Quantrex Academy Quantrex AcademyPYQs with solutions · JEE · NEET · NDA

Home · JEE Main & Advanced · Chemistry · Practical Chemistry

Practical Chemistry — JEE Main & Advanced Chemistry PYQs

130 previous year questions from Practical Chemistry with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

130 questionsChemistrySolutions on every page
1

Passage: 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

JEE Advanced 2026 Solution View → 2

Among Fe³⁺ , Pb²⁺ , Cu²⁺ and Mn²⁺ , identify the one that gets precipitated out while passing H₂S in presence of NH₄OH as group reagent. The highest possible oxidation state of the

JEE Main 2026 Solution View → 3

Among Fe²⁺, Fe³⁺, Cr²⁺ and Zn²⁺ , the ion that shows positive borax bead test and with highest ionisation enthalpy is:

JEE Main 2026 Solution View → 4

A salt with few drops of conc. HCl gives apple green colour in flame test. The group precipitate of the salt is dissolved in acetic acid and treated with K₂CrO₄ to give yellow prec

JEE Main 2026 Solution View → 5

A student has been given 0.314 g of an organic compound and asked to estimate Sulphur. During the experiment, the student has obtained 0.4813 g of barium sulphate. The percentage o

JEE Main 2026 Solution View → 6

In the Group analysis of cations, Ba ²⁺ ~ &~ Ca ²⁺ are precipitated respectively as

JEE Main 2026 Solution View → 7

Consider three metal chlorides x , y and z, where x is water soluble at room temperature, y is sparingly soluble in water at room temperature and z is soluble in hot water. x , y a

JEE Main 2026 Solution View → 8

By usual analysis, 1.00 g of compound ( X ) gave 1.79 g of magnesium pyrophosphate. The percentage of phosphorus in compound (X) is : (nearest integer) (Given, molar mass in g mol

JEE Main 2026 Solution View → 9

The correct match of the group reagents in List-I for precipitating the metal ion given in List-II from solutions, is List-I List-II (P) Passing H ₂ ~S in the presence of NH ₄ OH (

JEE Advanced 2025 Solution View → 10

When a salt is treated with sodium hydroxide solution it gives gas X . On passing gas X through reagent Y a brown coloured precipitate is formed. X and Y respectively, are

JEE Main 2025 Solution View → 11

Formation of Na ₄ [ Fe ( CN )₅ NOS ] , a purple coloured complex formed by addition of sodium nitroprusside in sodium carbonate extract of salt indicates the presence of :

JEE Main 2025 Solution View → 12

Choose the correct tests with respective observations. (A) ( CuSO ₄ ) (acidified with acetic acid) (+ K ₄ [ Fe ( CN )₆ ] ) Chocolate brown precipitate. (B) ( FeCl ₃+ K ₄ [ Fe ( CN

JEE Main 2025 Solution View → 13

Among the following cations, the number of cations which will give characteristic precipitate in their identification tests with K ₄ [ Fe ( CN )₆ ] is _____. Cu ²⁺, Fe ³⁺, Ba ²⁺, C

JEE Main 2025 Solution View → 14

Identify A , B and C in the given below reaction sequence A HNO ₃ ~Pb ( NO ₃ )₂ H ₂ SO ₄ B [ (2) Acetic acid (3) K ₂ CrO ₄ ] (1) Ammonium acetate

JEE Main 2025 Solution View → 15

Consider the following test for a group-IV cation. ( aligned & M ²⁺+ H ₂ ~S A (Black precipitate) + by product & A + aqua regia B + NOCl + S + H ₂ O & B + KNO ₂+ CH ₃ COOH C + by p

JEE Main 2024 Solution View → 16

Match List I with List II ( array |l|l|l|l| & List-I & & List-II & (Name of the test) & & (Reaction sequence involved) [M is metal] A. & Borax bead test & I. & MCO ₃ MO Co ( NO ₃ )

