Classification of Elements Test

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Classification of Elements Test - 1

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Weekly Quiz Competition

Question 1
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The correct order of acidic strength is

A
Cl₂O₇> SO₃ > P₄O₁₀

B
CO₂ > N₂O₄ > SO₃

C
Na₂O > MgO > Al₂O₃

D
K₂O > CaO > MgO

Solution

Acidic character of oxides increases as we move from left to right in a periodic table.
Hence, option A is correct.
Question 2
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A sudden jump between the values of second and third ionization energies of an atom would be associated with the electronic configuration -

A
1s², 2s², 2p⁶

B
1s², 2s², 2p⁶, 3s², 3p¹

C
1s², 2s², 2p⁶, 3s², 3p²

D
1s², 2s², 2p⁶, 3s²

Solution

Given data suggests that after removal of 2 electrons elements attains noble gas configuration
Question 3
1 / -0

Which one of the elements is most metallic

A
P

B
As

C
Sb

D
Bi

Solution

The metallic property of an element increases from top to bottom in group.
P < As < Sb < Bi
Question 4
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The hybrid state of B-atom in boron-hydride is sp², while in its dimer it has sp³ hybrid state because

A
one of the empty orbitals of boron takes part in hybridisation

B
overlapping between s and p-orbitals of H and B forms a π bond

C
B₂H₆ is an electron rich compound

D
B₂H₆ is less stable than BH₃

Solution

The hybrid state of B-atom in boron-hydride is sp², while in its dimer it has sp³ hybrid state because one of the empty orbitals of boron takes part in hybridisation

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Classification of Elements Test - 1

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Classification of Elements Test - 1

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Question 1

Cl2O7 > SO3 > P4O10

CO2 > N2O4 > SO3

Na2O > MgO > Al2O3

K2O > CaO > MgO

Solution

Question 2

1s2, 2s2, 2p6

1s2, 2s2, 2p6, 3s2, 3p1

1s2, 2s2, 2p6, 3s2, 3p2

1s2, 2s2, 2p6, 3s2

Solution

Question 3

P

As

Sb

Bi

Solution

Question 4

one of the empty orbitals of boron takes part in hybridisation

overlapping between s and p-orbitals of H and B forms a π bond

B2H6 is an electron rich compound

B2H6 is less stable than BH3

Solution

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Cl₂O₇> SO₃ > P₄O₁₀

CO₂ > N₂O₄ > SO₃

Na₂O > MgO > Al₂O₃

K₂O > CaO > MgO

1s², 2s², 2p⁶

1s², 2s², 2p⁶, 3s², 3p¹

1s², 2s², 2p⁶, 3s², 3p²

1s², 2s², 2p⁶, 3s²

B₂H₆ is an electron rich compound

B₂H₆ is less stable than BH₃