Stability of Fully Filled and Half Filled Orbitals

Q.

What do you mean by Exchange Energy?

Q.

Write the electronic configuration of copper.

Q.

explain why atoms with half filled and completely filles configuration are extra stable

Q.

The complex ion which has no d-electron in the central metal atom is

1. [Fe(CN)₆]^3-

2. [Co(NH₃)₆]³⁺

3. [Cr(H₂O)₆]³⁺

4. [MnO₄]^-

Q.

The first IE of Na, Mg and Si are respectively 496, 737, 786 KJ/mol. The IE of Al will be closer to

A) 760 KJ/mol. B) 575 KJ/mol. C) 801 KJ/mol. D) 419 KJ/mol.

Explain in detail.

Q. Out of H2+ and H2- which one is more stable and why though the B.O. is same

Q. why Lithium has largest size ion in aqueous solution( even greater than Cs ) Cs ion has 4 additional shells as compared to Li ion and also more number of neutrons and protons , so Cs should have larger size (and least mobility in water)

Q.

Lithium has higher ionization energy than sodium.

1. True
2. False

Q.

What do you mean by the statement, " the d orbitals of the transition element project to the periphery of an atom more than the other orbital. Hence, they are more influenced by the surrounding as well as affecting the atoms or molecules surrounding them."?

Q.

The correct electronic configuration and spin-only magnetic moment ($\mathrm{BM}$) of ${\mathrm{Gd}}^{3+}$ (Z = 64) respectively, are:

1. $\left[\mathrm{Xe}\right]5{\mathrm{f}}^7\mathrm{and}7.9$

2. $\left[\mathrm{Xe}\right]4{\mathrm{f}}^7\mathrm{and}7.9$

3. $\left[\mathrm{Xe}\right]5{\mathrm{f}}^7\mathrm{and}8.9$

4. $\left[\mathrm{Xe}\right]4{\mathrm{f}}^7\mathrm{and}8.9$

Q. The electronic configuration of an element is $1s^2,2s^2,2p^6,3s^2,3p^6,3d^5,4s^1$. This represents its

1. Excited state
2. Ground state
3. Cationic form
4. Anionic form

Q.

The correct ground state electronic configuration of chromium atom is

1. 

2. 

3. 

4. 

Q. Supposing the energy of 4th shell for H atom is -50 a.u.(arbitary unit) What would be its ionisation potential A.50 B.800 C.15.4 D.20.8

Q.

Which of the following is the correct sequence for atomic radii

1. Al³⁺ > Na⁺ >Cl^-
2. Na⁺ > Al³⁺ >Cl^-
3. Al³⁺ > Cl^- > Na⁺
4. Cl^- > Na⁺ > Al³⁺

Q. Deuterium resembles hydrogen in chemical properties but:

1. React vigorously than hydrogen
2. Reacts slower than hydrogen
3. Emits ${\beta }^{+}$ particles
4. Reacts just as hydrogen

Q. 3 moles of metal complex with formula $Co(en{)}_{2}C{l}_3$ gives 3 moles of silver chloride on treatment with excess of silver nitrate. The secondary valency of $Co$ in the complex is ______. (Round off to the Nearest integer).
​​​​​​​

Q. Assertion:Low spin tetrahedral complexes are rarely observed. Reason:The orbital splitting energies are not sufficiently large to force pairing.

Q. The correct ground state electronic configuration of chromium atom is:

1. $\left[Ar\right]3d^{5}4s^1$
2. $\left[Ar\right]3d^{4}4s^2$
3. $\left[Ar\right]3d^{6}4s^0$
4. $\left[Ar\right]4d^{5}4s^1$

Q. The maximum no. of electrons in a subshell with l = 2 and n = 3 is :

1. $12$
2. $6$
3. $2$
4. $10$

Q.

(i) Write the electronic configurations of the following ions: (a) H^– (b) Na⁺ (c) O^2–(d) F^–

(ii) What are the atomic numbers of elements whose outermost electrons are represented by (a) 3s¹ (b) 2p³ and (c) 3p⁵?

(iii) Which atoms are indicated by the following configurations?

(a) [He] 2s¹ (b) [Ne] 3s² 3p³ (c) [Ar] 4s² 3d¹.

Q. Assertion:
Atoms with completely filled and half filled subshells are stable.

Reason:
Completely filled and half-filled subshells have the symmetrical distribution of electrons and have maximum exchange energy.

1. Both assertion and reason are correct and reason is the correct explaination of assertion.
2. Both assertion and reason are correct but reason is not the correct explaination of assertion.
3. Assertion is correct but reason is incorrect.
4. Assertion is incorrect but reason is correct.

Q. Write the electronic configuration of chromium (Cr).

Q.

Identify the cations and anions in the following compounds

• ${\mathrm{CH}}_3\mathrm{COONa}$
• ${\mathrm{NH}}_3$
• ${\mathrm{NH}}_4\mathrm{Cl}$
• ${\mathrm{AlSO}}_{4_{}}$

Q.

Name the anion having three units of negative charge.

Q. Low spin complex of $d^6$-cation in an octahedral field will have the following energy:
(${\Delta }_0=$ Crystal field splitting energy in an octahedral field, $P=$ Electron pairing energy)

1. $\frac{-12}{5}{\Delta }_0+3P$
2. $\frac{-2}{5}{\Delta }_0+2P$
3. $\frac{-12}{5}{\Delta }_0+P$
4. $\frac{-2}{5}{\Delta }_0+P$

Q.

The energy of an electron present in the first orbit of an atom is ____ than the energy of an electron in the other orbitals.

Q.

Zinc is ________ in the activity series than copper.

Q. Electronic configuration In case of 4s and 3d which would be written first?

Q.

Write the ground-state electronic configuration of the following transition elements ${\mathrm{V}}^{5+},{\mathrm{Au}}^{3+}\&{\mathrm{Fe}}^{2+}$

Q. Why does orbitals having maximum number of unpaired electrons have more stability ?