The p-Block Elements Test

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The p-Block Elements Test - 43

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Question 1
1 / -0

The allotrope of this element is the primary absorber of UV solar radiation in Earth's atmosphere. The element is:

A
carbon

B
nitrogen

C
oxygen

D
neon

E
argon

Solution

Allotrope of oxygen which is known as ozone, is the primary absorber of UV radiation in arth's atmosphere.
Question 2
1 / -0

What is found in sulphide ores?

A
Phosphorous

B
Bismuth

C
Antimony

D
Arsenic

Solution

Generally, Bismuth is found in Sulphide ore. The ore is called Bismotninite $$(Bi_2S_3)$$
Antimony also occurs with sulphide in nature. eg. Stibnite $$(Cb_2S_3)$$. But it is a mineral, not an ore.
Similarly, Arsenic also occurs with sulphide in nature eg. Arsenic Sulfide $$(AS_2S_3)$$ But it is a mineral.
Phosphorous generally occurs as oxide.In iron ores
eg- Phosphate $$\left( { PO }_{ 4 }^{ 3- } \right) $$
Question 3
1 / -0

$$I$$. The ideal gas law can be applied to a sample of xenon at a temperature of $$-{273}^{o}C$$.
$$II$$. Xenon is a noble gas.

A
Statement $$I$$ is true, Statement $$II$$ is true

B
Statement $$I$$ is true, Statement $$II$$ is false

C
Statement $$I$$ is false, Statement $$II$$ is true

D
Statement $$I$$ is true, Statement $$II$$ is true and is a correct explanation of the phenomena described in $$I$$

Solution

Since, $$-273°C\ =\ 0\ K$$.
At absolute zero temperature i.e. 0 K, a gas will no longer be a gas, but rather it becomes a solid. So, the gas law will not be applicable in this case.
So, correct answer is option $$C$$.
Question 4
1 / -0

Statement 1: By mass, oxygen is the most abundant element in the human body.
Statement 2: It is principally found as $$O_2$$ in the bloodstream.

A
Both Statement 1 and Statement 2 are correct and Statement 2 is the correct explanation of Statement 1.

B
Both Statement 1 and Statement 2 are correct, but Statement 2 is NOT the correct explanation of Statement 1.

C
Statement 1 is correct, but Statement 2 is not correct.

D
Statement 1 is not correct, but Statement 2 is correct.

Solution

By mass, oxygen is the most abundant element in the human body.

Oxygen is found in the human body as oxy-haemoglobin in the bloodstream but not as $$O_2$$

So statement 1 is correct but not 2.
Hence option C is correct.
Question 5
1 / -0

Regardless of its electron configuration, the given element must always be paramagnetic when it's a single, neutrally charged atom.

A
Carbon

B
Nitrogen

C
Oxygen

D
Neon

E
Argon
Question 6
1 / -0

Which metal is in ores such as orpiment, realgar etc?

A
phosphorous

B
arsenic

C
nitrogen

D
bismuth

Solution

Realgar is represented by $$AS_4S_4$$ (red colour)
Orpiment is represented by $$AS_2S_3$$ (yellow-orange colour)
These both are the Sulfide minerals of Arsenic.
Hence arsenic is correct.
Question 7
1 / -0

In which of the following choices are the noble gases arranged correctly in order of increasing boiling point?

A
$$Xe, Kr, Ar, Ne$$

B
$$Ne, Ar, Kr, Xe$$

C
$$Kr, Xe, Ne, Ar$$

D
$$Ar, Ne, Kr, Xe$$

Solution

The boiling point of noble gases increases with increase in atomic size. Only weak London dispersion forces and weak van der Waals forces exist between the atoms of noble gases. The magnitude of these forces increases with an increase in the size of the atom. Thus, as the forces increase, more heat energy will be required to overcome these forces. Higher the atomic size, higher will be the boiling point.
Question 8
1 / -0

What occurs in the minerals of the apatite family?

A
phosphorous

B
arsenic

C
carbon

D
nitrogen

Solution

$$\text {Apatite is the group of phosphate ion. }\\\text {phosphorous occurs in minerals of the apatite family.Hence,A is correct option.}$$
Question 9
1 / -0

Which selection is the correct formula for the chlorate ion?

A
$${Cl}^{-}$$

B
$$Cl{O}^{-}$$

C
$$Cl{O}_{2}^{-}$$

D
$$Cl{O}_{3}^{-}$$

E
$$Cl{O}_{4}^{-}$$

Solution

The correct formula for the chlorate ion is $$Cl{O}_{3}^{-}$$
The formula $$Cl{O}^{-}$$ represents hypochlorite ion.
The formula $$Cl{O}_{2}^{-}$$ represents chlorite ion.
The formula $$Cl{O}_{4}^{-}$$ represents perchlorate ion.
Question 10
1 / -0

The atomic number of some elements are as given. Which of the following elements belong to the nitrogen family?

A
element of atomic number 33

B
element of atomic number 51

C
element of atomic number 83

D
all of the above

Solution

Atomic number 33 belongs to arsenic $$As$$. Atomic number 51 belongs to Antimony $$Sb$$. Atomic number 83 belongs to Bismuth $$Bi$$. All of them belongs to nitrogen family.

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The p-Block Elements Test - 43

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The p-Block Elements Test - 43

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Question 1

carbon

nitrogen

oxygen

neon

argon

Solution

Question 2

Phosphorous

Bismuth

Antimony

Arsenic

Solution

Question 3

Statement $$I$$ is true, Statement $$II$$ is true

Statement $$I$$ is true, Statement $$II$$ is false

Statement $$I$$ is false, Statement $$II$$ is true

Statement $$I$$ is true, Statement $$II$$ is true and is a correct explanation of the phenomena described in $$I$$

Solution

Question 4

Both Statement 1 and Statement 2 are correct and Statement 2 is the correct explanation of Statement 1.

Both Statement 1 and Statement 2 are correct, but Statement 2 is NOT the correct explanation of Statement 1.

Statement 1 is correct, but Statement 2 is not correct.

Statement 1 is not correct, but Statement 2 is correct.

Solution

Question 5

Carbon

Nitrogen

Oxygen

Neon

Argon

Question 6

phosphorous

arsenic

nitrogen

bismuth

Solution

Question 7

$$Xe, Kr, Ar, Ne$$

$$Ne, Ar, Kr, Xe$$

$$Kr, Xe, Ne, Ar$$

$$Ar, Ne, Kr, Xe$$

Solution

Question 8

phosphorous

arsenic

carbon

nitrogen

Solution

Question 9

$${Cl}^{-}$$

$$Cl{O}^{-}$$

$$Cl{O}_{2}^{-}$$

$$Cl{O}_{3}^{-}$$

$$Cl{O}_{4}^{-}$$

Solution

Question 10

element of atomic number 33

element of atomic number 51

element of atomic number 83

all of the above

Solution

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