Practical chemistry practice · Mixed difficulty

Test by which starch and cellulose can be distinguished from each other is

The ion which can be precipitated with $\mathrm{H}_2 \mathrm{S}$ in presence of $\mathrm{NH}_4 \mathrm{OH}$

Which of the following is used to oxidise $\mathrm{Fe}^{+2}$ to $\mathrm{Fe}^{+3}$ in III group.

The sulphides of which one of the following groups of elements are soluble in yellow ammonium sulphide?

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

An equimolar mixture of ferrous oxalate & stannous chloride is treated with decinormal acidic $\mathrm{KMnO}_4$ giving ferric, stannic & chlorate ions along with $\mathrm{CO}_2$ gas. If the titre value is $225 \mathrm{~ml}.$ Numbers of millimoles of chlorate ions produced are

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

A purple coloured solution is added from a burette to $\mathrm{FeSO}_4$ solution kept in the flask. After sometime, the purple colour changes to light pink. The ion formed from that solution is

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 $\mathrm{HCl}?$

A $16 \mathrm{~ml}$ volume of $0.2 \mathrm{~M} \mathrm{~KMnO}_4$ solution is needed to oxidize $25.00 \mathrm{~ml}$ of a $\mathrm{FeSO}_4$ solution in an acidic medium. What is the number of moles of $\mathrm{FeSO}_4$ being oxidized for the reaction

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