Classification of Elements and Periodicity in Properties Test

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Classification of Elements and Periodicity in Properties Test - 18

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Weekly Quiz Competition

Question 1
1 / -0

Arrange the elements in order of their reactivity?
B, Al, Ga, In

A
B < Al < Ga < In

B
In < Ga < Al < B

C
Ga < In < Al < B

D
None of the above

Solution

On going down the group, the reactivity of elements increases.
Question 2
1 / -0

On moving left to right in a period, electron affinity of elements:

A
decreases

B
increases

C
doesnot change

D
none of the above

Solution

Along a period, on moving from left to right, electron affinity of the elements increases.
Question 3
1 / -0

Which element has the largest electron affinity?

A
$$K$$

B
$$Ca$$

C
$$Br$$

D
$$Kr$$

E
$$Zn$$

Solution

In general, non-metals which have the tendency to gain electrons, which make them electronegative in nature. So, bromine is a non-metal and other elements are metals which have the tendency to donate valence electrons. Hence, bromine largest electron affinity.
Question 4
1 / -0

In fluorine, incoming electrons are repelled by the

A
thick cloud

B
outer most shell

C
nucleus

D
atomic radii

Solution

In fluorine, incoming electrons are repelled by the "thick cloud" of electrons.

Hence, option A is correct.
Question 5
1 / -0

What is the name for the horizontal rows of the periodic table?

A
Groups

B
Periods

C
Families

D
Sets

Solution

The horizontal rows in the periodic table are periods, while the vertical rows are called groups.
Question 6
1 / -0

Write the electronic configuration of the element whose atomic charge and mass is 11 times and 23 times of the hydrogen.

A
$$2, 1$$

B
$$2, 8, 1$$

C
$$2, 8$$

D
$$2, 8, 8, 3$$

Solution

The atom belong to sodium , because the nuclear charge of the atom is 11 times and atomic mass of the atom is 23 ( nutron + protone) times of the hydrogen. As, hydrogen is having atomic mass and charge 1. Hence, the neutral sodium atom has 11 electrons and its its electronic configuration is $$ 2, 8, 1 .$$
Question 7
1 / -0

In $$CuX_2$$, X belongs to which group?

A
group IA

B
group IIA

C
group IIIA

D
group VIA

E
group VIIA

Solution

In $$CuX_2$$, as the O.S. of $$Cu$$ is $$+2$$, the O.S of $$X$$ is $$-1$$, hence the $$X$$ belongs to group VIIA.
Question 8
1 / -0

Which element reacts most explosively in water?

A
$$K$$

B
$$Ca$$

C
$$Br$$

D
$$Kr$$

E
$$Zn$$

Solution

Potassium (K) reacts most explosively in water.
Except lithium, all alkali metals reacts explosively with water.
$$\displaystyle 2K +2H_2O \rightarrow 2K^+ + 2OH^- + H_2\uparrow$$
Question 9
1 / -0

Electronic configuration of $$H^{ - }$$ is:

A
$$1 s ^ { 0 }$$

B
$$1 s ^ { 1 }$$

C
$$1 s ^ { 2 }$$

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

Solution
Question 10
1 / -0

Elements whose atoms have three outermost shells incomplete are called?

A
s-block

B
p-block

C
d-block

D
f-block

Solution

14 elements from atomic number 58 (Cerium) to 71(Lutetium) are called as Lanthanides and the another 14 elements from atomic number 90 (Thorium) to 103(Lawrencium) are called as Actinides. These 28 elements are arranged in the 2 series placed below the Modern Periodic Table and the elements in these 2 series are collectively called as f-block elements. These elements have outermost three shells incomplete. Option D is correct answer.

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Classification of Elements and Periodicity in Properties Test - 18

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Classification of Elements and Periodicity in Properties Test - 18

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SHARING IS CARING

Question 1

B < Al < Ga < In

In < Ga < Al < B

Ga < In < Al < B

None of the above

Solution

Question 2

decreases

increases

doesnot change

none of the above

Solution

Question 3

$$K$$

$$Ca$$

$$Br$$

$$Kr$$

$$Zn$$

Solution

Question 4

thick cloud

outer most shell

nucleus

atomic radii

Solution

Question 5

Groups

Periods

Families

Sets

Solution

Question 6

$$2, 1$$

$$2, 8, 1$$

$$2, 8$$

$$2, 8, 8, 3$$

Solution

Question 7

group IA

group IIA

group IIIA

group VIA

group VIIA

Solution

Question 8

$$K$$

$$Ca$$

$$Br$$

$$Kr$$

$$Zn$$

Solution

Question 9

$$1 s ^ { 0 }$$

$$1 s ^ { 1 }$$

$$1 s ^ { 2 }$$

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

Solution

Question 10

s-block

p-block

d-block

f-block

Solution

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