TS EAPCET (DEMO) CHEMISTRY STRUCTURE OF ATOM PAPER

The principle involved in the classification of basic radicals is/are

$$\mathrm{Al}^{3+}, \mathrm{Fe}^{3+}$$ and $$\mathrm{Cr}^{3+}$$ are grouped together for qualitative analysis as their

Addition of conc. HCl to saturated $$\mathrm{BaCl}_{2}$$ solution precipitates $$\mathrm{BaCl}_{2}$$ because

Colourless salt coloured bead, X can be

Nitrate salt forms a brown ring treated with $$\mathrm{FeSO}_{4}(\mathrm{aq})$$ followed by a few drops of concentrated $$\mathrm{H}_{2} \mathrm{SO}_{4}$$. This test invoves

In III group of basic radical analysis, $$\mathrm{NH}_{4} \mathrm{Cl}$$ is added before group reagent $$\mathrm{NH}_{4} \mathrm{OH}$$. This is due to

$$\quad \mathrm{X}$$ is a colorless salt in cold but becomes yellow on heating. It is soluble in NaOH as well as in dilute HCl . X can be

$$\quad \mathrm{H}_{2} \mathrm{~S}$$ gas is passed into test tubes A and B containing aqueous solution of
A. $${ZnCl}_{2}$$
B. $$\mathrm{Zn}\left(\mathrm{CH}_{3} \mathrm{COO}\right)_{2}$$

The true statement about $$A$$ and $$B$$ is

Chloride salt gives colourless fumes with conc. $$\mathrm{H}_{2} \mathrm{SO}_{4}$$ while iodide salt gives violet fumes in the same test. This is because

A salt releases a colourless pungent gas ‘ $$X$$ ‘ when treated with dilute $$\mathrm{H}_{2} \mathrm{SO}_{4}$$. The released gas turns $$\mathrm{Cr}_{2} \mathrm{O}_{7}^{2-} / \mathrm{H}^{+}$$green. The green colour is due to the formation of ‘ $$Y^{\prime}$$. ‘ $$X$$ ‘ is used in the manufacture of $$H_{2} \mathrm{SO}_{4}$$ by contact process. $$X$$ and $$Y$$ are respectively

Mixture ” $$A$$ ” is an aqueous solution of two colourless substances $$X$$ and $$Y$$. On passing $${C l_{2}}(\mathrm{~g})$$ through the solution, a deep brown color is developed, while treatment of the solution with $${\mathrm{BaCl}_{2}}$$ or NaOH result in the formation of a white ppt. $$X$$ and $$Y$$ may be

Through aqueous solution of an iodide salt when $${\mathrm{Cl}_{2}}$$ gas is passed followed by the addition of $$\mathrm{CHCl}_{3}$$, the color of organic layer will become

The volatile compound Y burning with green flame has the formula

State whether the following statements are true or false and choose the correct option.
i. Brown ring test is a characteristic test for both $$\mathrm{NO}_{2}^{-}$$and $${NO}_{3}^{-}$$.
ii. A brown gas is evolved when either $${NO}_{2}^{-}$$or $$\mathrm{NO}_{3}^{-}$$is treated with concentrated solution of sulphuric acid.
iii. A nitrate salt gives $${NH}_{3}$$ when treated with alkali in the presence of copper metal.

Some facts related to compound $$X$$ are as follows:
i. It occupies 0.35 L per g at NTP
ii. It decolorizes acidified permanganate solution.
iii. Its aqueous solution produces white turbidity with $$\mathrm{H}_{2} \mathrm{~S}$$.

Compound X may be