Chemistry Test 16

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Chemistry Test 16

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Weekly Quiz Competition

Question 1
4 / -1

According to the modern periodic table, the physical properties of the elements are periodic functions of their _______.

A
Atomic mass

B
Atomic number

C
Isotopes

D
Isobars

Solution

modern periodic law is defined as “The physical and chemical properties of the elements are periodic functions of their atomic numbers”.
Question 2
4 / -1

The IUPAC name of the element is Unniloctium. What would be the atomic number of this element?

A
108

B
118

C
128

D
None of these

Solution

the root for un, nil and oct are 1, 0 and 8 respectively. Hence, the atomic number of the element is 108 with the symbol Uno.
Question 3
4 / -1

Which of the following is a transition element?

A
Phosphorus

B
Zinc

C
Sodium

D
Copper

Solution

the transition elements are the elements which have partially filled d and f subshell in any common oxidation state.

Zn is called pseudo transition element but Cu is a transition element it has completely filled d subshell in its excited state.
Question 4
4 / -1

Which elements are never found in free state rather in combined state?

A
S-block elements

B
P-block elements

C
D-block elements

D
Representative elements

Solution

the reactivity order of s-block elements increases down the group. Due to their high reactivity, these elements are never found in Free State rather in combined state.
Question 5
4 / -1

Which of the following ions is hydrolysed to the maximum extent?

A
Al³⁺

B
Ga³⁺

C
Tl⁺

D
Tl³⁺

Solution

Higher charge density, higher will be the extent of hydrolysis of the ion. Among the given ion, aluminium has the smallest size, so it will have the highest charge density.

Thus, it will get hydrolyses to the maximum extent.
Question 6
4 / -1

Out of the following, which of the following is most non-metallic?

A
Sodium

B
Potassium

C
Magnesium

D
Aluminium

Solution

in a period, the non-metallic character increases from left to right whereas the non-metallic character decreases down the group. Hence, Aluminium exhibits highest non-metallic character.
Question 7
4 / -1

Which of the following statements about periodic table is incorrect?

A
The p-block has 6 columns because a maximum of 6 electrons can occupy all the orbitals in the p-subshell.

B
The d-block has 8 columns because a maximum of 8 electrons can occupy all the orbitals in the d-subshell.

C
Each block contains a number of columns equal to the number of electrons that occupy the subshell.

D
The block indicates the value of azimuthal quantum number for the last subshell which received electrons.

Solution

the d-block elements are referred as transition elements. The d-block has 10 columns because a maximum of 10 electrons can occupy all the orbitals in the d-subshell.
Question 8
4 / -1

Which group of elements acts as strong reducing agents?

A
Representative elements

B
S-block

C
P-block

D
D-block

Solution

s-block elements have low ionisation enthalpy and greater tendency to donate electrons. Thus, they act as strong reducing agents in comparison to other group of elements.

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Chemistry Test 16

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Chemistry Test 16

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Question 1

Atomic mass

Atomic number

Isotopes

Isobars

Solution

Question 2

108

118

128

None of these

Solution

Question 3

Phosphorus

Zinc

Sodium

Copper

Solution

Question 4

S-block elements

P-block elements

D-block elements

Representative elements

Solution

Question 5

Al3+

Ga3+

Tl+

Tl3+

Solution

Question 6

Sodium

Potassium

Magnesium

Aluminium

Solution

Question 7

The p-block has 6 columns because a maximum of 6 electrons can occupy all the orbitals in the p-subshell.

The d-block has 8 columns because a maximum of 8 electrons can occupy all the orbitals in the d-subshell.

Each block contains a number of columns equal to the number of electrons that occupy the subshell.

The block indicates the value of azimuthal quantum number for the last subshell which received electrons.

Solution

Question 8

Representative elements

S-block

P-block

D-block

Solution

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Al³⁺

Ga³⁺

Tl⁺

Tl³⁺