Lanthanides Electronic Configuration

Q.

What is the color of iodine?

Q.

What is the electron configuration of ${\mathrm{Au}}^{+}$?

Q.

What are the four different verb forms of "drink"?

Q. Which of the following d-block elements has half-filled penultimate as well as valence subshell?

1. Cu
2. Au
3. Ag
4. Cr

Q.

The electronic configuration of ${\mathrm{Mn}}^{2+}$ is

Q.

The element in which electrons are progressively filled in 4f - orbital are called
(a) actinoids (b) transition elements (c) Lanthanoids (d) halogens

Q. The spin only magnetic moment value of $B_2^{+}$ species is $x\times {10}^{-2}B.M.$.
[Given $:\sqrt{3}=1.73$] x is : (Nearest integer)

Q. The temperature of an ideal gas increases in an:

1. Adiabatic expansion
2. Isothermal expansion
3. Adiabatic compression
4. Isothermal compression

Q. Which of the following statement(s) is/are correct regarding reversible adiabatic and isothermal process for an ideal gas, starting from the same initial state to the same final volume?

1. In expansion, more work is done by the gas in isothermal process.
2. In compression, more work is done on the gas in adiabatice process.
3. In expansion, the final temperature of gas will be higher in isothermal process.
4. In compression, the final temperature of gas will be higher in adiabatiic process.

Q.

Dacron is a polymer of ?

1. Glycol and Phenol

2. Glycol and Terephthalic acid

3. Glycol and Formaldehyde

4. Glycol and Phthalic acid

Q. Assertion: $C{e}^{4+}$ is used as an oxidizing agent in volumetric analysis.
Reason: $C{e}^{4+}$ has a tendency to attain its $+3$ oxidation state.

1. Both (A) and (R) are correct and (R) is the correct explanation of (A)
2. Both (A) and (R) are correct and (R) is not the correct explanation of (A)
3. (A) is correct, but (R) is incorrect
4. (A) is incorrect , but (R) is correct

Q. Gadolinium belongs to 4f series. Its atomic number is 64. Which of the following is the correct electronic configuration of gadolinium?

1. $\left[Xe\right]4f^{9}5s^1$
2. $\left[Xe\right]4f^{7}5d^{1}6s^2$
3. $\left[Xe\right]4f^{6}5d^{2}6s^2$
4. $\left[Xe\right]4f^{8}6d^2$

Q. How many electrons are there in $f$ subshell of $Np(Z=93)$ in ground state electronic configuration

1. $18$
2. $4$
3. $7$
4. $14$

Q. Assertion: Separation of Zr and Hf is difficult.
Reason: Because Zr and Hf lie in the same group of the periodic table.

1. Both assertion and reason are true, and reason is the correct explanation of the assertion.
2. Both assertion and reason are true but reason is not the correct explanation of assertion.
3. Assertion is not true but reason is true.
4. Both assertion and reason are false.

Q. The pair of atomic numbers which represents the p-block elements

1. 6, 12
2. 7, 53
3. 38, 51
4. 19, 35

Q.

How it can be proved that the basic structure of the Modem Periodic Table is based on the electronic configuration of atoms of different elements?

Q. Which one of the following statements related to lanthanons is incorrect ?

1. Europium shows $+2$ oxidation state
2. The basicity of hydroxides increases as the ionic radius decreases from $Ce$ to $Lu$
3. In lanthanons $4f$ electrons do not participate in bonding
4. $Ce(+4)$ solution are widely used as oxidizing agent in volumetric analysis

Q.

Which Subshell is represented by the lanthanides series?