JEE Main 2024 Solution View → 17

During the detection of acidic radical present in a salt, a student gets a pale yellow precipitate soluble with difficulty in ( NH ₄ OH ) solution when sodium carbonate extract was

JEE Main 2024 Solution View → 18

Match List - I with List - II. ( array ll List - I & List - II Reaction & Type of redox reaction (A) Li & (I) 589.2 (B) Na & (II) 455.5 (C) Rb & (III) 670.8 (D) Cs & (IV) 780.0 arr

JEE Main 2024 Solution View → 19

Match List I with List II ( array |l|l|l|l| & List - I & & List - II & (Precipitating reagent and conditions) & & (Cation) A. & NH ₄ Cl + NH ₄ OH / ARKS & I. & Mn ²⁺ B. & NH ₄ OH +

JEE Main 2024 Solution View → 20

In a borax bead test under hot condition, a metal salt (one from the given) is heated at point B of the flame, resulted in green colour salt bead. The spin-only magnetic moment val

JEE Main 2024 Solution View → 21

In the precipitation of the iron group (III) in qualitative analysis, ammonium chloride is added before adding ammonium hydroxide to :

JEE Main 2024 Solution View → 22

The number of white coloured salts among the following is ....... A SrSO 4 B Mg NH 4 PO 4 C BaCrO 4 D Mn ( OH ) 2 E PbSO 4 F PbCrO 4 G AgBr H PbI 2 I CaC 2 O 4 J Fe ( OH ) 2 CH 3 C

JEE Main 2024 Solution View → 23

The compound that is white in color is

JEE Main 2024 Solution View → 24

Molar mass of the salt from NaBr , NaNO 3 , KI and CaF 2 which does not evolve coloured vapours on heating with concentrated H 2 SO 4 is ____ g mol – 1 , (Molar mass in g mol – 1 :

JEE Main 2024 Solution View → 25

Number of metal ions characterized by flame test among the following is _________. Sr 2 + , Ba 2 + , Ca 2 + , Cu 2 + , Zn 2 + , Co 2 + , Fe 2 +

JEE Main 2024 Solution View → 26

Given below are two statements: Statement-I: The gas liberated on warming a salt with dil H 2 SO 4 , turns a piece of paper dipped in lead acetate into black, it is a confirmatory

JEE Main 2024 Solution View → 27

The Lassiagne's extract is boiled with dil HNO 3 before testing for halogens because,

JEE Main 2024 Solution View → 28

On passing a gas, ' X ', through Nessler's reagent, a brown precipitate is obtained. The gas ' X ' is

JEE Main 2024 Solution View → 29

A reagent which gives brilliant red precipitate with Nickel ions in basic medium is

JEE Main 2024 Solution View → 30

Oxidation state of Fe(Iron) in complex formed in Brown ring test.

JEE Main 2024 Solution View → 31

In the wet tests for detection of various cations by precipitation, Ba 2 + cations are detected by obtaining precipitate of

JEE Main 2023 Solution View → 32

Formation of which complex, among the following, is not a confirmatory test of Pb 2 + ions

JEE Main 2023 Solution View → 33

Given below are two statements : Statement I : Upon heating a borax bead dipped in cupric sulphate in a luminous flame, the colour of the bead becomes green. Statement II : The gre

JEE Main 2023 Solution View → 34

In the wet tests for identification of various cations by precipitation, which transition element cation doesn't belong to group IV in qualitative inorganic analysis?

JEE Main 2023 Solution View → 35

A white precipitate was formed when BaCl 2 was added to water extract of an inorganic salt. Further, a gas ' X ' with characteristic odour was released when the formed whit

JEE Main 2022 Solution View → 36

Match List I with List II. List-I (Anion) List-II (gas evolved on reaction with dil. H 2 SO 4 ) (A) CO 3 2 - (I) Colourless gas which turns lead acetate paper black. (B) S 2 - (II)

JEE Main 2022 Solution View → 37

Which of the following is structure of a separating funnel?

