Potassium Permanganate

Q.

${\mathrm{B}}_2{\mathrm{H}}_6+{\mathrm{NH}}_3\to$________ Complete the reaction.

Q. The number of moles of $KMn{O}_4$ reduced by one mole of $KI$ in alkaline medium is:

Q. Assuming complete ionisation, same moles of which of the following compounds will require the least amount of acidified $KMn{O}_4$ for complete oxidation?

1. $Fe{C}_2{O}_4$
2. $FeS{O}_4$
3. $Fe(N{O}_2{)}_2$
4. $FeS{O}_3$

Q. Calculate the oxidation number of each sulphur atom in the following compounds:

A) $N{a}_2{S}_2{O}_3$

B) $N{a}_2{S}_4{O}_6$

C) $N{a}_{2}S{O}_3$

D) $N{a}_{2}S{O}_4$

Q.

Give balanced equation of silver nitrate solution and sodium chloride solution?

Q.

Can we use potassium permanganate in drinking water?

Q. Why is $HCl$ not used to make the medium acidic in oxidation reactions of $KMn{O}_4$ in acidic medium?

1. $KMn{O}_4$ acts as a reducing agent in the presence of $HCl$
2. $KMn{O}_4$ is a weaker oxidising agent than $HCl$
3. $KMn{O}_4$ oxidises $HCl$ into $C{l}_2$ which is also an oxidising agent
4. Both $HCl$ and $KMn{O}_4$ act as oxidising agents

Q.

${\mathrm{CuSO}}_4$ dissolves in excess of $\mathrm{KCN}$ to give ----------?

Q.

What happens when ${\mathrm{CO}}_2$ gas is passed through lime water and why does it disappear on passing excess ${\mathrm{CO}}_2$?

Q. Which of the following reactions are disproportionation reactions?

1. ${2Mn{O}_4}^{-}+3M{n}^{2+}+2H_{2}O⟶5Mn{O}_2+4H^{+}$
2. $2KMn{O}_4⟶K_{2}Mn{O}_4+Mn{O}_2+O_2$
3. ${3Mn{O}_4}^{2-}+4H^{+}⟶{2Mn{O}_4}^{-}+Mn{O}_2+2H_{2}O$
4. $C{u}^{+}⟶C{u}^{+2}+Cu$
   

Q.

$4{\mathrm{NH}}_3\left(\mathrm{g}\right)+5{\mathrm{O}}_2\left(\mathrm{g}\right)\to 4\mathrm{NO}\left(\mathrm{g}\right)+6{\mathrm{H}}_2\mathrm{O}\left(\mathrm{g}\right)$

The following reaction is an example of a/an

1. Displacement Reaction

2. Combination Reaction

3. Redox Reaction

4. Neutralization Reaction

Q.

${\mathrm{KMnO}}_4$ and ${\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7$are colored compounds. Justify your statement.

Q.

Ammonium dichromate on heating gives?

Q. How to calculate the hybridization state in the given formula of compund. Ex:- The hybridization of BeCl2 in solid state and above 1200K is respectively (1) sp3, sp3 (2) sp3, sp2 (3) sp2, sp2 (4) sp3, sp

Q. Number of moles of $C{r}_2{O}_7^{-2}$ required to oxidise one mole of ferrous ion completely in acidic medium.

1. $\frac{1}{3}$
2. $\frac{1}{2}$
3. $\frac{1}{6}$
4. $\frac{1}{9}$

Q.

In weak alkaline medium KMnO₄ converted in to?

Q. Potassium permanganate acts as an oxidising agent in acidic medium. The number of moles of potassium permanganate that will be needed to react with one mole of sulphide ions in acidic solution is

Q. $Mn{O}_4^{-}$ is of intense pink colour, though $Mn$ is in $+7$ oxidation state. It is due to,

1. Charge transfer when $Mn$ gives its electrons to oxygen
2. None of the above
3. Oygen gives colour to it
4. Charge transfer when oxygen gives its electrons to $Mn$ to making it $Mn\left(VI\right)$ hence coloured

Q.

Lead carbonate is heated. The color of its residue is

Q. The complex formed when sodium nitroprusside is added to alkaline $N{a}_{2}S$ solution is

1. $N{a}_4\left[Fe\right(CN{)}_{5}NOS]$
2. $N{a}_4\left[Fe\right(CN{)}_{5}N{O}_2]$
3. $Fe\left(H_{2}O{)}_5\right(NO\left)\right]S{O}_4$
4. $N{a}_4\left[Fe\right(CN{)}_5{S}_2]$

Q.

What is the n factor of ${\mathrm{CO}}_2$?

Q. Calculate pH of a $1.0\times {10}^{-8}M$ solution of $HCl$.

Q. ntCalculate the percentage ionization of 0.01M acetic acid in 0.1M HCL Ka of acetic acid is 1.8 10-5(10 to the power 5)n

Q.

How do you acidify potassium manganate?

Q. In neutral or faintly alkaline solution, 8 moles of permanganate anion quantitatively oxidize thisosulphate anions to produce X moles of a sulphur containing product. The magnitude of X is. ___

Q. Which complex compound obeys 18-electron rule?

1. $\left[V\right(CO{)}_5]$
2. $\left[Fe\right(N{H}_3{)}_6{]}^{2+}$
3. $\left[Ni\right(CO{)}_6]$
4. $\left[Mn\right(H_{2}O{)}_6{]}^{2+}$

Q.

In the extraction of chlorine by electrolysis of brine ____________.

1. reduction of $C{l}^{-}$ ion to chlorine gas occurs..

2. For overall reaction $\Delta G^{\Theta }$ has negative value.

3. oxidation of $C{l}^{-}$ ion to chlorine gas occurs.

4. a displacement reaction takes place.

Q.

Which of the following has the same molecular weight and equivalent weight

1. H₃PO₃
2. H₃PO₄
3. H₂SO₂
4. H₃PO₂

Q.

Describe the preparation of potassium permanganate. How does the acidified permanganate solution react with
Iron

Write the ionic equations for the reactions.

(i) Ions
(ii) $S{o}_2$
(iii) Oxalic acid
Write the ionic equations for the reactions.

Q. Why is $HCl$ not used to make the medium acidic in oxidation reactions of $KMn{O}_4$ in acidic medium?

1. $KMn{O}_4$ acts as a reducing agent in the presence of $HCl$
2. $KMn{O}_4$ is a weaker oxidising agent than $HCl$
3. $KMn{O}_4$ oxidises $HCl$ into $C{l}_2$ which is also an oxidising agent
4. Both $HCl$ and $KMn{O}_4$ act as oxidising agents