Anionic Radius

Q.

Which of the following is the smallest in size?

1. O^2-

2. C^4-

3. F^-

4. N^3-

Q.

Define hydrated radius?

Q.

The radii of $F,F^{-},O$ and $O^{2-}$ are in the order of

1. O^2->F^->O>F

2. O^2->F^->F>O

3. F^->O^2->F>O

4. O^2->O>F^->F

Q.

Which is the correct order for ionic radii?

1. 

2. 

3. 

4. None of the above

Q.

Compare the radii of two species X and Y. Give reasons for your answer.

(a) X has 12 protons and 12 electrons (b) Y has 12 protons and 10 electrons

Q.

Which of the following ion has the greatest radius?

1. H^-

2. Br^-

3. F^-

4. I^-

Q.

Which of the following statements are not true.

1. Down the group the electronegativity decreases.
2. In a period, electronegativity decreases on moving from left to right.
3. Electronegativity decreases with increase in size.
4. Electronegativity decreases with the decrease in ionisation energy.

Q.

Which of the following species has the largest radius?

1. ${\mathrm{O}}^{-2}$

2. ${\mathrm{F}}^{-}$

3. ${\mathrm{Na}}^{+}$

4. ${\mathrm{Mg}}^{+2}$

Q. Arrange the following as stated :
Increasing order of ionic size
$N^{3-},N{a}^{+},F^{-},O^{2-},M{g}^{2+}$

1. $M{g}^{2+}<Na<F^{-}<O^{2-}<N^{3-}$.
2. None of these
3. $Na<M{g}^{2+}<F^{-}<O^{2-}<N^{3-}$.
4. $O^{2-}<Na<F^{-}<M{g}^{2+}<N^{3-}$.

Q.

The electronic configurations of four particles A, B, C and D are given below:
$$\begin{array}{cc}A& 2,8,8\\ B& 2,8,2\\ C& 2,6\\ D& 2,8\end{array}$$
(i) magniesium atom? (i) oxygen atom?
(iii) sodium ion? (iv) chloride ion?

Q.

The ionic radii (in $A^{\circ }$ of $N^3,O^{2-}and{F}^{-}$ respectively are

1. 1.71, 1.36 and 1.40

2. 1.36, 1.40 and 1.71

3. 1.36, 1.71 and 1.40

4. 1.71, 1.40 and 1.36

Q. Correct order of radius of first orbit of $H,H{e}^{+},L{i}^{2+},B{e}^{3+}$ is $H<H{e}^{+}<L{i}^{2+}<B{e}^{3+}$.

1. True
2. False

Q. Which ion has the largest ionic radius?

1. ${Cl}^{-}$
2. ${Na}^{+}$
3. $P^{3-}$
4. ${Mg}^{2+}$

Q. Which among the following has the highest ionic radius ?

1. $F^{-}$
2. $O^{2-}$
3. $B^{3+}$
4. $L{i}^{+}$

Q. In which of the following crystals of ionic compounds would you expect maximum distance between the centres of cations and anions?

1. CsF
2. LiF
3. CsI
4. LiI

Q. $K^{+},{Cl}^{-},{Ca}^{2+},S^{2-}$ ions are isoelectronics. The decreasing order of their size is:

1. $S^{2-}>{Cl}^{-}>K^{+}>{Ca}^{2+}$
2. ${Ca}^{2+}>K^{+}>{Cl}^{-}>S^{2-}$
3. $K^{+}>{Cl}^{-}>{Ca}^{2+}>S^{2-}$
4. ${Cl}^{-}>S^{2-}>{Ca}^{2+}>K^{+}$

Q. Which ion has the smallest ionic radius?

1. ${Li}^{+}$
2. $B^{3+}$
3. $N^{3-}$
4. $O^{2-}$

Q. There are ${10}^6$ radioactive nuclei in a given radioactive element. Its half life is $20$ seconds. How many nuclei will remain after $10$ seconds? (Given, $\sqrt{2}=1.41$)

Q. Which ion has the largest radius from the following ions?

1. $S{i}^{4+}$
2. $A{l}^{3+}$
3. $N{a}^{+}$
4. $M{g}^{2+}$

Q. Arrange the following species in order of increasing size.
$Ar,K^{+},C{l}^{-},S^{2-},C{a}^{2+}$

1. $C{a}^{2+}<K^{+}<Ar<C{l}^{-}<S^{2-}$
2. None of these
3. $C{a}^{2+}<K^{+}<Ar<S^{2-}<C{l}^{-}$
4. $C{a}^{2+}<Ar<K^{+}<C{l}^{-}<S^{2-}$

Q. Among the following which have the largest ionic radii?

1. $F^{-}$
2. $O^{-2}$
3. ${Na}^{+}$
4. ${Al}^{+3}$
5. ${Mg}^{+2}$

Q.

$\text{Electron gain enthalpy}\alpha \frac{1}{Atomicsize}$.

1. True

2. False

Q.

Which of the following orders of ionic radii is correctly represented?

1. $H^{-}>H^{+}>H$

2. $A{l}^{3+}>M{g}^{2+}>N^{3-}$

3. $N{a}^{+}>F^{-}>O^{2-}$

4. $0^{2-}>F^{-}>N{a}^{+}$

Q. Consider the isoelectronic series:
$K^{+},S^{2-},C{l}^{-}$ and $C{a}^{2+}$, the radii of the ions decrease as:

1. $C{a}^{2+}>K^{+}>C{l}^{-}>S^2$
2. $C{l}^{-}>S^2>K^{+}>C{a}^{2+}$
3. $S^2>C{l}^{-}>K^{+}>C{a}^{2+}$
4. $K^{+}>C{a}^{2+}>S^2>C{l}^{-}$

Q. Arrange the following in the increasing order of ionic size.
$N^{3-},N{a}^{+},F^{-},O^{2-},M{g}^{2+}$

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

Q.

Match list-I with list-II and select the correct answer using the codes given below -

List-I List-II

Ion Radius (in pm)

(I) $L{i}^{+}$ (a) 216

(II) $N{a}^{+}$ (b) 195

(III) $B{r}^{-}$ (c) 60

(IV) $I^{-}$ (d) 95

1. ib, iic, iiia, ivd

2. ic, iid, iiib, iva

3. id, iic, iiib, iva

4. Ia, IIb, IIId, IVc

Q. The correct order of increasing size is:

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

Q. Which one of the following is the correct order of the size of the ions ?

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

Q. $C{a}^{2+}$ has a smaller ionic radius than $K^{+}$ because it has a ____ z/e ratio.

1. lower
2. higher
3. equal
4. none

Q.

The correct order of radii is

1. Be> N>B

2. $N^{3\ominus }>O^{2\ominus }>F^{\ominus }$

3. Na>Li>K

4. $F{e}^{++}>F{e}^{3+}>F{e}^{2+}$