JEE Main 2022 Solution View → 38

Which statement is not true with respect to nitrate ion test?

JEE Main 2022 Solution View → 39

In the flame test of a mixture of salts, a green flame with blue centre was observed. Which one of the following cations may be present?

JEE Main 2022 Solution View → 40

During the qualitative analysis of salt with cation y 2 + , addition of a reagent X to alkaline solution of the salt gives a bright red precipitate. The reagent X and the cation y

JEE Main 2022 Solution View → 41

A mixture of two salts is used to prepare a solution S , which gives the following results: White precipitate s only ← Room temperature Dilute NaOH ( aq ) S aq . solution of

JEE Advanced 2021 Solution View → 42

To an aqueous solution containing ions such as Al 3 + , Zn 2 + , Ca 2 + , Fe 3 + , Ni 2 + , Ba 2 + and Cu 2 + was added conc . HCl , followed by H 2 S . The total number of cations

JEE Main 2021 Solution View → 43

Match List-I with List-II List-I List-II Test/Reagents/Observation(s) Species detected (a) Lassaigne's Test (i) Carbon (b) Cu(II) oxide (ii) Sulphur (c) Silver nitrate (iii) N

JEE Main 2021 Solution View → 44

Given below are two statements: Statement I : Colourless cupric metaborate is reduced to cuprous metaborate in a luminous flame. Statement II : Cuprous metaborate is obtained by he

JEE Main 2021 Solution View → 45

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 foun

JEE Advanced 2020 Solution View → 46

The ammonia evolved from the treatment of 0.30 g of an organic compound for the estimation of nitrogen was passed in 100 mL of 0.1 M sulphuric acid. The excess of acid required 20

NTA Abhyas JEE Main 2020 Solution View → 47

A red solid is insoluble in water. However, it becomes soluble if some K I is added to water. Heating the red solid in a test tube results in liberation of some violet coloured fum

NTA Abhyas JEE Main 2020 Solution View → 48

Passing H 2 S in to a mixture of M n 2 + , N i 2 + , C u 2 + and H g 2 + ions in an acidified aqueous solution precipitates

NTA Abhyas JEE Main 2020 Solution View → 49

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

NTA Abhyas JEE Main 2020 Solution View → 50

Gradual addition of potassium iodide solution to aqueous B i N O 3 3 solution initially produces a dark brown precipitate which dissolves in excess of KI to give a clear yellow sol

NTA Abhyas JEE Main 2020 Solution View → 51

On heating a mixture of N a C l , K 2 C r 2 O 7 and conc. H 2 S O 4 which of the following is formed ?

NTA Abhyas JEE Main 2020 Solution View → 52

Consider following reactions: The sum of molecular masses of gas A and B is ____________ u .

NTA Abhyas JEE Main 2020 Solution View → 53

The correct option(s) to distinguish nitrate salts of M n 2 + and C u 2 + taken separately is (are) (1) M n 2 + shows the characteristic green colour in the flame test (2) only C u

NTA Abhyas JEE Main 2020 Solution View → 54

Pick out the incorrect statement.

NTA Abhyas JEE Main 2020 Solution View → 55

Which salt on heating with conc. H 2 S O 4 gives violet vapours?

NTA Abhyas JEE Main 2020 Solution View → 56

Sodium fusion extract of an organic compound gives a blood red colouration with few drops of FeCl 3 solution. This indicates the presence of

NTA Abhyas JEE Main 2020 Solution View → 57

When phosphate radical react with ammonium molybdate, the colour of precipitate obtained is

NTA Abhyas JEE Main 2020 Solution View → 58

0.45 gm of an organic compound gave on combustion 0.792 gm of CO 2 and 0.324 gm of water. 0.24 gm of the same substance was Kjeldahlised and the ammonia liberated was absorbed in 5

