Practical and Analytical Chemistry — JEE Advanced PYQs

Consider the following reaction sequence in which J, K, L and M are the major products.

Given:
Atomic mass (in amu): H : 1, C : 12, N : 14, O : 16, S : 32, Br : 80, Ba : 137

The volume of 1 M aqueous ${\text{H}}_2{\text{SO}}_4$ required to completely neutralize the ammonia evolved …

Consider the following reaction sequence in which J, K, L and M are the major products.

Given:
Atomic mass (in amu): H : 1, C : 12, N : 14, O : 16, S : 32, Br : 80, Ba : 137

In sulphur estimation by Carius method, the amount of ${\text{BaSO}}_4$ formed from 3.79 g of $\mathbf{M}$ …

The monomer $(\mathbf{X})$ involved in the synthesis of Nylon 6,6 gives positive carbylamine test. If 10 moles of $\mathbf{X}$ are analyzed using Dumas method, the amount (in grams) of nitrogen gas evolved is ____.

Use: Atomic mass of N (in amu) = 14

The correct match of the group reagents in List-I for precipitating the metal ion given in List-II from solutions, is
| …

During sodium nitroprusside test of sulphide ion in an aqueous solution, one of the ligands coordinated to the metal ion is converted to

The treatment of an aqueous solution of 3.74 g of $\mathrm{Cu}{\left({\mathrm{NO}}_3\right)}_2$ with excess KI results in a brown solution along with the formation of a precipitate. Passing ${\mathrm{H}}_2\mathrm{S}$ through this brown solution gives another precipitate X. …

Consider the following reaction.

On estimation of bromine in 1.00 g of $\mathbf{R}$ using Carius method, the amount of AgBr formed (in g ) is ____.

[Given : Atomic mass of $\mathrm{H}=1,\mathrm{C}=12,\mathrm{O}=16,\mathrm{P}=31,\mathrm{Br}=80,\mathrm{Ag}=108$ ]

Match the compounds in LIST-I with the observation in LIST-II, and choose the correct option.
| (I) Aniline | (P) Sodium fusion extract of the compound on boiling with ${\mathrm{FeSO}}_4$, followed by acidification with conc. …

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

A mixture of two salts is used to prepare a solution $\mathbf{S}$, which gives the following results:
$\underset{\text{only}}{\mathrm{White}}$ precipitate(s) $\underset{\text{Room temperature}}{\overset{\text{Dilute NaOH(aq.)}}{\leftarrow }}$ …

A sample (5.6 g) containing iron is completely dissolved in cold dilute HCl to prepare a 250 mL of solution. Titration of 25.0 mL of this solution requires 12.5 mL of $0.03\mathrm{M}{\mathrm{KMnO}}_4$ solution to reach the end point. Number of moles of ${\mathrm{Fe}}^{2+}$ pr …

A sample (5.6 g) containing iron is completely dissolved in cold dilute HCl to prepare a 250 mL of solution. Titration of 25.0 mL of this solution requires 12.5 mL of $0.03\mathrm{M}{\mathrm{KMnO}}_4$ solution to reach the end point. Number of moles of ${\mathrm{Fe}}^{2+}$ pr …

The reaction of ${\mathrm{K}}_3\left[\mathrm{Fe}(\mathrm{CN}{)}_6\right]$ with freshly prepared ${\mathrm{FeSO}}_4$ solution produces a dark blue precipitate called Turnbull's blue. Reaction of ${\mathrm{K}}_4\left[\mathrm{Fe}(\mathrm{CN}{)}_6\right]$ with the …

The reaction of ${\mathrm{K}}_3\left[\mathrm{Fe}(\mathrm{CN}{)}_6\right]$ with freshly prepared ${\mathrm{FeSO}}_4$ solution produces a dark blue precipitate called Turnbull's blue. Reaction of ${\mathrm{K}}_4\left[\mathrm{Fe}(\mathrm{CN}{)}_6\right]$ with the …

