Qualitative Analysis

Question 1

Brisk effervescence and turns lime water milky

Answer 1

Carbonate ion

Question 2

Chromium Chloride Test is not given by

Answer 2

1. Chlorides of Hg, Sn, Ag, Pb and Sb;
2. Bromides
3. Iodides

Question 3

Brown Ring Test

Answer 3

Nitrate Ion

Question 4

Barium Chloride Test

Answer 4

Sulphate Ion

Question 5

Ammonium Molybdate test

Answer 5

Phosphate Ion

Question 6

Mixture + conc. HNO3 + ammonium Molybdate

Answer 6

Canary yellow precipitate

Phosphate ion confirmed

Question 7

Mixture + BaCl2 soln. + conc. HCl

Answer 7

BARIUM CHLORIDE TEST
White ppt. Insoluble in mineral acids

Sulphate ion confirmed

Question 8

Mixture + K2Cr2O7 + conc. H2SO4

Pass over NaOH

Treat with lead acetate

Answer 8

CHROMYL CHLORIDE TEST
Orange-yellow vapours of chromyl chloride (CrO2Cl2)

Forms yellow ppt of lead chromate

Chloride ion confirmed

Question 9

Interfering Acid Radicals

Answer 9

1. Borate
2. Oxalate
3. Fluoride
4. Phosphate

they interfere in usual test of basic radicals

Question 10

Group 1 Reagent

Answer 10

Dil. HCl

Question 11

Group 2 Reagent

Answer 11

Dil. H2SO4 and pass H2S

Question 12

Group 3 Reagent

Answer 12

NH4OH in presence of NH4Cl and add dil. HNO3

Question 13

Group 4 reagent

Answer 13

NH4OH with NH4Cl and pass through H2S

Question 14

Group 5 reagent

Answer 14

NH4OH with NH4Cl and (NH4)2CO3

Question 15

Group 6 reagent

Answer 15

Sodium Hydrogen Phosphate

Na2HPO4

Question 16

Nessler’s Reagent Test

Answer 16

Ammonium Ion

Brown ppt

Question 17

Borax Bead Test

Answer 17

Platinum wire heated + dipped in borax powder + heat

Question 18

Formula of borax bead

Answer 18

Sodium metaborate

NaBO2

Transparent glassy bead

Question 19

Borax Bead Test—blue

Answer 19

Cobalt

Question 20

Borax Bead test—light blue/green and colourless/red

Answer 20

Copper

Question 21

Borax Bead Test—-yellow brown/bottle green

Answer 21

Iron (Fe+3)

Question 22

Borax Bead Test—green and green

Answer 22

Chromium

Question 23

White ppt. + dil. HCl

+ H2O + KI

Observation?

Answer 23

Red ppt.

Lead

Question 24

Brown ppt in Nessler’s Reagent Test is due to formation of?

Answer 24

Iodide of Millon’s Base

Question 25

Sodium Carbonate Extract + Sodium Nitopruside | Observation?

Answer 25

Purple colour of Na4[Fe(CN)5NOS] Due to presence of Sulphide Ion(S-2)

Question 26

Mercurous Chloride (HgCl) + NH4OH Observation?

Answer 26

Black ppt of Hg

Question 27

Insoluble in Dil. HNO3

Answer 27

HgS

Question 28

Cr(OH)3 + NaOH + Na2O2 | Observation?

Answer 28

Yellow colour of Na2CrO4

Question 29

Metal Ion soln. + Cobalt(ll)thiocyanate Deep blue soln.

Answer 29

Hg+2

Question 30

Mercurous salt + Cobalt(ll)thiocyanate

Answer 30

Deep blue solution

Question 31

A compound that does not impart colour to the flame

Answer 31

KI

Question 32

Reaction of bismuth and antimony chlorides with water?

Answer 32

White ppt. Of oxychloride formed | BiOCl for bismuth

Question 33

Type of compound that gives blood red colour with FeCl3

Answer 33

a compound containing N and S This forms NaSCN Which on reaction with FeCl3 gives FeSCN(blood red)

Question 34

An ion that cannot be precipitated by both HCl and H2S

Answer 34

Sn+2

Question 35

Fe+3 soln. + PO4 -3 soln.

Answer 35

Ppt of FePO4 formed

Question 36

Silver salt insoluble in water

Answer 36

Ag2SO4

Question 37

Active species in Nessler's Reagent for Detecting NH4+ ion?

Answer 37

[HgI4]-2