NTA Abhyas JEE Main 2020 Solution View → 59

The correct match between item 'I' and item 'II' is Item I (Compound) Item II (Reagent) (1) Lysine (P) 1-naphthol (2) Furfural (Q) ninhydrin (3) Isopropyl alcohol (R) K M n O 4 (4)

NTA Abhyas JEE Main 2020 Solution View → 60

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

JEE Advanced 2019 Solution View → 61

An organic compound ‘A’ is oxidized with N a 2 O 2 followed by boiling with H N O 3 . The resultant solution is then treated with ammonium molybdate to yield a yellow p

JEE Main 2019 Solution View → 62

The correct option(s) to distinguish nitrate salts of M n 2 + a n d C u 2 + taken separately is(are)

JEE Advanced 2018 Solution View → 63

In the following reaction sequence in aqueous solution, the species X, Y and Z respectively, are S 2 O 3 2 − → Ag + X Clear Solution → Ag + Y White Precipitate → With time Z Black

JEE Advanced 2016 Solution View → 64

The reagent(s) that can selectively precipitate S 2 - from a mixture of S 2 - and S O 4 2 - in aqueous solution is (are)

JEE Advanced 2016 Solution View → 65

The pair(s) of ions where BOTH the ions are precipitated upon passing H 2 S gas in presence of dilute HCl, is (are)

JEE Advanced 2015 Solution View → 66

Paragraph: An aqueous solution of metal ion M 1 reacts separately with reagents Q and R in excess to give tetrahedral and square planar complexes, respectively. An aqueous solution

JEE Advanced 2014 Solution View → 67

Paragraph: An aqueous solution of metal ion M 1 reacts separately with reagents Q and R in excess to give tetrahedral and square planar complexes, respectively. An aqueous solution

JEE Advanced 2014 Solution View → 68

Paragraph: An aqueous solution of a mixture of two inorganic salts, when treated with dilute H C ?, gave a precipitate ( P ) and a filtrate ( Q ) . The precipitate P was found to d

JEE Advanced 2013 Solution View → 69

Upon treatment with ammoniacal H 2 S , the metal ion that precipitates as a sulphide is

JEE Advanced 2013 Solution View → 70

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

JEE Advanced 2012 Solution View → 71

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

JEE Advanced 2012 Solution View → 72

Which of the following halides react(s) with AgNO ₃( aq ) to give a precipitate that dissolves in Na ₂ ~S ₂ O ₃( aq ) ?

JEE Advanced 2012 Solution View → 73

A solution of a metal ion when treated with KI gives a red precipitate which dissolved in excess KI to give a colourless solution. Moreover, the solution of metal ion on treatment

JEE Advanced 2007 Solution View → 74

A solution when diluted with H ₂ O and boiled, it gives a white precipitate. On addition of excess NH ₄ Cl / NH ₄ OH , the volume of precipitate decreases leaving behind a white ge

JEE Advanced 2006 Solution View → 75

Brown ring test is used for the detection of which radical?

99 Percentile Qs Bank for JEE Main Solution View → 76

Give the correct order of initials T or F for following statements. Use T if statement is true and F if it is false. (i) Cu + undergoes disproportionation to Cu and Cu 2 + in aqueo

99 Percentile Qs Bank for JEE Main Solution View → 77

A red solid is insoluble in water. However, it becomes soluble if some K I is added to water. Heating the red solid in a test tube results in liberation of some violet coloured fum

99 Percentile Qs Bank for JEE Main Solution View → 78

A mixture of two salts is not water soluble but dissolves completely in dilute HCI to form a colourless solution. The mixture could be:

99 Percentile Qs Bank for JEE Main Solution View → 79

Passing H 2 S in to a mixture of M n 2 + , N i 2 + , C u 2 + and H g 2 + ions in an acidified aqueous solution precipitates

99 Percentile Qs Bank for JEE Main Solution View → 80

X → KOH Y (gas turns red litmus blue) + Z → Zn + KOH Y (gas) . X → Δ gas (does not support combustion) Identify (X) to (Z):

