Central Atom and Ligands

Q. Order of boiling point and density for alkali metals Explain

Q. in clf3, if the two lone pairs are placed at the axial positions, there will be least lone pair lone pair repulsion. in a molecule, the strongest repulsions are those which exist between TWO LONE PAIRS(since lp-lp repulsion>lp-bp repulsion). therefore considering stability, the structure having the 2 LONE PAIRS placed farthest apart should be most stable. why is the structure of clf3 t shaped then.

Q. According to Kohlrausch law, the limiting value of molar conductivity of an strong electrolyte $A_{2}B$ is given by:

1. $\frac{1}{2}{\lambda }_{A^{+}}^0+{\lambda }_{B^{2-}}^0$
2. ${\lambda }_{A^{+}}^0+2{\lambda }_{B^{2-}}^0$
3. ${\lambda }_{A^{+}}^0+{\lambda }_{B^{2-}}^0$
4. $2{\lambda }_{A^{+}}^0+{\lambda }_{B^{2-}}^0$

Q. The pink colour of lithium chloride crystal is due to:

1. Frenkel defect
2. Metal deficiency defect
3. Metal excess defect
4. Impurity defect

Q. According to Kohlrausch law, the limiting value of molar conductivity of an electrolyte $F{e}_2(S{O}_4{)}_3$ is given by:

1. ${\lambda }_m^0\left(F{e}^{3+}\right)+{\lambda }_m^0\left(S{O}_4^{2-}\right)$
2. $\frac{2{\lambda }_m^0\left(F{e}^{3+}\right)+3{\lambda }_m^0\left(S{O}_4^{2-}\right)}{6}$
3. $2{\lambda }_m^0\left(F{e}^{3+}\right)+3{\lambda }_m^0\left(S{O}_4^{2-}\right)$
4. $3{\lambda }_m^0\left(F{e}^{3+}\right)+2{\lambda }_m^0\left(S{O}_4^{2-}\right)$

Q. In which of the following is oxidation number fractional?

1. $B_4{O}_{10}$
2. $B_2{O}_3$
3. $C_5{O}_2$
4. $K{O}_3$

Q. why is co_{2, }co and co_{3^{2-}} INORGANIC COMPOUNDS ?

Q. What would be the value of stoichiometric coefficients of $Mg$ and $V{O}_4^{3-}$ respectively, in the balanced net ionic equation for the given redox reaction in acidic medium:
$Mg\left(s\right)+V{O}_4^{3-}\left(aq\right)\to M{g}^{2+}\left(aq\right)+V^{2+}\left(aq\right)$

1. 3, 2
2. 8, 16
3. 1, 1
4. 5, 10

Q. Which one of the following cannot act as a ligand?

1. $P{H}_3$
2. $N{O}^{+}$
3. $C{l}^{-}$
4. $B{F}_3$

Q. How are 3Fe2+ ions converted to 2Fe3+ ions in Fe3O4

Q. Which of the following compounds has the maximum molar conductivity?

1. $K\left[Co{\left(N{H}_3\right)}_2{\left(N{O}_2\right)}_4\right]$
2. $\left[Cr{\left(N{H}_3\right)}_3{\left(N{O}_2\right)}_3\right]$
3. ${\left[Cr{\left(N{H}_3\right)}_5\left(N{O}_2\right)\right]}_3{\left[Co{\left(N{O}_2\right)}_6\right]}_2$
4. $Mg\left[Cr\left(N{H}_3\right){\left(N{O}_2\right)}_5\right]$

Q. 20. What are the Total Number of atoms in Maitotoxin?

Q. what can be prefix and sufix of acid and aldehyde can be decided

Q. how to convert amide to carboxylic acid