Systematic Analysis of Anionic Radicals

A gas having a pungent odour and a pale yellow precipitate are formed on heating dilute hydrochloric acid with an aqueous solution containing :

Which of the following salt will give white precipitate with the solution containing ${\text{Pb}}^{2+}$ ions?

During the detection of acidic radical present in a salt, a student gets a pale yellow precipitate soluble
with difficulty in NH₄OH solution when sodium carbonate extract was first acidified with dil. HNO₃
and then AgNO₃ solution was added. This indicates presence of:

Salt$\stackrel{{\mathrm{AgNO}}_3}{\to }$Yellow ppt$\stackrel{{\mathrm{NH}}_4\mathrm{OH}}{\to }$Insoluble

The salt may contain anion:

Molar mass of the salt from $\mathrm{NaBr}, {\mathrm{NaNO}}_3, \mathrm{KI}$ and ${\mathrm{CaF}}_2$ which does not evolve coloured vapours on heating with concentrated ${\mathrm{H}}_2{\mathrm{SO}}_4$ is ____ $\mathrm{g} {\mathrm{mol}}^{–1}$, (Molar mass in $\mathrm{g} {\mathrm{mol}}^{–1} : \mathrm{Na} : 23, \mathrm{N} : 14, \mathrm{K} : 39, \mathrm{O} : 16, \mathrm{Br} : 80, \mathrm{I} : 127, \mathrm{F} : 19, \mathrm{Ca} : 40$)

Which of the following does not give colour with conc. sulphuric acid?

When phosphate radical react with ammonium molybdate, the colour of precipitate obtained is

Which of the following anions would decolourise acidified $KMn{O}_4$ solution

The equivalent masses of $\mathrm{N}{\mathrm{a}}_2\mathrm{C}{\mathrm{O}}_3$ when it is titrated with $\mathrm{H}\mathrm{C}\mathrm{l}$ using phenolphthalein and methyl orange separate experiments are

Which of the following reagent from group $\mathrm{IV}$ is used in testing the basic radicals?

Sodium carbonate extract is prepared by:

Soda extract is prepared by

Solution of $\left(\mathrm{x}\right)\mathrm{ }+\mathrm{ }\mathrm{d}\mathrm{i}\mathrm{l}\mathrm{ }\mathrm{H}\mathrm{C}\mathrm{l}\mathrm{ }⟶\mathrm{ }\mathrm{y}\mathrm{e}\mathrm{l}\mathrm{l}\mathrm{o}\mathrm{w}\mathrm{ }\mathrm{p}\mathrm{p}\mathrm{t}\mathrm{ }+\mathrm{ }\mathrm{g}\mathrm{a}\mathrm{s}$ having smell of burnt sulphur

Solution of $\left(\mathrm{x}\right)\mathrm{ }+\mathrm{ }\mathrm{K}\mathrm{C}\mathrm{N}\mathrm{ }\mathrm{s}\mathrm{o}\mathrm{l}\mathrm{u}\mathrm{t}\mathrm{i}\mathrm{o}\mathrm{n}\mathrm{ }⟶\mathrm{ }\left(\mathrm{Y}\right)\mathrm{ }+\left(\mathrm{Z}\right))$

$\left(\mathrm{Y}\right)\mathrm{ }+\mathrm{ }\mathrm{e}\mathrm{x}\mathrm{c}\mathrm{e}\mathrm{s}\mathrm{s}\mathrm{ }\mathrm{o}\mathrm{f}\mathrm{ }\mathrm{d}\mathrm{i}\mathrm{l}.\mathrm{ }\mathrm{H}\mathrm{C}\mathrm{l}\mathrm{ }+\mathrm{ }\mathrm{F}\mathrm{e}\mathrm{C}\mathrm{l}3\mathrm{ }\mathrm{s}\mathrm{o}\mathrm{l}\mathrm{u}\mathrm{t}\mathrm{i}\mathrm{o}\mathrm{n}⟶$

blood red colouration

$\left(\mathrm{Z}\right)\mathrm{ }+\mathrm{ }\mathrm{P}\mathrm{b}{\left({\mathrm{N}\mathrm{O}}_3\right)}_2\mathrm{ }⟶$

$\mathrm{w}\mathrm{h}\mathrm{i}\mathrm{t}\mathrm{e}\mathrm{ }\mathrm{p}\mathrm{p}\mathrm{t}\stackrel{\mathrm{b}\mathrm{o}\mathrm{i}\mathrm{l}\mathrm{i}\mathrm{n}\mathrm{g}}{\to }\mathrm{ }\mathrm{w}\mathrm{h}\mathrm{i}\mathrm{t}\mathrm{e}\mathrm{ }\mathrm{p}\mathrm{p}\mathrm{t}\mathrm{ }\left(\mathrm{M}\right)$

solution of $\left(\mathrm{Y}\right)\mathrm{ }+\mathrm{ }\mathrm{P}\mathrm{b}{\left({\mathrm{N}\mathrm{O}}_3\right)}_2\mathrm{ }\mathrm{s}\mathrm{o}\mathrm{l}\mathrm{u}\mathrm{t}\mathrm{i}\mathrm{o}\mathrm{n}\mathrm{ }\stackrel{\mathrm{b}\mathrm{o}\mathrm{i}\mathrm{l}\mathrm{i}\mathrm{n}\mathrm{g}}{\to }\mathrm{ }\mathrm{b}\mathrm{l}\mathrm{a}\mathrm{c}\mathrm{k}\mathrm{ }\mathrm{p}\mathrm{p}\mathrm{t}$

[X] + H₂SO₄ → [Y] a colourless gas with an irritating smell

$\left[\mathrm{Y}\right]+{\mathrm{K}}_2{\mathrm{C}\mathrm{r}}_2{\mathrm{O}}_7+{\mathrm{H}}_2{\mathrm{S}\mathrm{O}}_4\to \mathrm{g}\mathrm{r}\mathrm{e}\mathrm{e}\mathrm{n}\mathrm{ }\mathrm{s}\mathrm{o}\mathrm{l}\mathrm{u}\mathrm{t}\mathrm{i}\mathrm{o}\mathrm{n}$

$\left[\mathrm{X}\right]$ and $\left[\mathrm{Y}\right]$ are, respectively -

Water-soluble mixture  $\underset{\left(\text{ii}\right)Filter}{\overset{\left(\text{i}\right){BaCl}_2}{\to }}$  white ppt.

Filtrate + (hot and conc.) HNO₃ + BaCl₂ $\to$ white ppt. So, the mixture contains

A solution of a metal ion, when treated with KI, gives a red precipitate which dissolves in an excess of KI to give a colourless solution. Moreover, the solution of the metal ion on treatment with a solution of cobalt(II) thiocyanate gives rise to a deep blue crystalline precipitate. The metal ions is :

Which of the following mixtures of ions can be separated by using an excess of an NaOH solution ?

A pale yellow precipitate and a gas with pungent odour are formed on warming dilute hydrochloric acid with an aqueous solution containing :

Aqueous solution of KI is used to detect: