The p-Block Elements Test

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The p-Block Elements Test - 26

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Weekly Quiz Competition

Question 1
1 / -0

Mono atomic element among the following is:

A
phosphorus

B
oxygen

C
krypton

D
sulphur

Solution

Oxygen is diatomic gas.

Phosphorous is tetra atomic.

Sulphur is polyatomic.

Whereas being an inert gas, Krypton is monoatomic.

Question 2

1 / -0

The elements with atomic numbers $$2, 10, 18, 36, 54$$ and $$86$$ are collectively known as:

alkaline earth metals

inert gases

halogens

rare earths

Solution

Zero group of Mendeleev's periodic table or the group $$18$$ of long form of periodic table is comprised of six elements and these eleements are called as inert gases as trhese elements do not react (inert) with other elements due to their octet outer electronic configaration which is stable configaration. The electronic configuration is listed in the following table.

S.No	Element	Symbol	Atomic number	Electronic configuration
1	Helium	He	2	1s2
2	Neon	Ne	10	[He] 2s2sp6
3	Argon	Ar	18	[Ne] 3s23p6
4	Krypton	Kr	36	[Ar] 3d104s24p6
5	Xenon	Xe	54	[Kr] 4d105s25p6
6	Radon	Rn	86	[Xe] 4f145d106s26p6

Question 3
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Which of the following electronic configuration corresponds to an inert gas?

A
$$1s^{1}2s^{2}2p^{5}$$

B
$$1s^{2}2s^{2}2p^{6}$$

C
$$1s^{2}2s^{1}$$

D
$$1s^{2}2s^{2}2p^{6}3s^{1}$$

Solution

Noble gases have full-filled configuration i.e the subshell are completely filled.

They have the general electronic configuration as $$ns^2 np^6$$.

Thus option B represents a noble gas.
Question 4
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Elements with atomic numbers 9, 17, 35, 53 are collectively known as:

A
chalcogens

B
halogens

C
lanthanides

D
rare gases

Solution

Elements having the atomic number:

9 is fluorine: $$(He)2s^22p^5$$
17 is chlorine: $$(Ne)3s^23p^5$$
35 is bromine: $$(Ar)4s^24p^5$$
53 is iodine: $$(Kr)5s^25p^5$$

We can observe here that all these elements having the general electronic configuration of $$ns^2np^5$$, hence these elements belong to $$17^{th}$$ group elements.
Question 5
1 / -0

The inert gas present in the second long period is:

A
$$Kr$$

B
$$Xe$$

C
$$Ar$$

D
$$Rn$$

Solution

Periods $$4$$ and $$5$$ are called long periods as they contain $$18$$ elements each.

$$4$$th period is called the first long period and the inert gas in this period is $$Kr$$.

$$5$$th period is the second long period where $$Xe$$ is the inert gas element.
Question 6
1 / -0

$$Al+X\overset{\Delta}{\rightarrow} Y \overset{H_{2}O}{\rightarrow} Z+NH_{3}$$
Here $$X, Y$$ and $$Z$$ are respectively:

A
$$O_{2}, \; Al_{2}O_{3}, \; Al(OH)_{3}$$

B
$$N_{2}, \; AlN, \; Al_{2}O_{3}$$

C
$$N_{2}, \; AlN, \; Al(OH)_{3}$$

D
$$CO_{2}, \; Al_{4}C_{3}, \; CH_{4}$$

Solution

$$2Al+N_{2}\overset{\Delta}{\rightarrow}2AlN\overset{H_{2}O}{\rightarrow}Al(OH)_{3}+NH_{3}$$
Question 7
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If a new noble gas is discovered then, what will be its atomic number?

A
$$87$$

B
$$104$$

C
$$118$$

D
$$132$$

Solution

$$Rn = 86+ 32 = 118$$

The atomic number of next inert gas to be discovered will be $$118$$.
Question 8
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The outer most electronic configuration of the most electronegative element is:

A
$$\mathrm{n}\mathrm{s}^{2}\mathrm{n}\mathrm{p}^{3}$$

B
$$\mathrm{n}\mathrm{s}^{2}\mathrm{n}\mathrm{p}^{4}$$

C
$$\mathrm{n}\mathrm{s}^{2}\mathrm{n}\mathrm{p}^{5}$$

D
$$\mathrm{n}\mathrm{s}^{2}\mathrm{n}\mathrm{p}^{6}$$

Solution

Halogens are most electronegative.

Therefore outer electronic configuration is $$ns^{2}\ np^{5}.$$

Option C is correct.
Question 9
1 / -0

Which of the following does not contain fluorine?

A
Fluorspar

B
Cryolite

C
Flouorospatite

D
Chile saltpeter

Solution

Chile saltpeter - $$NaNO_{3}$$ does not contain Fluorine.
All contain Fluorine $$\left\{\begin{matrix}
Fluorspar - CaF_{2}\\Cryolite - Na_{3}AlF_{6}
\\Flourospatite - Ca_{5}(PO_{4})_{3}F \end{matrix}\right.$$
Question 10
1 / -0

To prepare $$XeF_6$$ at 573 K, 50-60 atm pressure, the ratio of xenon and fluorine used is :

A
1 : 2

B
1 : 5

C
1 : 20

D
10 : 1

Solution

The ratio of xenon and fluorine is 1:20 at 573K, 50-60 atm pressure to prepare $$XeF_{6}$$.

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The p-Block Elements Test - 26

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The p-Block Elements Test - 26

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Question 1

phosphorus

oxygen

krypton

sulphur

Solution

Question 2

alkaline earth metals

inert gases

halogens

rare earths

Solution

Question 3

$$1s^{1}2s^{2}2p^{5}$$

$$1s^{2}2s^{2}2p^{6}$$

$$1s^{2}2s^{1}$$

$$1s^{2}2s^{2}2p^{6}3s^{1}$$

Solution

Question 4

chalcogens

halogens

lanthanides

rare gases

Solution

Question 5

$$Kr$$

$$Xe$$

$$Ar$$

$$Rn$$

Solution

Question 6

$$O_{2}, \; Al_{2}O_{3}, \; Al(OH)_{3}$$

$$N_{2}, \; AlN, \; Al_{2}O_{3}$$

$$N_{2}, \; AlN, \; Al(OH)_{3}$$

$$CO_{2}, \; Al_{4}C_{3}, \; CH_{4}$$

Solution

Question 7

$$87$$

$$104$$

$$118$$

$$132$$

Solution

Question 8

$$\mathrm{n}\mathrm{s}^{2}\mathrm{n}\mathrm{p}^{3}$$

$$\mathrm{n}\mathrm{s}^{2}\mathrm{n}\mathrm{p}^{4}$$

$$\mathrm{n}\mathrm{s}^{2}\mathrm{n}\mathrm{p}^{5}$$

$$\mathrm{n}\mathrm{s}^{2}\mathrm{n}\mathrm{p}^{6}$$

Solution

Question 9

Fluorspar

Cryolite

Flouorospatite

Chile saltpeter

Solution

Question 10

1 : 2

1 : 5

1 : 20

10 : 1

Solution

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