germanium and none in mineable deposits.
Question 8
1 / -0

Which of these non-metals would be most reactive?

A
$$P$$

B
$$S$$

C
$$Cl$$

D
$$He$$

E
$$Ne$$

Solution

1) Phosphorus is a highly reactive element and, as a result, is never found on Earth as a free element.
2) Elemental phosphorus comes in various allotropes (different crystal structures) including white, red, violet, and black phosphorus.
3) The two major forms of phosphorus are white and red.
Question 9
1 / -0

The highest concentration of _______ was found in Hartley coal ash.

A
Lead

B
Germanium

C
Antimony

D
carbon

Solution

The highest concentration ever found was in Hartley coal ash with as much as 1.6% germanium.
Question 10
1 / -0

Borax is an important mineral of :

A
aluminium

B
boron

C
indium

D
thallium

Solution

$$\begin{array}{l}\text { Borane }=\mathrm{Na}_{2}\left[\mathrm{~B}_{4}\mathrm{O}_{5}(\mathrm{OH})_{4}\right] \cdot 8 \mathrm{H}_{2} \mathrm{O} \\\text { It is the ore of boron .}\end{array}$$

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Re-Attempt Weekly Quiz Competition

The p-Block Elements Test - 35

Result

The p-Block Elements Test - 35

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SHARING IS CARING

Question 1

carbon

nitrogen

oxygen

neon

argon

Solution

Question 2

$$SnO_2$$

$$Sn{Cl}_2$$

$$Sn{Cl}_4$$

$$SnO_4$$

Solution

Question 3

lead

germanium

carbon

tin

Solution

Question 4

Hydrogen bonding

Covalent bonding

Ionic bonding

Pi bonding

Dispersion forces

Solution

Question 5

$$+2$$

$$+4$$

$$+2, +4$$

$$-2, +2$$

Solution

Question 6

$$CX$$

$$CX_{2}$$

$$CX_{4}$$

$$CX_{6}$$

Solution

Question 7

lead

germanium

zinc

copper

Solution

Question 8

$$P$$

$$S$$

$$Cl$$

$$He$$

$$Ne$$

Solution

Question 9

Lead

Germanium

Antimony

carbon

Solution

Question 10

aluminium

boron

indium

thallium

Solution

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