QBManager

Classification of Elements and Periodicity in Properties

89409 In the periodic table from left to right in a period, the atomic volume
3. Atomic and Ionic Radii

1 decrease

2 increase

3 remains same

4 first decrease then increase

NEET-1993

Classification of Elements and Periodicity in Properties

89408 In the periodic table from left to right in a period, the atomic volume
3. Atomic and Ionic Radii

1 decrease

2 increase

3 remains same

4 first decrease then increase

NEET-1993

Classification of Elements and Periodicity in Properties

89338 The long form of periodic Table is based on

1 mass of the atom

2 atomic number

3 shapes of the atom

4 electronegegativity

AIIMS-1994

Classification of Elements and Periodicity in Properties

89390 The stability of ferric ion is due to :

1 half filled

f

- orbitals

2 half filled d- orbitals

3 completely filled f-orbitals

4 completely filled d- orbitals

Explanation:

Ferric ion ${Fe}^{3 +}$ has half filled d-orbital. The electronic configuration of irons is $(Ar) 3 d^{6} 4 s^{2}$ . So, when we say ferric it mean iron loses three electrons, that is it loses two electron from $2 s$ -orbitals and one electron from $3 d$ orbitals. Therefore, ferric ion has $d -$ orbital is filled by 5 electrons that is half filled and half filled orbitals are stable.

BCECE-2006

Classification of Elements and Periodicity in Properties

89339 Given below are two statements:
One is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) Metallic character decreases and non-metallic character increases on moving from left to right in a period.
Reason (R) It is due to increase in ionisation enthalpy and decrease in electron gain enthalpy, when one moves from left to right in a period.
In the light of the above statements, choose the most appropriate answer from the options given below.

1 (A) is false but (R) is true

2 (A) is true but (R) is false

3 Both (A) and (R) are correct and (R) is the correct explanation of (A)

4 Both (A) and (R) are correct but (R) is not the correct explanation of (A)

(JEE Main 2021

Classification of Elements and Periodicity in Properties

89409 In the periodic table from left to right in a period, the atomic volume
3. Atomic and Ionic Radii

1 decrease

2 increase

3 remains same

4 first decrease then increase

NEET-1993

Classification of Elements and Periodicity in Properties

89408 In the periodic table from left to right in a period, the atomic volume
3. Atomic and Ionic Radii

1 decrease

2 increase

3 remains same

4 first decrease then increase

NEET-1993

Classification of Elements and Periodicity in Properties

89338 The long form of periodic Table is based on

1 mass of the atom

2 atomic number

3 shapes of the atom

4 electronegegativity

AIIMS-1994

Classification of Elements and Periodicity in Properties

89390 The stability of ferric ion is due to :

1 half filled

f

- orbitals

2 half filled d- orbitals

3 completely filled f-orbitals

4 completely filled d- orbitals

Explanation:

Ferric ion ${Fe}^{3 +}$ has half filled d-orbital. The electronic configuration of irons is $(Ar) 3 d^{6} 4 s^{2}$ . So, when we say ferric it mean iron loses three electrons, that is it loses two electron from $2 s$ -orbitals and one electron from $3 d$ orbitals. Therefore, ferric ion has $d -$ orbital is filled by 5 electrons that is half filled and half filled orbitals are stable.

BCECE-2006

Classification of Elements and Periodicity in Properties

89339 Given below are two statements:
One is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) Metallic character decreases and non-metallic character increases on moving from left to right in a period.
Reason (R) It is due to increase in ionisation enthalpy and decrease in electron gain enthalpy, when one moves from left to right in a period.
In the light of the above statements, choose the most appropriate answer from the options given below.

1 (A) is false but (R) is true

2 (A) is true but (R) is false

3 Both (A) and (R) are correct and (R) is the correct explanation of (A)

4 Both (A) and (R) are correct but (R) is not the correct explanation of (A)

(JEE Main 2021

Classification of Elements and Periodicity in Properties

89409 In the periodic table from left to right in a period, the atomic volume
3. Atomic and Ionic Radii

1 decrease

2 increase

3 remains same

4 first decrease then increase

NEET-1993

Classification of Elements and Periodicity in Properties

89408 In the periodic table from left to right in a period, the atomic volume
3. Atomic and Ionic Radii

1 decrease

2 increase

3 remains same

4 first decrease then increase

NEET-1993

Classification of Elements and Periodicity in Properties

89338 The long form of periodic Table is based on

1 mass of the atom

2 atomic number

3 shapes of the atom

4 electronegegativity

AIIMS-1994

Classification of Elements and Periodicity in Properties

89390 The stability of ferric ion is due to :

1 half filled

f

- orbitals

2 half filled d- orbitals

3 completely filled f-orbitals

4 completely filled d- orbitals

Explanation:

Ferric ion ${Fe}^{3 +}$ has half filled d-orbital. The electronic configuration of irons is $(Ar) 3 d^{6} 4 s^{2}$ . So, when we say ferric it mean iron loses three electrons, that is it loses two electron from $2 s$ -orbitals and one electron from $3 d$ orbitals. Therefore, ferric ion has $d -$ orbital is filled by 5 electrons that is half filled and half filled orbitals are stable.