99 Percentile Qs Bank for JEE Main Solution View → 81

A chemistry student trying to detect the metallic ion in a salt, makes a paste on a clean platinum wire loop of the salt with concentrated H C l . When he takes a small amount of t

99 Percentile Qs Bank for JEE Main Solution View → 82

In what order the reagents N a 2 S , N a C l and N a l are added to an aqueous solution containing Ag + , Cu + 2 and Ni + 2 ions in order to precipitate A g + first C u + 2 second

99 Percentile Qs Bank for JEE Main Solution View → 83

Gradual addition of potassium iodide solution to aqueous B i N O 3 3 solution initially produces a dark brown precipitate which dissolves in excess of KI to give a clear yellow sol

99 Percentile Qs Bank for JEE Main Solution View → 84

The correct option(s) to distinguish nitrate salts of M n 2 + and C u 2 + taken separately is (are) (1) M n 2 + shows the characteristic green colour in the flame test (2) only C u

99 Percentile Qs Bank for JEE Main Solution View → 85

P b 2 + , C u 2 + , Z n 2 + and N i 2 + ions are present in a given acidic solution. On passing hydrogen sulphide gas through this solution, the available precipitate will contain

99 Percentile Qs Bank for JEE Main Solution View → 86

Pick out the incorrect statement.

99 Percentile Qs Bank for JEE Main Solution View → 87

In the following reaction sequence in aqueous solution, the species X, Y and Z respectively, are S 2 O 3 2 − → Ag + X Clear Solution → Ag + Y White Precipitate → With time Z Black

99 Percentile Qs Bank for JEE Main Solution View → 88

How do you characterizes P b C r O 4 ?

99 Percentile Qs Bank for JEE Main Solution View → 89

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

99 Percentile Qs Bank for JEE Main Solution View → 90

Which of the following cations cannot be detected by the flame test?

99 Percentile Qs Bank for JEE Main Solution View → 91

A chemistry student trying to detect the metallic ion in a salt, makes a paste on a clean platinum wire loop of the salt with concentrated H C l . When he takes a small amount of t

99 Percentile Qs Bank for JEE Main Solution View → 92

A salt of NaX → MgCl 2 white ppt. on boiling. Thus, anion X is:

99 Percentile Qs Bank for JEE Main Solution View → 93

Neutral ferric chloride is added to the aqueous solution of acetate. The blood red colour is obtained, it is due to the compound

99 Percentile Qs Bank for JEE Main Solution View → 94

The metal that produces red violet colour in the non-luminous flame is

99 Percentile Qs Bank for JEE Main Solution View → 95

Metal chloride A is soluble in hot water but insoluble in cold water. Select correct statement about A. Thus

99 Percentile Qs Bank for JEE Main Solution View → 96

A doctor by mistake administers a Ba(NO 3 ) 2 solution to a patient for radiography investigations. Which of the following should be given as the best to prevent the absorption of

99 Percentile Qs Bank for JEE Main Solution View → 97

Microcosmic salt bead test of salt X yields semi-translucent mass. Therefore it contains

99 Percentile Qs Bank for JEE Main Solution View → 98

The colour of C u C r 2 O 7 solution in water is green because

99 Percentile Qs Bank for JEE Main Solution View → 99

The carbonate of which of the following cation is insoluble in water?

99 Percentile Qs Bank for JEE Main Solution View → 100

A solution of metal hydroxide (MOH) with copper sulphate and mixed tartarate of metal M with another metal M 1 of the same group, is used in the detection of -CHO group. Metal M an

99 Percentile Qs Bank for JEE Main Solution View → 101

The borax bead is due to formation of

99 Percentile Qs Bank for JEE Main Solution View → 102

Which of the following isomers will give white precipitate with B a C l 2 solution?

