Central Atom and Ligands

Q.

$KMn{O}_4$ acts as an oxidising agent in an alkaline medium. When alkaline $KMn{O}_4$ is treated with $KI,$ the iodide ion is oxidised to ____________.

1. $I{O}^{-}$
2. $I{O}_4^{-}$
3. $I_2$
4. $I{O}_3^{-}$

Q. Which is a stronger reducing agent $C{r}^{2+}$ or $F{e}^{2+}$ and why ?

Q.

Explain Arrhenius theory of electrolysis.

Q.

The one that is not expected to show isomerism is:

1. ${\left[\mathrm{Ni}{\left({\mathrm{NH}}_3\right)}_4{\left({\mathrm{H}}_2\mathrm{O}\right)}_2\right]}^{+2}$

2. ${\left[\mathrm{Ni}{\left(\mathrm{en}\right)}_3\right]}^{+2}$

3. $\left[\mathrm{Pt}{\left({\mathrm{NH}}_3\right)}_2{\mathrm{Cl}}_2\right]$

4. $\left[\mathrm{Ni}{\left({\mathrm{NH}}_3\right)}_2{\mathrm{Cl}}_2\right]$

Q.

Identify the reducing and oxidising agents in the reaction:

PbS + 4H₂O₂ → PbSO₄ + 4H₂O

Q.

Ferrous sulfate solution reacts with sodium hydroxide solution to form a ______ precipitate of ferrous hydroxide.

Q.

Define oxidising and reducing agents.

Q.

What is Flexidentate ligand? Give examples with structures.

Q.

Why is Potassium permanganate purple in color?

Q. When $C{u}^{2+}$ ion is treated with $KI$, a white precipitate is formed. Explain the reaction with the help of a chemical equation.

Q.

What type of ligand is ammonia?

Q.

Differentiate between the oxidizing agent and reducing agent.

Q. Which of the following options will be correct for the stage of half completion of the reaction $A\rightleftharpoons B$

1. $\Delta G^{\Theta }=0$
2. $\Delta G^{\Theta }>0$
3. $\Delta G^{\Theta }=-RTln2$
4. $\Delta G^{\Theta }<0$

Q.

Identify the reducing agent and oxidizing agent in the following reactions:

$2{\mathrm{H}}_2+{\mathrm{O}}_2\to 2{\mathrm{H}}_2\mathrm{O}$

Q. IUPAC name of the co ordination compound Fe₃[Fe(CN)₆]₂

Q.

________ acid can decolourise purple colored potassium permanganate solution.

1. Sulphuric acid

2. Citric acid

3. Carbonic acid

4. Hydrochloric acid

Q.

Which is the strongest base Cl or Br ?

Q.

Which has the maximum conductivity in their 01m solution

1. $\left[\mathrm{Co}\right({\mathrm{NH}}_3{)}_4\mathrm{Cl}]{\mathrm{Cl}}_2$

2. $\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_6\right]{\mathrm{Cl}}_3$

3. $\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_3{\mathrm{Cl}}_3\right]$

4. $\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_5\mathrm{Cl}\right]{\mathrm{Cl}}_2$

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

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

Q.

Identify the oxidising and reducing agents in the following reactions:

${\mathrm{H}}_2\mathrm{S}+{\mathrm{Br}}_2\to 2\mathrm{HBr}+\mathrm{S}$

Q.

What is the IUPAC name of $\left[\mathrm{Fe}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]{\mathrm{SO}}_4$?

Q.

Give the names of the elements present in the following compounds:

Hydrogen Bromide

Q.

During electrolysis of sodium chloride, the gas released at the anode is :

1. Chlorine

2. Hydrogen

3. Oxygen

4. None of these

Q. Bring out the following conversion:- Benzaldehyde to α-Hydroxyphenylacetic acid.

Q. Which of the following statements is incorrect?

1. The intensity of red colour increases when oxalic acid is added to a solution containing iron $\left(III\right)$ nitrate and potassium thiocyanate.
2. Equilibrium constant for a reaction with negative $\Delta H$ value decreases as the temperature increases.
3. On addition of catalyst the equilibrium constant value is not affected.
4. In equilibrium mixture of ice and water kept in perfectly insulated flask mass of ice and water does not change with time.

Q. Identify the correct statements with reference to the given reaction $P_4+3O{H}^{-}+3H_{2}O\to P{H}_3+3H_{2}P{O}_2^{-}$

1. Phosphorus is undergoing reduction only.
2. Phosphorus is undergoing oxidation only.
3. Phosphorus is undergoing oxidation as well as reduction.
4. Hydrogen is undergoing neither oxidation nor reduction.

Q.

Fill in the blank with the choices given in the bracket.

_______ ($\mathrm{AgCl}/{\mathrm{PbCl}}_2$), a white precipitate is soluble in excess ${\mathrm{NH}}_4\mathrm{OH}$.

Q.

Explain the chemical reactions that take place in Boschs process.

Q.

Write the formula for the coordination compounds:

mercury tetrathiocyanato cobaltate (III)

Q.

Identify the oxidising and reducing agents in the following reactions:

$3{\mathrm{MnO}}_2+4\mathrm{Al}\to 3\mathrm{Mn}+2{\mathrm{Al}}_2{\mathrm{O}}_3$