BCECE-2006

Classification of Elements and Periodicity in Properties

89339 Given below are two statements:
One is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) Metallic character decreases and non-metallic character increases on moving from left to right in a period.
Reason (R) It is due to increase in ionisation enthalpy and decrease in electron gain enthalpy, when one moves from left to right in a period.
In the light of the above statements, choose the most appropriate answer from the options given below.

1 (A) is false but (R) is true

2 (A) is true but (R) is false

3 Both (A) and (R) are correct and (R) is the correct explanation of (A)

4 Both (A) and (R) are correct but (R) is not the correct explanation of (A)

(JEE Main 2021

Classification of Elements and Periodicity in Properties

89409 In the periodic table from left to right in a period, the atomic volume
3. Atomic and Ionic Radii

1 decrease

2 increase

3 remains same

4 first decrease then increase

NEET-1993

Classification of Elements and Periodicity in Properties

89408 In the periodic table from left to right in a period, the atomic volume
3. Atomic and Ionic Radii

1 decrease

2 increase

3 remains same

4 first decrease then increase

NEET-1993

Classification of Elements and Periodicity in Properties

89338 The long form of periodic Table is based on

1 mass of the atom

2 atomic number

3 shapes of the atom

4 electronegegativity

AIIMS-1994

Classification of Elements and Periodicity in Properties

89390 The stability of ferric ion is due to :

1 half filled

f

- orbitals

2 half filled d- orbitals

3 completely filled f-orbitals

4 completely filled d- orbitals

Explanation:

Ferric ion ${Fe}^{3 +}$ has half filled d-orbital. The electronic configuration of irons is $(Ar) 3 d^{6} 4 s^{2}$ . So, when we say ferric it mean iron loses three electrons, that is it loses two electron from $2 s$ -orbitals and one electron from $3 d$ orbitals. Therefore, ferric ion has $d -$ orbital is filled by 5 electrons that is half filled and half filled orbitals are stable.

BCECE-2006

Classification of Elements and Periodicity in Properties

89339 Given below are two statements:
One is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) Metallic character decreases and non-metallic character increases on moving from left to right in a period.
Reason (R) It is due to increase in ionisation enthalpy and decrease in electron gain enthalpy, when one moves from left to right in a period.
In the light of the above statements, choose the most appropriate answer from the options given below.

1 (A) is false but (R) is true

2 (A) is true but (R) is false

3 Both (A) and (R) are correct and (R) is the correct explanation of (A)

4 Both (A) and (R) are correct but (R) is not the correct explanation of (A)

(JEE Main 2021

Classification of Elements and Periodicity in Properties

89409 In the periodic table from left to right in a period, the atomic volume
3. Atomic and Ionic Radii

1 decrease

2 increase

3 remains same

4 first decrease then increase

NEET-1993

Classification of Elements and Periodicity in Properties

89408 In the periodic table from left to right in a period, the atomic volume
3. Atomic and Ionic Radii

1 decrease

2 increase

3 remains same

4 first decrease then increase

NEET-1993

Classification of Elements and Periodicity in Properties

89338 The long form of periodic Table is based on

1 mass of the atom

2 atomic number

3 shapes of the atom

4 electronegegativity

AIIMS-1994

Classification of Elements and Periodicity in Properties

89390 The stability of ferric ion is due to :

1 half filled

f

- orbitals

2 half filled d- orbitals

3 completely filled f-orbitals

4 completely filled d- orbitals

Explanation:

Ferric ion ${Fe}^{3 +}$ has half filled d-orbital. The electronic configuration of irons is $(Ar) 3 d^{6} 4 s^{2}$ . So, when we say ferric it mean iron loses three electrons, that is it loses two electron from $2 s$ -orbitals and one electron from $3 d$ orbitals. Therefore, ferric ion has $d -$ orbital is filled by 5 electrons that is half filled and half filled orbitals are stable.

BCECE-2006

Classification of Elements and Periodicity in Properties

89339 Given below are two statements:
One is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) Metallic character decreases and non-metallic character increases on moving from left to right in a period.
Reason (R) It is due to increase in ionisation enthalpy and decrease in electron gain enthalpy, when one moves from left to right in a period.
In the light of the above statements, choose the most appropriate answer from the options given below.

1 (A) is false but (R) is true

2 (A) is true but (R) is false

3 Both (A) and (R) are correct and (R) is the correct explanation of (A)

4 Both (A) and (R) are correct but (R) is not the correct explanation of (A)

(JEE Main 2021