A colorless aqueous solution contains nitrates of two metals, X and Y. When it was added to an aqueous solution of NaCl, a white precipitate was formed. This precipitate was found to be partly soluble in hot water to give a residue P and a solution Q. The residue P was soluble in …

5.00 mL of 0.10 M oxalic acid solution taken in a conical flask is titrated against NaOH from a burette using phenolphthalein indicator. The volume of NaOH required for the appearance of permanent faint pink color is tabulated below for five experiments. What is the concentration …

The green colour produced in the borax bead test of a chromium(III) salt is due to -

The correct option(s) to distinguish nitrate salts of ${\mathrm{Mn}}^{2+}$ and ${\mathrm{Cu}}^{2+}$ taken separately is (are)

The reagent(s) that can selectively precipitate ${\mathrm{S}}^{2-}$ from a mixture of ${\mathrm{S}}^{2-}$ and ${\mathrm{SO}}_4^{2-}$ in aqueous solution is(are)

The pair(s) of ions where BOTH the ions are precipitated upon passing H₂S gas in presence of dilute HCl, is(are)

Among $\mathrm{PbS},\mathrm{CuS},\mathrm{HgS},\mathrm{MnS},{\mathrm{Ag}}_2\mathrm{S},\mathrm{NiS},\mathrm{CoS},{\mathrm{Bi}}_2{\mathrm{S}}_3$ and ${\mathrm{SnS}}_2$, the total number of BLACK coloured sulfides is

Upon treatment with ammoniacal $H_{2}S$, the metal ion that precipitates as a sulfide is

An aqueous solution of a mixture of two inorganic salts, when treated with dilute $HCl$, gave a precipitate $(\mathbf{P})$ and a filtrate $(\mathbf{Q})$. The precipitate $\mathbf{P}$ was found to dissolve in hot water. The filtrate $(\mathbf{Q})$ remaine …

An aqueous solution of a mixture of two inorganic salts, when treated with dilute $HCl$, gave a precipitate $(\mathbf{P})$ and a filtrate $(\mathbf{Q})$. The precipitate $\mathbf{P}$ was found to dissolve in hot water. The filtrate $(\mathbf{Q})$ remaine …

Bleaching powder and bleach solution are produced on a large scale and used in several household products. The effectiveness of bleach solution is often measured by iodometry.

25 mL of household bleach solution was mixed with 30 mL of 0.50 M KI and 10 mL of 4 N acetic acid. In t …

For the given aqueous reactions, which of the statement(s) is (are) true ?

Identify the binary mixture(s) that can be separated into individual compounds, by differential extraction, as shown in the given scheme.

Which of the following hydrogen halides react(s) with ${\mathrm{AgNO}}_3(\mathrm{aq})$ to give a precipitate that dissolves in ${\mathrm{Na}}_2{\mathrm{S}}_2{\mathrm{O}}_3(\mathrm{aq})$ ?

Passing ${\mathrm{H}}_2\mathrm{S}$ gas into a mixture of ${\mathrm{Mn}}^{2+}$, ${\mathrm{Ni}}^{2+}$, ${\mathrm{Cu}}^{2+}$ and ${\mathrm{Hg}}^{2+}$ ions in an acidified aqueous solution precipitates

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

A solution when diluted with ${\mathrm{H}}_2\mathrm{O}$ and boiled, it gives a white precipitate. On addition of excess ${\mathrm{NH}}_4\mathrm{Cl}/{\mathrm{NH}}_4\mathrm{OH}$. the volume of precipitate decreases leaving behind a white gelatinous precipitate. Identify th …

${\mathrm{MgSO}}_4$ on reaction with ${\mathrm{NH}}_4\mathrm{OH}$ and ${\mathrm{Na}}_2{\mathrm{HPO}}_4$ forms a white crystalline precipitate. What is its formula?