Classification of Elements and Periodicity in Properties Test

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Classification of Elements and Periodicity in Properties Test - 52

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Weekly Quiz Competition

Question 1
1 / -0

In general, the properties that decrease and increase down a group in the periodic table, respectively, are:

A
electronegativity and electron gain enthalpy.

B
electronegativity and atomic radius.

C
atomic radius and electronegativity

D
electron gain enthalpy and electronegativity

Solution

Electronegativity decrease as we go down the group and atomic radius increase as we go down the group.
Question 2
1 / -0

Outer configuration of $$X$$ is $$3{{\rm{d}}^5},4{{\rm{s}}^1}$$. It belongs to group number -

A
$$16$$

B
$$15$$

C
$$5$$

D
$$6$$

Solution
Question 3
1 / -0

$$1s^2,2s^2,2p^6,3s^1$$ shows configuration of:

A
$$Al^{3+}$$ in ground state

B
$$Ne$$ in excited state

C
$$Mg^+$$ in excited state

D
None of these
Question 4
1 / -0

Name the element which has a total of three shells with five electrons in its valence shells:

A
Nitogen

B
Phosphorus

C
Arsenic

D
Anitmony

E
Bismuth
Question 5
1 / -0

The process of formation of polymers from respective monomers is called________

A
condensation

B
copolymerisation

C
polymerisation

D
none of these

Solution

Polymerization is a process of reacting monomer molecules together in a chemical reaction to form larger molecules or polymers.
Question 6
1 / -0

Each period starts with an alkali metal except

A
Second period

B
First period

C
Third period

D
Sixth period

Solution
Question 7
1 / -0

Which of the following pairs show reverse properties on moving along a period from left to right and from up to down in a group:-

A
Nuclear change and electron affinity

B
Ionization energy and electron affinity

C
Atomic radius and electron affinity

D
None of these

Solution

Along period from left to right atomic radius decreases while along group up to down atomic radius increases.
same trend followed by electron affinity.
Question 8
1 / -0

The elements which occupy their positions is periodic table just after the members of zero group are:

A
metals

B
gases

C
radioactive

D
alkali metals

Solution
Question 9
1 / -0

The activation energy for a simple chemical reaction A$$\rightarrow $$B is $${ E }_{ a }$$ in forward directions. activation energy for reverse reaction

A
Is always double of $${ E }_{ a }$$

B
Is negative of $${ E }_{ a }$$

C
Is always less than $${ E }_{ a }$$

D
Can be less than or more than $${ E }_{ a }$$
Question 10
1 / -0

Pick up the correct statement.

A
Electron affinity of fluorine is more than chlorine

B
Electron affinities of noble gases are high.

C
Electron affinity of non - metals are low and those of metals are high

D
Electron affinity of element having $$d^{10}s^2$$ configuration is negative

Solution

Solution:- (D) Electron affinity of an element having $${d}^{10} {s}^{2}$$ configuration is negative
The electron affinity of an element having $${d}^{10} {s}^{2}$$ configuration is negative. This is due to the accommodating of the electron in the higher $$p$$-orbital.

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Classification of Elements and Periodicity in Properties Test - 52

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Classification of Elements and Periodicity in Properties Test - 52

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Question 1

electronegativity and electron gain enthalpy.

electronegativity and atomic radius.

atomic radius and electronegativity

electron gain enthalpy and electronegativity

Solution

Question 2

$$16$$

$$15$$

$$5$$

$$6$$

Solution

Question 3

$$Al^{3+}$$ in ground state

$$Ne$$ in excited state

$$Mg^+$$ in excited state

None of these

Question 4

Nitogen

Phosphorus

Arsenic

Anitmony

Bismuth

Question 5

condensation

copolymerisation

polymerisation

none of these

Solution

Question 6

Second period

First period

Third period

Sixth period

Solution

Question 7

Nuclear change and electron affinity

Ionization energy and electron affinity

Atomic radius and electron affinity

None of these

Solution

Question 8

metals

gases

radioactive

alkali metals

Solution

Question 9

Is always double of $${ E }_{ a }$$

Is negative of $${ E }_{ a }$$

Is always less than $${ E }_{ a }$$

Can be less than or more than $${ E }_{ a }$$

Question 10

Electron affinity of fluorine is more than chlorine

Electron affinities of noble gases are high.

Electron affinity of non - metals are low and those of metals are high

Electron affinity of element having $$d^{10}s^2$$ configuration is negative

Solution

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