Systematic Analysis of Cationic Radicals

The reaction of $\mathrm{Pb}{\left({\mathrm{NO}}_3\right)}_2$ and $\mathrm{NaCl}$ in water produces a precipitate that dissolves upon the addition of $\mathrm{HCl}$ of appropriate concentration. The dissolution of the precipitate is due to the formation of

Find the number of compounds which have yellow colour precipitate from the given compounds:

${\mathrm{PbCl}}_2, {\mathrm{Hg}}_2{\mathrm{Cl}}_2, \left[\mathrm{Ag}{\left({\mathrm{NH}}_3\right)}_2\right]\mathrm{Cl}, {\mathrm{SnCl}}_2, {\mathrm{HgI}}_2, \mathrm{PbS}$

A reagent used to test nickel ion is ______.

A colourless water soluble solid $\text{'}\mathrm{X}\text{'}$ on heating gives equimolar quantities of $\mathrm{Y}$ and $\mathrm{Z}$ . $\mathrm{Y}$ gives dense white fumes with $\mathrm{HCl}$ and $\mathrm{Z}$ does so with ${\mathrm{NH}}_3.\mathrm{Y}$ gives brown precipitate with Nessler's reagent and $\mathrm{Z}$ gives white precipitate with nitrates of ${\mathrm{Ag}}^{+},{\mathrm{Pb}}^{2+}$ and ${\mathrm{Hg}}^{+}·\text{'}\mathrm{X}\text{'}$ is:

${\mathrm{Z}\mathrm{n}\mathrm{C}\mathrm{l}}_2$ reacts with excess of ${\mathrm{N}\mathrm{H}}_3$ solution to produce which of the folloing?

Which of the following are produced when ${\mathrm{Z}\mathrm{n}\mathrm{C}\mathrm{l}}_2$ reacts with excess of ammonia solution?

Therefore $\left(\mathrm{X}\right)$ is -

Name the metal which reacts with sodium hydroxide solution, liberating hydrogen gas.

A white gelatinous precipitate is formed when this compound reacts with sodium hydroxide.

The pair of ions that can not be separated by ${\mathrm{H}}_2\mathrm{S}$ in the presence of dilute hydrochloric acid are

When ammonia gas is passed through Nessler's solution the colour becomes-

Which of the following sulphide would dissolve in hot and concentrated nitric acid?

On adding sodium hydroxide drop by drop to a solution of ferrous sulphate, a dirty green precipitate is formed. Write the chemical formula of the compound formed of this colour.

$\mathrm{A}: \mathrm{Fe}{\left(\mathrm{OH}\right)}_3 \mathrm{B}: \mathrm{Fe}{\left(\mathrm{OH}\right)}_2 \mathrm{C}: {\mathrm{Fe}}_2{\mathrm{O}}_3 \mathrm{D}: \mathrm{FeO}$ (Enter your correct answer as $\mathrm{A}, \mathrm{B}, \mathrm{C} \mathrm{or} \mathrm{D}$)

The colour of precipitate formed when sodium hydroxide is added to a solution of ferric chloride is _____.

The addition of an excess of ammonium chloride ammonia buffer to a solution containing nitrates of $\mathrm{Al}, \mathrm{Bi}, \mathrm{Mg}$ and $\mathrm{Zn}$ will precipitate hydroxides of

A white gelatinous precipitate is formed when this compound reacts with sodium hydroxide.

${\mathrm{PbO}}_2$ is obtained from
 

Read the following sequence of reactions:

What are the compounds $\mathrm{D}$ and $\mathrm{E}$?

The coordination number of Hg in Millon's base is

When aqueous solution of copper sulphate is added in excess of dilute $\mathrm{N}{\mathrm{H}}_4\mathrm{O}\mathrm{H}$ , an intense blue colour is obtained. This is due to formation of-