Q. The electronic configurations of Eu (Atomic No. 63), Gd (Atomic No. 64) and Tb (Atomic No. 65) are

1. $\left[Xe\right]4f^{6}5d^{1}6s^2,\left[Xe\right]4f^{7}5d^{1}6s^{2}and\left[Xe\right]4f^{8}5d^{1}6s^2$
2. $\left[Xe\right]4f^{7}6s^2,\left[Xe\right]4f^{7}5d^{1}6s^{2}and\left[Xe\right]4f^{9}6s^2$
3. $\left[Xe\right]4f^{7}6s^2,\left[Xe\right]4f^{8}6s^{2}and\left[Xe\right]4f^{8}5d^{1}6s^2$
4. $\left[Xe\right]4f^{6}5d^{1}6s^2,\left[Xe\right]4f^{7}5d^{1}6s^{2}and\left[Xe\right]4f^{9}6s^2$

Q.

$4{\mathrm{s}}^{2}4{\mathrm{p}}^1$ Identify the element that is diagonally a part of the next period in $p$-block.

1. $\mathrm{Ge}$

2. $\mathrm{Sn}$

3. $\mathrm{In}$

4. $\mathrm{Pb}$

Q.

Meenas father is Arun.Then Arun is the ________of Meenas father. English

Q. The outer electronic configuration of Gd (Atomic No: 64) is:

1. 4f³ 4d⁵ 6s²
2. 4f⁸ 5d⁰ 6s²
3. 4f⁴ 5d⁴ 6s²
4. 4f⁷ 5d¹ 6s²

Q. Assertion: $La$ should be a f-block element according to Aufbau principle
Reason: The 57th electron enters into the 5d –orbital

1. Both (A) and (R) are correct and (R) is the correct explanation of (A)
2. Both (A) and (R) are correct and (R) is not the correct explanation of (A)
3. (A) is correct, but (R) is incorrect
4. (A) is incorrect , but (R) is correct

Q. For the $t_{2g}^6{e}_g^2$ system, the value of magnetic moment $\left(\mu \right)$ is

1. $2.83B.M.$
2. $1.73B.M.$
3. $3.87B.M.$
4. $4.92B.M.$

Q. What is meant by shielding effect?

Q.

Which of the following lanthanoid ions are coloured?

${\mathrm{Lu}}^{+3}$

${\mathrm{Pm}}^{+3}$

${\mathrm{Sm}}^{+3}$

${\mathrm{Eu}}^{+3}$

1. ${\mathrm{Lu}}^{+3},{\mathrm{Pm}}^{+3},{\mathrm{Sm}}^{+3}$

2. ${\mathrm{Pm}}^{+3},{\mathrm{Sm}}^{+3},{\mathrm{Eu}}^{+3}$

3. ${\mathrm{Lu}}^{+3},{\mathrm{Pm}}^{+3},{\mathrm{Sn}}^{+3}$

4. ${\mathrm{Lu}}^{+3},{\mathrm{Sm}}^{+3},{\mathrm{Eu}}^{+3}$

Q. Gadolinium (Gd) has a $4f^{7}5d^{1}6s^2$ electronic configuration outside the [Xe] core. Find the spin only magnetic moment of $G{d}^{3+}$.

1. $\sqrt{63}B.M$
2. $\sqrt{35}B.M$
3. $\sqrt{48}B.M$
4. $\sqrt{24}B.M$

Q.

Magnetic moment $\mu =\sqrt{15}B.M.$ is the true for the pair:

1. $C{o}^{2+},C{r}^{3+}$

2. $F{e}^{2+},C{r}^{+3}$

3. $F{e}^{+3},F{e}^{+2}$

4. $M{n}^{+2},F{e}^{+2}$

Q.

Metal posses two types of valency- Primary (ionizable) and secondary (non-ionizable) is the postulate of

1. Rutherford

2. Pauling

3. Mendeleves

4. Werner

Q. Assertion: $C{e}^{4+}$ is used as an oxidizing agent in volumetric analysis.
Reason: $C{e}^{4+}$ has a tendency to attain its $+3$ oxidation state.

1. Both (A) and (R) are correct and (R) is the correct explanation of (A)
2. (A) is correct, but (R) is incorrect
3. Both (A) and (R) are correct and (R) is not the correct explanation of (A)
4. (A) is incorrect , but (R) is correct