Practical chemistry practice · Medium

An inorganic salt on reaction with dil. $HCl$ $\text{(or dil }\mathrm{H}_2 \mathrm{SO}_4)$ gives colourless gas, which turns lime water milky. The anion present in the salt is

Which sulphide is soluble in $\left(\mathrm{NH}_4\right)_2 \mathrm{CO}_3$

A white powder when strongly heated gives off brown fumes. A solution of this powder gives a yellow precipitate with a solution of $\text{KI}.$ When a solution of barium chloride is added to a solution of powder, a white precipitate results. This white powder may be

Which is maximum hydrated:

Starch iodide paper is used to test for the presence of :
A. iodide ion
B. oxidising agent
C. reducing agent

D. iodine

Of the following sulphides which one is insoluble in dil. acids but soluble in alkalies.

All of the following can be used as primary standards in acid-base titrations EXCEPT:

Mark the correct statement:

A black sulphide is formed by the action of $\mathrm{H}_2 \mathrm{S}$ on

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

The ion that cannot be precipitated by both ${HCl}$ and ${H}_2 {S}$ is

Which of the following will not produce a precipitate with $AgNO_3$ solution

A colourless salt gives violet colour in bunsen flame, it may be

Which of the following sulphate is insoluble in water?

Addition of 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

Which is not dissolved by dil $\mathrm{HCl}?$

Which of the following give white precipitate when $\mathrm{HCl}$ is added to its aqueous solution

A one litre flask is full of brown bromine vapours. The intensity of brown colour of vapour will not decrease appreciably on adding to the flask some.

Sodium sulphite on heating with dilute $HCl$ liberates a gas which

Disodium hydrogen phoshate is used to test:

Which one among the following pairs of ions cannot be separated by ${H}_2 {S}$ in dilute ${HCl}?$

The reagent $\mathrm{NH}_4 \mathrm{Cl}$ and aqueous $\mathrm{NH}_3$ will precipitate

A mixture of chlorides of copper, cadmium, chromium, iron and aluminium was dissolved in water acidified with ${HCl}$ and hydrogen sulphide gas was passed for sufficient time. It was filtered, boiled and a few drops of nitric acid were added while boiling. To this solution ammonium chloride and solution hydroxide were added and filtered. The filtrate shall give test for

When excess of ${SnCl}_2$ is added to a solution of ${HgCl}_2,$ a white ppt turning grey is obtained. The grey colour is due to the formation of

When adding the indicator to the conical flask,
only two or three drops are added because

(i) too much indicator may make it difficult
to see the colour change at the end-point


(ii) the indicator is corrosive, and adding too
much poses a greater risk

(iii) the indicator may be a weak acid or base
and may interfere with the titration result.

Which of the above statements is/are correct?

Which of the following doesn’t give a ppt. with silver nitrate solution.

When ${K}_2 {Cr}_2 {O}_7$ crystals are heated with conc. ${HCl},$ the gas evolved is

Identify the test which is not a part of qualitative analysis?

To a metal nitrate, when $\text{KI}$ solution is added, a black precipitate is produced at first, on adding excess of $\text{KI},$ orange solution is produced. Identify the metal ion.

Blue borax bead is obtained with