Classification of Elements and Periodicity in Properties Test

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Classification of Elements and Periodicity in Properties Test - 36

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Weekly Quiz Competition

Question 1
1 / -0

Which group of elements does not show diagonal relationship?

A
$$Li,\,Mg$$

B
$$Be,\,Al$$

C
$$B,\,Si$$

D
$$C,\,P$$

Solution

In addition to horizontal and vertical trends, there is a diagonal relationship between elements such as Li and Mg, Be and Al, B and Si.

A diagonal relationship is said to exist between certain pairs of diagonally adjacent elements in the second and third periods of the periodic table.

But $$C,\,P$$ doesn't show diagonal relationship.
Question 2
1 / -0

Which of the following properties is nearly same for two families?
Family-1; Be, Mg, Ca, Sr........
Family-2; He, Ne, Ar, Kr........

A
EN

B
EA

C
IP

D
OS (oxidation state)

Solution

The electron affinity is nearly same for two families.
Family-1 Be, Mg, Ca, Sr........
Family-2 He, Ne, Ar, Kr........
Electron affinities of alkaline earth metals (group 2 metals) and noble gases (group 18 members) are positive.
This is due to
(a) stable configurations $$(ns^2)$$ of the valence shells of alkaline earth metals.
(b) stable configuration $$(ns^2np^6)$$ of noble gases.
Question 3
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Which one of the following order is not in accordance with the property stated against it?

A
$$F > Cl > Br > I$$ : Electron gain enthalpy

B
$$F_2 > Cl_2 > Br_2 > I_2$$ : oxidising power

C
$$HI > HBr > HCl > HF$$ : acidic property in water

D
$$F > Cl > Br > I$$ : electronegativity
Question 4
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The electronic configuration of the element which is just above the element with atomic number 43 in the same periodic group is :

A
$$1s^2,\, 2s^2\, 2p^6,\, 3s^2\, 3p^6\, 3d^5,\, 4s^2$$

B
$$1s^2,\, 2s^2\, 2p^6,\, 3s^2\, 3p^6\, 3d^{10}\, 4s^2\,4p^5$$

C
$$1s^2,\, 2s^2\, 2p^6,\, 3s^2\, 3p^6\, 3d^6,\, 4s^1$$

D
$$1s^2,\, 2s^2\, 2p^6,\, 3s^2\, 3p^6\, 3d^{10},\, 4s^1\,4p^6$$

Solution

The element with atomic number 43 is Tc and the element just above this element is 43-18= 25 which is Mn$$[Ar]{ 3d }^{ 5 }{ 4s }^{ 2 }$$
Question 5
1 / -0

Many properties of an element and its compounds can be predicted from the position of that an element in the periodic table. What property could not be predicted this way?

A
The acidic or basic nature of its oxide

B
The formula of its oxide

C
The number of isotopes it has

D
Its metallic or non-metallic properties

Solution

$$\left( \ast \right) $$ Many properties of an element from position of element in periodic table some properties.
(i) Acidic or basic nature of oxide
(ii) Oxidationstate
(iii) Formula of oxide
(iv) Metallic or non-metallic oxide.
But it cannot tell number of isotopes it has.
Ans :- C
Question 6
1 / -0

The given diagram represents _________.

A
$$S$$

B
$$S^-$$

C
$$Cl$$

D
$$Cl^-$$

Solution

The electronic configuration is defined as a distribution of electrons of an atom or molecule in the atomic or molecular orbital.
A diagram shows the distribution of an electron in shells of the atom. There are total $$16$$ protons and $$16$$ neutrons. A number of protons are equal to an atomic number. So, the given diagram is of sulphur having one negative charge. In neutral atom Number of protons is equal to a number of electrons and this diagram has one electron more i.e. $$17$$ electron. Hence, it is $$S^-$$ represented by the diagram.
Question 7
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According to Mendleev's periodic law which properties of the elements are the periodic function of their atomic masses?

A
Physical properties

B
Chemical properties

C
Physical and chemical properties both

D
None of these

Solution

According to Mendeleev's periodic law physical and chemical properties both of the elements are the periodic function of their atomic masses
Question 8
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Which of the following statements is incorrect about the trends in periodic properties in the periodic table ?

A
Metallic character increases from Li to Cs

B
The acidity of oxides increases from left to right in a period

C
Noble gases have the highest electron affinity among all the elements in the periodic table

D
Ionisation energy of aluminium is lower than that of magnesium

Solution

Electron affinity of noble gases is zero as these are highly inert gases because of their completely filled shells they have no tendency to gain or lose electrons.
Question 9
1 / -0

An element M belongs to the group 1 and period 3 of the modern periodic table. Out of the following statement, which is the true about 'M'?

A
It forms an acidic oxide having formula $$M_2 O_3$$

B
It is a non-metal

C
It is highly electro positive in nature

D
It has a valency of three

Solution

Group 1 elements are highly electropositive in nature as they can easily lose one electron which is present in their valence shell to attain stable configuration and so is electropositive.
Question 10
1 / -0

The element having electronic configuration $$[Kr]4d^{10}\, 4f^{14}\, 5s^2\, 5p^6\, 5d^1\, 6s^2$$ belongs to :

A
s-block

B
p-block

C
d-block

D
f-block

Solution

The last 4f subshell in which the electrons are filled in the electronic configuration of element states that the element belongs to f block.

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Re-Attempt Weekly Quiz Competition

Classification of Elements and Periodicity in Properties Test - 36

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Classification of Elements and Periodicity in Properties Test - 36

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SHARING IS CARING

Question 1

$$Li,\,Mg$$

$$Be,\,Al$$

$$B,\,Si$$

$$C,\,P$$

Solution

Question 2

EN

EA

IP

OS (oxidation state)

Solution

Question 3

$$F > Cl > Br > I$$ : Electron gain enthalpy

$$F_2 > Cl_2 > Br_2 > I_2$$ : oxidising power

$$HI > HBr > HCl > HF$$ : acidic property in water

$$F > Cl > Br > I$$ : electronegativity

Question 4

$$1s^2,\, 2s^2\, 2p^6,\, 3s^2\, 3p^6\, 3d^5,\, 4s^2$$

$$1s^2,\, 2s^2\, 2p^6,\, 3s^2\, 3p^6\, 3d^{10}\, 4s^2\,4p^5$$

$$1s^2,\, 2s^2\, 2p^6,\, 3s^2\, 3p^6\, 3d^6,\, 4s^1$$

$$1s^2,\, 2s^2\, 2p^6,\, 3s^2\, 3p^6\, 3d^{10},\, 4s^1\,4p^6$$

Solution

Question 5

The acidic or basic nature of its oxide

The formula of its oxide

The number of isotopes it has

Its metallic or non-metallic properties

Solution

Question 6

$$S$$

$$S^-$$

$$Cl$$

$$Cl^-$$

Solution

Question 7

Physical properties

Chemical properties

Physical and chemical properties both

None of these

Solution

Question 8

Metallic character increases from Li to Cs

The acidity of oxides increases from left to right in a period

Noble gases have the highest electron affinity among all the elements in the periodic table

Ionisation energy of aluminium is lower than that of magnesium

Solution

Question 9

It forms an acidic oxide having formula $$M_2 O_3$$

It is a non-metal

It is highly electro positive in nature

It has a valency of three

Solution

Question 10

s-block

p-block

d-block

f-block

Solution

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