Atomic Size and Electronegativity

Q. Calculate the electronegativity of carbon from the following data:
Bond energy of H-H bond $E_{H-H}=104.2kcalmo{l}^{-1}$
Bond energy of C-C bond $E_{C-C}=83.1kcalmo{l}^{-1}$
Bond energy of C-H bond $E_{C-H}=98.8kcalmo{l}^{-l}$
Electronegativity of Hydrogen $X_H=\mathrm{2.1.}$

1. -3.75
2. 3.75
3. 2.59
4. -2.59

Q. How many of the following cannot be hydrolyzed?
$N{F}_3,P{F}_3,NC{l}_3,AsC{l}_3,SbC{l}_3,BiC{l}_3$

1. 2
2. 3
3. 4
4. 5

Q. Which of the following have no unit?

1. Electronegativity
2. Electron Gain Enthalpy
3. Ionisation Energy
4. Metallic Character

Q. Arrange the following in increasing order of their size: Be, Ca, Ba, Sr.

1. $Ca<Ba<Be<Sr$
2. $Be<Sr<Ba<Ca$
3. $Be<Ca<Sr<Ba$
4. $Ba<Sr<Ca<Be$

Q. Calculate the electronegativity of carbon from the following data:
Bond energy of H-H bond $E_{H-H}=104.2kcalmo{l}^{-1}$
Bond energy of C-C bond $E_{C-C}=83.1kcalmo{l}^{-1}$
Bond energy of C-H bond $E_{C-H}=98.8kcalmo{l}^{-l}$
Electronegativity of Hydrogen $X_H=\mathrm{2.1.}$

1. 2.59
2. -2.59
3. -3.75
4. 3.75

Q. The ionisation enthalpies of atoms A and B are $200$ and $300kcalmo{l}^{-l}$ respectively. The electron gain enthalpies of these atoms are $80.0$ and $85.0kcalmo{l}^{-l}$ respectively. Which of the atoms has higher electronegativity?

1. A
2. B
3. Both have same electronegativity
4. Can't be predicted

Q. For which of the following molecules $p\pi -p\pi$ bonding is not possible under ordinary conditions.
Nitrogen, Phosphorus, Arsenic and Antimony.

1. Nitrogen, Phosphorus
2. Nitrogen and antimony
3. Phosphorus, arsenic and antimony
4. only phosphorus and arsenic

Q. Which of the following have no unit?

1. Electronegativity
2. Electron Gain Enthalpy
3. Ionisation Energy
4. Metallic Character

Q. Size of the following isoelectronic species increase in the order:

1. $M{g}^{2+}<N{a}^{+}<F^{-}$
2. $F^{-}<N{a}^{+}<M{g}^{2+}$
3. $F^{-}<M{g}^{2+}<N{a}^{+}$
4. $M{g}^{2+}<F^{-}<N{a}^{+}$

Q. For which of the following molecules $p\pi -p\pi$ bonding is not possible under ordinary conditions.
Nitrogen, Phosphorus, Arsenic and Antimony.

1. Nitrogen, Phosphorus
2. Phosphorus, arsenic and antimony
3. Nitrogen and antimony
4. only phosphorus and arsenic

Q. For which of the following molecules $p\pi -p\pi$ bonding is not possible under ordinary conditions.
Nitrogen, Phosphorus, Arsenic and Antimony.

1. Nitrogen, Phosphorus
2. Phosphorus, arsenic and antimony
3. Nitrogen and antimony
4. only phosphorus and arsenic

Q. Calculate the electronegativity of carbon from the following data:
Bond energy of H-H bond $E_{H-H}=104.2kcalmo{l}^{-1}$
Bond energy of C-C bond $E_{C-C}=83.1kcalmo{l}^{-1}$
Bond energy of C-H bond $E_{C-H}=98.8kcalmo{l}^{-l}$
Electronegativity of Hydrogen $X_H=\mathrm{2.1.}$

1. 3.75
2. -3.75
3. 2.59
4. -2.59

Q. In the atomic volume vs atomic weight of the elements graph, which of the following element occupies the peak position on the curve?

1. $K$
2. $Ca$
3. $Mn$
4. $Cl$

Q. Element $Hg$ has two oxidation states $H{g}^{1+}$ & $H{g}^{2+}$, the correct order of radii of these ions?

1. $H{g}^{+1}<H{g}^{2+}$
2. $H{g}^{1+}>H{g}^{2+}$
3. $H{g}^{1+}=H{g}^{2+}$
4. $H{g}^{1+}\le H{g}^{2+}$