Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app

JEE Main

Exam: JEE Main
Subject: Chemistry
Chapter: Practical Chemistry

JEE Main · Chemistry · Practical Chemistry

In what order the reagents N a _ 2 S , NaCl and Nal are added to an...

In what order the reagents

N{a}_{2}S

,

NaCl

and

Nal

are added to an aqueous solution containing

{\text{Ag}}^{+}, {\text{Cu}}^{+ 2}

and

{\text{Ni}}^{+ 2}

ions in order to precipitate

Ag^{+}

first

Cu^{+ 2}

second and

Ni^{+ 2}

last.

Options

A $N{a}_{2}S, Nal, NaCl$
B $NaCl, N{a}_{2}S, Nal$
CNal, NaCl, N{a}_{2}S
D $NaCl, Nal, N{a}_{2}S$

Correct answer

D. $NaCl, Nal, N{a}_{2}S$

Step-by-step solution

With

NaCl

only

Ag^{+}

precipitates

Ag^{+} + NaCl ↓ + Na^{+}

With

Nal, Cu^{+ 2}

precipitates

2Cu^{+ 2} + 4I^{-} \to C{u}_{2}{I}_{2} ↓ + {I}_{2}

With

N{a}_{2}S, Ni^{+ 2}

precipitates

Ni^{+ 2} + N{a}_{2}S \to NiS ↓ + 2Na^{+}

Practice Practical Chemistry on Quantrex Academy →

More from Practical Chemistry

Passage: Consider the following reaction sequence in which J , K , L and M are the major… JEE Advanced 2026 Among Fe^ 3+ , Pb^ 2+ , Cu^ 2+ and Mn^ 2+ , identify the one that gets precipitated out… JEE Main 2026 Among Fe^ 2+ , Fe^ 3+ , Cr^ 2+ and Zn^ 2+ , the ion that shows positive borax bead test… JEE Main 2026 A salt with few drops of conc. HCl gives apple green colour in flame test. The group… JEE Main 2026 A student has been given 0.314 g of an organic compound and asked to estimate Sulphur.… JEE Main 2026 In the Group analysis of cations, Ba^ 2+ ~\&~ Ca^ 2+ are precipitated respectively as JEE Main 2026 Consider three metal chlorides x, y and z, where x is water soluble at room temperature… JEE Main 2026 By usual analysis, 1.00 g of compound (X) gave 1.79 g of magnesium pyrophosphate. The… JEE Main 2026 Full Practical Chemistry list All 99 Percentile Qs Bank for JEE Main PYQs