Toluene reacts with Baeyer's reagent to give

Important Questions on Transition and Inner Transition Elements

MEDIUM

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium dichromate and Potassium permanganate

The colour of $\mathrm{K}\mathrm{M}\mathrm{n}{\mathrm{O}}_4$ is due to: [where $\text{M}\to$ metal, $\text{L}\to$ ligand]

EASY

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium dichromate and Potassium permanganate

The ionic charges of manganate and permanganate ion are respectively

MEDIUM

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium dichromate and Potassium permanganate

A mixture of $\mathrm{NaCl}$ and ${\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7$ is heated with conc. ${\mathrm{H}}_2{\mathrm{SO}}_4$, deep red vapours and formed. Which of the following statement is false ?

EASY

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium dichromate and Potassium permanganate

Aqueous solution of a salt $\left(\mathrm{A}\right)$ forms a dense white precipitate with ${\mathrm{BaCl}}_2$ solution. The precipitate dissolves in dilute $\mathrm{HCl}$ to produce a gas $\left(\mathrm{B}\right)$ which decolourises acidified ${\mathrm{KMnO}}_4$ solution. $\mathrm{A}$ and $\mathrm{B}$ respectively are :

MEDIUM

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium dichromate and Potassium permanganate

Name the gas that can readily decolourise acidified ${\mathrm{KMnO}}_4$ solution.

EASY

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium dichromate and Potassium permanganate

When dil. sulphuric acid reacts with aqueous solution of potassium chromate, the colour changes from yellow to orange. This shows that

MEDIUM

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium dichromate and Potassium permanganate

When a mixture of manganese dioxide, potassium hydroxide and potassium chlorate is fused, the product obtained is

MEDIUM

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium dichromate and Potassium permanganate

In tetrahedral permanganate ion $\mathrm{\pi }$ bonding type between metal and oxygen is;

MEDIUM

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium dichromate and Potassium permanganate

Which of the following is not formed when H₂S reacts with acidic K₂Cr₂O₇ solution ?

MEDIUM

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium dichromate and Potassium permanganate

The manganate and permanganate ions are tetrahedral, due to:

HARD

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium dichromate and Potassium permanganate

Which one of the following statements is correct when $\mathrm{S}{\mathrm{O}}_2$ is passed through acidified ${\mathrm{K}}_2\mathrm{C}{\mathrm{r}}_2{\mathrm{O}}_7$ solution?

MEDIUM

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium dichromate and Potassium permanganate

When $X{O}_2$ is fused with an alkali metal hydroxide in presence of an oxidizing agent such as ${\mathrm{KNO}}_3$; a dark green product is formed which disproportionate in acidic solution to afford a dark purple solution. $X$ is:

EASY

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium dichromate and Potassium permanganate

A solid $\text{'}\mathrm{X}\text{'}$ on reaction with $\mathrm{dil} \mathrm{HCl}$ liberates a gas $\text{'}\mathrm{Y}\text{'}$, which decolorises acidified ${\mathrm{KMnO}}_4$. $\mathrm{X}, \mathrm{Y}$ respectively are:

EASY

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium dichromate and Potassium permanganate

Acidified potassium dichromate is treated with hydrogen sulphide. In the reaction, the oxidation number of chromium

EASY

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium dichromate and Potassium permanganate

Which one of the following titrations of permanganate does not give satisfactory results?

EASY

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium dichromate and Potassium permanganate

Treatment of alkaline ${\mathrm{KMnO}}_4$ solution with $\mathrm{KI}$ solution oxidizes iodide to:-

EASY

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium dichromate and Potassium permanganate

In acidic medium potassium permanganate oxides oxalic acid to;

MEDIUM

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium dichromate and Potassium permanganate

Thermal decomposition of a Mn compound $\left(\mathrm{X}\right)$ at $513\mathrm{ }\mathrm{K}$ results in compound $\mathrm{Y},$ $\mathrm{M}\mathrm{n}{\mathrm{O}}_2$ and a gaseous product. $\mathrm{M}\mathrm{n}{\mathrm{O}}_2$ reacts with $\mathrm{N}\mathrm{a}\mathrm{C}\mathrm{l}$ and concentrated ${\mathrm{H}}_2\mathrm{S}{\mathrm{O}}_4$ to give a pungent gas$\mathrm{Z}$ . $\mathrm{X},\mathrm{ }\mathrm{Y}$ and $\mathrm{Z},$ respectively, are:

EASY

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium dichromate and Potassium permanganate

How many peroxy linkages are present in $Cr{O}_5$ ?

MEDIUM

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium dichromate and Potassium permanganate

Which of the following statements is/are false?