Periodic Properties Test

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Periodic Properties Test - 3

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Weekly Quiz Competition

Question 1
1 / -0

From which element and atomic number the 4th period starts ?

A
Na (Z=11)

B
K (Z=19)

C
Rb (Z=37)

D
Cs (Z=55)

Solution

it starts with the Potassium having atomic number 19 because it corresponds to the filling of electrons in the fourth energy level n=4.
Question 2
1 / -0

Which of the following do not belong to lanthanoid series?

A
Europium

B
Gadolinium

C
Lutetium

D
Osmium

Solution

the lanthanoid series starts with the atomic number 57 and ends with atomic number 71. Osmium having atomic number 76 belongs to inner transition elements.
Question 3
1 / -0

Which of the following elements do not regarded as pseudo transition elements?

A
Zinc

B
Nickel

C
Mercury

D
Cadmium

Solution

the transition elements are the elements which have partially filled d and f subshell in any common oxidation state. However, Zn, Hg and Cd have completely filled subshells and do not show most of the properties of transition elements, hence regarded as pseudo transition elements.
Question 4
1 / -0

Arrange the following elements in the increasing order of metallic character-

A
P<Si<Be<Mg<Na

B
Be<Mg<Na< P<Si

C
P<Si<Be<Na< Mg

D
Mg<Na< P<Si<Be

Solution

metallic character increases down the group and decreases in a period as we move from left to right. Hence, the order of increasing metallic character is- P<Si<Be<Mg<Na.
Question 5
1 / -0

The general order for the successive ionization energy is:

A
I₁ > I₂ > I₃

B
I₁ < I₂ < I₃

C
I₁ = I₂ = I₃

D
None of the above

Solution

Successive ionization energy increases as the less electrons would be hold closer to the nucleus.
Question 6
1 / -0

Which of the following statement is not correct?

A
Electronegativity is the tendency to attract the shared pair of electrons toward itself

B
Metallic character increases down the group

C
Ammonia is more acidic than water

D
I.E. increases as we go right along the period

Solution

Acidic strength increases as we go right along the period. So, water is more acidic than ammonia
Question 7
1 / -0

Which halogen has the highest value of negative electron gain enthalpy?

A
Fluorine

B
Chlorine

C
Bromine

D
Iodine

Solution

Amongst fluorine and chlorine has more electron gain enthalpy due to bigger size and less inter electronic repulsion .
Question 8
1 / -0

The decreasing order of electron affinity is:

A
I > Br > Cl > F

B
Br > Cl > F > I

C
F > Cl > Br > I

D
Cl > F > Br > I

Solution

On moving up to down in the group. Electron affinity decrease due to decrease in size but chlorine has high electron affinity fluorine due to presence of vacant d-orbitals.

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Periodic Properties Test - 3

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Periodic Properties Test - 3

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Question 1

Na (Z=11)

K (Z=19)

Rb (Z=37)

Cs (Z=55)

Solution

Question 2

Europium

Gadolinium

Lutetium

Osmium

Solution

Question 3

Zinc

Nickel

Mercury

Cadmium

Solution

Question 4

P<Si<Be<Mg<Na

Be<Mg<Na< P<Si

P<Si<Be<Na< Mg

Mg<Na< P<Si<Be

Solution

Question 5

I1 > I2 > I3

I1 < I2 < I3

I1 = I2 = I3

None of the above

Solution

Question 6

Electronegativity is the tendency to attract the shared pair of electrons toward itself

Metallic character increases down the group

Ammonia is more acidic than water

I.E. increases as we go right along the period

Solution

Question 7

Fluorine

Chlorine

Bromine

Iodine

Solution

Question 8

I > Br > Cl > F

Br > Cl > F > I

F > Cl > Br > I

Cl > F > Br > I

Solution

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I₁ > I₂ > I₃

I₁ < I₂ < I₃

I₁ = I₂ = I₃