Potassium Permanganate

Q. calculate the percentage ionization of 0.01M acetic acid in 0.1M HCl Ka of acetic acid is 1.8×10^-

Q.

8. Which of the following molecule has max dipole moment?

1. $C{O}_2$

2. $C{H}_4$

3. $N{H}_3$

4. $N{F}_3$

Q. Name the gas that can readily decolourise acidified $KMn{O}_4$ solution.

1. $S{O}_2$
2. $N{O}_2$
3. $P_2{O}_5$
4. $C{O}_2$

Q. 1g of KClO3 was heated under such conditions that a part of it decomposed according to the equation, 2KClO3 gives 2KCl+3O2 and the remaining decomposed as 4KClO3 gives 3KClO4+KCl. If the O2 evolved was 146.8ml at STP, calculate the % by weight of KClO4 in the residue.

Q. Reduction of the metal centre in aqueous permanganate ion involves

1. 3 electrons in neutral medium
2. 5 electrons in neutral medium
3. 3 electrons in alkaline medium
4. 5 electrons in acidic medium

Q. 12 g of carbon is react with 20 g of oxygen.find the weight of co and co2

Q.

Intramolecular hydrogen bonding leads to

1. Cyclisation of the molecules

2. Increase in surface tension of a compound

3. Increase in solubility of a compound

4. Increase in viscosity of a compound

Q. a 0.2 molar solution of formic acid is 3.2% ionized the ionizaton cons†an t is

Q. Structure of 2 methylpropanoic acid?

Q.

On heating the reactant, which of the following chemical reactions will not take place?

1. $2{\mathrm{KClO}}_3\to 2\mathrm{KCl}+3{\mathrm{O}}_2$

2. ${\mathrm{CaCO}}_3\to \mathrm{CaO}+{\mathrm{CO}}_2$

3. $2{\mathrm{H}}_2\mathrm{O}\to 2{\mathrm{H}}_2+{\mathrm{O}}_2$

4. $2{\mathrm{H}}_2{\mathrm{O}}_2\to 2{\mathrm{H}}_2\mathrm{O}+{\mathrm{O}}_2$

Q. What happens when,

Q. 40Q calculate the percentage ionization of.01Maceticacidin.1MHCl Ka of acetic acid is1.8\ast10^-51.18%2.018%31.8%418%

Q. 3. How does CH3COONa decrease H+ ion concentration in acetic acid

Q.

The reaction $C_8{H}_{18}\to C_4{H}_{10}+C_2{H}_4+C{H}_4+C$ represents

1. Synthesis

2. Isomerisation

3. Cracking

4. Catalytic oxidation

Q. A green solution of potassium manganate (VI) turns purple and a brown solid is precipitated, when $C{O}_2$ gas is bubbled through the solution.

The above change is observed when $C{O}_2$ gas is passed into an aqueous solution of the given ion. The function of $C{O}_2$ is:

1. It makes the solution acidic due to the formation of $H_{2}C{O}_3$
2. It makes the solution basic due to the formation of $O_3^{2-}$
3. It is simply the medium of the reaction
4. None of the above is correct

Q. Describe the importance of the following:

A Limestone

B Cement

C Plaster of Paris

Q. 67 Conditions for tatomerism in both cyclic and acyclic hydrocarbons??

Q. Explain what happens when boric acid is heated.

Q.

What is A in the following reaction
$2F{e}_{aq}^{3+}+S{n}_{aq}^{2+}⟶2F{e}_{aq}^{2+}+A$

1. 

2. 

3. Sn

4. 

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. Why is nitric acid added to sodium extract before adding silver nitrate for testing halogens?

Q.

Amongst the following identify the species with an atom in + 6 oxidation state

1. MnO₄^-

2. Cr(CN)₆^3-

3. NiF₆^2-

4. CrO₂Cl₂

Q. a mixture of 2.3 formic acid and 4.5 oxalic acid is treated with conc. H2SO4 the evolved gaseous mixture is passed through KOH pelllets. Weight of the remaining product at STP will be

Q. 11. Conjugate acid of PO 3 isH&PO(2) H3PO1o(4) HPO3) HPO2

Q. A green solution of potassium manganate (VI) turns purple and a brown solid is precipitated, when $C{O}_2$ gas is bubbled through the solution.

The above change is observed when $C{O}_2$ gas is passed into an aqueous solution of the given ion. The function of $C{O}_2$ is:

1. It makes the solution acidic due to the formation of $H_{2}C{O}_3$
2. It makes the solution basic due to the formation of $O_3^{2-}$
3. It is simply the medium of the reaction
4. None of the above is correct

Q. Chlorine is prepared in the laboratory by treating manganese dioxide $\left({MnO}_2\right)$ with aqueous hydrochloric acid according to the reaction:

Q. on which factor does dipole moment depend in case of polyatomic molecules

Q. balance the following equation by ion electron method in acidic medium [MnO4]- + [Fe]2+ = [Mn]2+ [Fe]3+

Q. The correct order in which the O-O bond length increases in the following is a)H2O2