Periodic Classification of Elements Test

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Periodic Classification of Elements Test - 10

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Weekly Quiz Competition

Question 1
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Element X forms a chloride with the formula XCl₂ which is a solid with a high melting point. X would most likely to be in the same group of the periodic table as

A
Al

B
Mg

C
Na

D
Si

Solution

This is because Mg has a valency of +2 and would easily give its two electrons to complete its outermost electronic configuration.

So, it combines with chlorine to form XCl₂
Question 2
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Which of the following statement is not a correct statement about the trends when going from left to right across the periodic table.

A
The number of valence electrons increases

B
The atoms lose their electrons more easily

C
The oxides become more acidic

D
The elements become less metallic in nature

Solution

On moving from left to right in a period, the electropositive character of element decreases i.e. it becomes difficult for elements to lose electrons and form positive ions.
Question 3
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By considering their position in the periodic table which one of the following elements would you expect to have maximum metallic characteristic?

A
Be

B
Ge

C
Ga

D
As

Solution

It is placed on the extreme left of the periodic table where the metallic character of elements is maximum.
Question 4
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Which one of the following is the most reactive?

A
Bromine

B
Iodine

C
Fluorine

D
Chlorine

Solution

Of all the halogens given, Fluorine is the most reactive as the reactivity of non-metals decreases on going down the group.
Question 5
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Match the following with correct response.
(1) Alkali metals
(2) Alkaline earth metal
(3) Halogen
(4) Inert gas

(A) Magnesium
(B) Krypton
(C) Chlorine
(D) Sodium

A
1-D, 2-A, 3-C, 4-B

B
1-A, 2-C, 3-B, 4-D

C
1-B, 2-D, 3-A, 4-C

D
1-C, 2-B, 3-D, 4-A

Solution

Sodium is a group 1 element and all the elements of group 1 are commonly called as Alkali metals.

Magnesium is a group 2 element and all the elements of group 2 are commonly called as Alkaline earth metals.

Chlorine is a group 17 element and all the elements of group 17 are commonly called as Halogens.

Krypton is a group 18 element and all the elements of group 18 are commonly called as inert gases.
Question 6
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Match the following with correct response.
(1) Dobereiner
(2) Newland
(3) Mendeleev
(4)Modern periodic law

(A) Atomic mass
(B) Triads
(C) Atomic number
(D) Octaves

A
1-A, 2-C, 3-B, 4-D

B
1-B, 2-D, 3-A, 4-C

C
1-C, 2-B, 3-D, 4-A

D
1-D, 2-A, 3-C, 4-B

Solution

According to Dobereiner's law of triads, when elements are arranged in the order of increasing atomic masses,groups of three elements having similar chemical properties are obtained.

According to Newlands law of octaves, when elements are arranged in the order of increasing atomic masses, the properties of first element was similar to the eight element like musical notes.

According to Mendeleev's periodic law, the properties of elements are a periiodic function of their atomic masses.

According to Modern periodic law, the properties of elements are a periodic function of their atomic numbers.
Question 7
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Match the following with correct response.
(1) Short Period
(2) Third Period
(3) Fifth Period
(4) Sixth Period

(A) 32 elements
(B) 8 elements
(C) 2 elements
(D) 18 Elements

A
1-B, 2-D, 3-A, 4-C

B
1-A, 2-C, 3-B, 4-D

C
1-C, 2-B, 3-D, 4-A

D
1-D, 2-A, 3-C, 4-B

Solution

Short period comprises of two elements ( H and He).

Third period comprises of 8 elements.

Fifth period comprises of 18 elements.

Sixth period comprises of 32 elements.
Question 8
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Match the following with correct response.
(1) Periods
(2) Groups
(3) Eight groups
(4) Eighteen groups

(A) Vertical rows
(B) Mendeleev's Periodic table
(C) Horizontal rows
(D) Modern periodic table

A
1-B, 2-D, 3-A, 4-C

B
1-D, 2-A, 3-C, 4-B

C
1-C, 2-A, 3-B, 4-D

D
1-C, 2-B, 3-D, 4-A

Solution

Vertical columns in periodic table are known as Groups

Horizontal rows in periodic table are known as Periods

Mendeleev's periodic table consists of eight groups

Modern periodic table consists of eighteen groups
Question 9
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Match the following with correct response.
(1) Valency
(2) In groups
(3) In Period
(4) Elements on the left hand side

(A) Valency remains same
(B) Metals
(C) Atomic size decreases
(D) Combining capacity

A
1-D, 2-A, 3-C, 4-B

B
1-B, 2-D, 3-A, 4-C

C
1-A, 2-C, 3-B, 4-D

D
1-C, 2-B, 3-D, 4-A

Solution

Valency is the combining capacity of an element.

On moving down in a group, the valency of elements remains same.

On moving from left to right in a period, the atomic size decreases.

Elements on the left hand side of the periodic table are metals.

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Periodic Classification of Elements Test - 10

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Question 1

Al

Mg

Na

Si

Solution

Question 2

The number of valence electrons increases

The atoms lose their electrons more easily

The oxides become more acidic

The elements become less metallic in nature

Solution

Question 3

Be

Ge

Ga

As

Solution

Question 4

Bromine

Iodine

Fluorine

Chlorine

Solution

Question 5

1-D, 2-A, 3-C, 4-B

1-A, 2-C, 3-B, 4-D

1-B, 2-D, 3-A, 4-C

1-C, 2-B, 3-D, 4-A

Solution

Question 6

1-A, 2-C, 3-B, 4-D

1-B, 2-D, 3-A, 4-C

1-C, 2-B, 3-D, 4-A

1-D, 2-A, 3-C, 4-B

Solution

Question 7

1-B, 2-D, 3-A, 4-C

1-A, 2-C, 3-B, 4-D

1-C, 2-B, 3-D, 4-A

1-D, 2-A, 3-C, 4-B

Solution

Question 8

1-B, 2-D, 3-A, 4-C

1-D, 2-A, 3-C, 4-B

1-C, 2-A, 3-B, 4-D

1-C, 2-B, 3-D, 4-A

Solution

Question 9

1-D, 2-A, 3-C, 4-B

1-B, 2-D, 3-A, 4-C

1-A, 2-C, 3-B, 4-D

1-C, 2-B, 3-D, 4-A

Solution

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