99 Percentile Qs Bank for JEE Main Solution View → 103

Which metal will give blue colour metaborate in borax bead test?

99 Percentile Qs Bank for JEE Main Solution View → 104

Which of the following acid radical will not produce a precipitate with A g N O 3 solution?

99 Percentile Qs Bank for JEE Main Solution View → 105

Select pair(s) in which both produces same coloured ppt. with CrO ₄²⁻ ion

Most Important Selected Qs for JEE Advanced Solution View → 106

X( ~s ) dil HCl Y [ Na ₃ ( Fe ( CNO )₃( NO ) ] . Purple solution Gas Y has been allowed to react with following Biack species in neutralacidic medium (A) FeCl ₃ (B) CuSO ₄ (C) BaCl

Most Important Selected Qs for JEE Advanced Solution View → 107

Paragraph : Test (Q). A compound ' X ' was fused with Na metal and the extract gave a white precipitate with AgNO ₃ . The Lassaigne's extract gave red colouration with neutral FeCl

Most Important Selected Qs for JEE Advanced Solution View → 108

Paragraph: Metal nitrate (A) on heating decomposes, leaving a solid residue (B) which goes into solution with dilute HCl . The solution of (B) gives a white precipitate (C) with am

Most Important Selected Qs for JEE Advanced Solution View → 109

Paragraph: Metal nitrate (A) on heating decomposes, leaving a solid residue (B) which goes into solution with dilute HCl . The solution of (B) gives a white precipitate (C) with am

Most Important Selected Qs for JEE Advanced Solution View → 110

Paragraph : Test (Q). A compound ' X ' was fused with Na metal and the extract gave a white precipitate with AgNO ₃ . The Lassaigne's extract gave red colouration with neutral FeCl

Most Important Selected Qs for JEE Advanced Solution View → 111

An aqueous solution of a lead(II) salt is divided into two test tubes. Addition of potassium iodide to the first test tube produces a yellow precipitate 'X' which dissolves in boil

JEE Main Solution View → 112

An inorganic salt solution gives a white precipitate when treated with ( NH ₄)₂ CO ₃ in the presence of NH ₄ Cl and NH ₄ OH . The white precipitate is filtered and dissolved in dil

JEE Main Solution View → 113

An aqueous solution containing Pb²⁺ ions reacts with K₂CrO₄ to yield a yellow precipitate (A). When precipitate (A) is treated with hot concentrated NaOH , it dissolves to form a c

JEE Main Solution View → 114

An unknown transition metal salt X is subjected to the borax bead test. It forms a transparent blue bead when heated in an oxidizing flame and allowed to cool. When the same bead i

JEE Main Solution View → 115

An inorganic salt containing sulphur gives a characteristic purple colouration when its sodium carbonate extract is treated with sodium nitroprusside. The oxidation state of the ce

JEE Main Solution View → 116

An aqueous solution of an unknown metal salt is subjected to qualitative analysis. When H ₂ S gas is passed through the solution in the presence of dilute HCl , no precipitate is o

JEE Main Solution View → 117

When ammonia gas is passed through an alkaline solution of potassium tetraiodomercurate(II), a precipitate is formed. The colour and the chemical formula of this precipitate are re

JEE Main Solution View → 118

A Group IV transition metal cation M ²⁺ reacts with dimethylglyoxime in an ammoniacal medium to yield a brilliant red precipitate of a complex. The hybridization and the magnetic n

JEE Main Solution View → 119

Match List I with List II regarding the observations when aqueous solutions of the given metal cations are treated with potassium ferrocyanide, K ₄[ Fe ( CN )₆] . List I (Metal Cat

JEE Main Solution View → 120

A student is given an aqueous mixture containing Fe ³⁺ and Mg ²⁺ ions. Upon adding solid NH₄Cl followed by excess NH₄OH solution, a brown precipitate forms, but Mg ²⁺ remains in th

JEE Main Solution View →
Practice all Practical Chemistry questions in the app →