Polarisability and Fajan's Rule

Q. In the case of alkali metal halides, the covalent character decreases in the order:

1. $MF>MCl>MI>MBr$
2. $MI>MBr>MCl>MF$
3. $MCl>MI>MBr>MF$
4. $MF>MCl>MBr>MI$

Q.

What is the hydration enthalpy of alkali metals?

Q. Increasing order of covalent character in NaF, NaCl, NaBr & NaI

Q. The correct sequence of increasing covalent character is represented by:

1. $NaCl<LiCl<BeC{l}_2$
2. $LiCl<NaCl<BeC{l}_2$
3. $BeC{l}_2<LiCl<NaCl$
4. $BeC{l}_2<NaCl<LiCl$

Q. The correct order of polarizability is $I^{-},B{r}^{-},C{l}^{-},F^{-}$

1. $I^{-}>B{r}^{-}>C{l}^{-}>F^{-}$
2. $I^{-}>B{r}^{-}=C{l}^{-}>F^{-}$
3. $I^{-}=B{r}^{-}=C{l}^{-}>F^{-}$
4. $I^{-}=B{r}^{-}=F^{-}<C{l}^{-}$

Q. The correct order of lattice energy order is:

1. $LiF>LiCl>LiBr>LiI$
2. $LiCl>LiF>LiBr>LiI$
3. $LiBr>LiCl>LiF>LiI$
4. $LiI>LiBr>LiCl>LiF$

Q. Select the correct statement(s).
(i) Polarizability of $S^{2-}$ is lesser than $S{e}^{2-}$
(ii) Polarizability of $S^{2-}$ is higher than $C{l}^{-}$
(iii) polarizability of $S^{2-}$ is lesser than $P^{3-}$
(iv) Polarizability of $O^{2-}$ is higher than $S^{2-}$

1. I, II, and III
2. I and II
3. II and IV
4. None of these

Q.

Identify the smallest ion among the following:

1. ${\mathrm{Al}}^{3+}$

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

3. ${\mathrm{Ba}}^{2+}$

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

Q.

Which one of the following alkali metals gives hydrated salts?

1. $\mathrm{K}$

2. $\mathrm{Li}$

3. $\mathrm{Na}$

4. $\mathrm{Cs}$

Q. Arrange the following in increasing order of covalent character.
$NaCl,MgC{l}_2,AlC{l}_3$

Q. $AlC{l}_3$ is covalent while $Al{F}_3$ is ionic. This can be justified on the basis of:

1. Valence-bond theory
2. Fajan's rule
3. Molecular-orbital theory
4. Hydration energy

Q.

How do you know Which Bond is more Covalent ?

Q. Which of the following alkali metals give nitride on reacting with nitrogen?

1. $Li$
2. $Na$
3. $K$
4. $Rb$

Q. Which of the following compounds has the maximum covalent character?

1. $NaCl$
2. $SiC{l}_4$
3. $AlC{l}_3$
4. $MgC{l}_2$

Q.

Explain with the help of suitable example polar covalent bond.

Q. Which of the following combinations of ions will have the highest polarisation?

1. $F{e}^{2+},B{r}^{-}$
2. $N{i}^{4+},B{r}^{-}$
3. $N{i}^{2+},B{r}^{-}$
4. $Fe,B{r}^{-}$

Q.

Copper forms two Chlorides $\mathrm{CuCl}$ and ${\mathrm{CuCl}}_2$ (1) Identify the Copper ions in these compounds? (2) What is the valency of Copper in each of these compounds? (3) By writing the sub-shell electronic configuration of Copper, find out a sub-shells from which the electrons are lost to form these ions. (4) Write the period and group to which Copper belongs. (Hint: Atomic number of Copper $=29$)

Q.

Can Phosphorus conduct electricity?

Q.

‘Rule of thumb’ refers to _______.

1. Adopting a hit-and-trial approach to resolve management problems

2. Use of personal judgment in handling management issues

3. Both of the above

4. None of the above

Q. Which of the following sequences represents the increasing order of the polarizing power of the cationic species?

1. $M{g}^{2+}<B{e}^{2+}<K^{+}<C{a}^{2+}$
2. $B{e}^{2+}<K^{+}<M{g}^{2+}<C{a}^{2+}$
3. $C{a}^{2+}<K^{+}<B{e}^{2+}<M{g}^{2+}$
4. $K^{+}<C{a}^{2+}<M{g}^{2+}<B{e}^{2+}$

Q. The ionic conductance of which of the following is the highest?

1. $L{i}_{\left(aq\right)}^{+}$
2. $N{a}_{\left(aq\right)}^{+}$
3. $C{s}_{\left(aq\right)}^{+}$
4. $K_{\left(aq\right)}^{+}$

Q. In normal spinel structure there is a closed packed array of O2- ions. The trivalent cations are present in 1) 50% of octahedra Voids 2)75% of octahedral Voids 3)12.5% of tetrahedral Voids 4) 25% of octahedral Voids And What is spinel Structure??

Q.

Name one solvent in which most of the ionic compounds dissolve.

Q. The order of covalent bond character for $LiCl,BeC{l}_2,BC{l}_3$ and $CC{l}_4$ is:

1. $LiCl>BeC{l}_2>BC{l}_3>CC{l}_4$
2. $LiCl<BeC{l}_2<BC{l}_3<CC{l}_4$
3. $LiCl>BeC{l}_2>CC{l}_4>BC{l}_3$
4. $BeC{l}_2>LiCl>BC{l}_3>CC{l}_4$

Q.

KCl has higher melting point than AgCl. Why?

[$r_{A{g}^{+}}$ $\approx$ $r_{K^{+}}$]

1. Cation size

2. Pseudo noble gas cation

3. Cation charge

4. Anion size

Q.

Is ${\mathrm{ICl}}_2$- nonpolar or polar?

Q.

Sulfur Is Soluble In ____ ?

1. Water

2. Ether

3. Alcohol

4. Carbon disulphide

Q. The bond order in No. is 2.5 while that in $N{O}^{+}$ is 3. Which of the following statements is true for these two species?

1. Bond length is is equal to that in NO

2. Bond length is NO is greater that in NO⁺

3. Bond length in NO⁺ is greater that in NO

4. Bond length is unpredictable

Q. The decreasing order of solubility of silver halides is:

1. $AgI>AgBr>AgCl>AgF$
2. $AgF>AgCl>AgBr>AgI$
3. $AgCl>AgF>AgBr>AgI$
4. $AgBr>AgF>AgI>AgCl$

Q.

Phenomenon of existence of two or more substances having the same molecular formulae but different structural or special arrangements is:

1. Ionization

2. Covalency

3. Isomerism

4. Bonding