IIT JEE/IIT JEE Qualitative Inorganic Analysis Sample Test,Sample questions

Question:
A glassy bead formed by heating borax on a platinum wite loop is




1.Sodium tetraborate

2.Sodium metaborate

3.Sodiummetaborate and boric anhydride

4.Boric anhydride and Sodium tetraborate.


Question:
A metal salt solution forms a yellow precipitate with potassium chromate in acetic acid and a white precipitate with dilute sulphuric acid but gives no precipitate with sodium chloride or iodide. The white precipitate obtained when sodium carbonate is added to the metal salt solution comsists f

1. Lead carbonate

2.Basic lead carbonate

3.Barium carbonate

4.Strontium carbonate.


Question:
A minute quantity of cupric salt is heated on borax bead in reducing foame of bunsen burner the colour of bead aftercooling will be




1.Blue

2.Brown red

3.Colourless

4.Green.


Question:
A moisten salt is rubbed with oxalic acid between the fingers and smells like vinegar. It indicates the presence of




1.Sulphur

2.Nitrate

3.Nitrite

4.Acetate.


Question:
A one litre flask is full of brownbromine vapour. The intensity of brown colour of vapour will not decrease appreciably on adding to the flask some




1.pieces of marble

2.animal charcoal powder

3.carbon tetrachloride

4.carbon disulphide.


Question:
Carbonates of the cation of group V are




1.black

2.green

3.white

4.yellow.


Question:
Certain Inorganic salt gives yellow precipitate with silver nitrate. The precipitate dissolves in dilute nitric acid as well as in ammonium hydroxide. The solution contains

1.Bromide ions

2.Iidide ions

3.Phosphate ions

4.Chromate ions.


Question:
Certain inorganic salt when introduced in flame produces crimson red colour. It indicates the presence of




1.Dichromate ion

2.Thiosulphate ion

3.Strontium ion

4.Calcium ion.


Question:
Formation of a rose-red precipitiate when a slightly alkaline solution of an inorganic salt is treated with dimethylglyoxime confirms the presence of




1.Cobalt

2.Zinc

3.Iron

4.Nickel.


Question:
If ammonium hydroxide solution is added to the aqueous solution of chromium sulphate what will form?




1.Greenish precipitate

2.Yellow precipitate

3.White turbidity

4.A clear transparent yellow solution.


Question:
In qualitative analysis of basic radicals hydrochloric acid preferred to nitric acid for preparing a solution of given substance. This is because


1.Zinc nitrate

2.Silver nitrate

3.nitrates are not decomposed to sulphides

4.hydrochloric acid is not an oxidising acidchlorides are easily converted to sulphides.


Question:
Nitric acid is generally not used for preparation of original solution in analysis of basic radicals because




 with the scheme of analysis.

1.It is a strong oxidising agent

2.It is reducing agent

3.It forms insoluble nitrates

4.None of them


Question:
Sodium sulphide react with sodium nitroprusside to form a purple colured compund. During the reaction the oxidation state of iron




1.Changes from + 2 to + 3

2.Changes from + 3 to + 2

3.Changes from + 2 to + 4

4.Remains unchanged.


Question:
Sulphuric acid is not used for the preparation of original solution in the analysis of basic radicals because




1.It forms insoluble sulphates with some of the basic radicals

2.It is a strong oxidising agent

3.It is a strong reducing agent

4.It decomposes many ot the anions.


Question:
The aqueous solution of which of the following reagent will give prussian blue coloured precipitate with an aqueous solution containing iorn (III) ions.




1.Potassium thiocyanate

2.Potassium hexacyanoferrate (II)

3.Potassium pyroantimonate

4.All of the above.


Question:
The metal whose salts do not give the borax bead test is




1.Cr

2.Ni

3.Pb

4.Mn.


Question:
The name of the blue product of the reaction between ferrous ion and ferricyanide ion is




1.Thenard blue

2.Turnbulls blue

3.Prussian blue

4.Ultramarine blue.


Question:
The salt of which of the following metal gives violet colour in borax bead test?




1.Fe

2.Ni

3.Co

4.Mn.


Question:
The salts of which of the following metal give white residue in charcoal cavity test but ash in cobalt nitrate test?




1.Copper

2.Zinc

3.Aluminium

4.Cobalt.


Question:
Two colourless solutions are mixed. A white precipitate results which turns black on addition of ammonia. The two solutions are respectively




1.Lunar caustic and hypo

2.Mercurous nitrate and sodium chloride

3.Washing soda and barium nitrate

4.Sodium bicarbonate and calcium nitrate


Question:
Whcih of the following is a white powder that is insoluble in water?




1.White vitriol

2.Mercury (I) chloride

3.Sodium carbonate

4.Calcium bicarbonate.


Question:
Whcih of the following pairs of reagents will give white precipitate with aqueous solution of sodium chloride?




1.Silver nitrate potassium chromate

2.Potassium chromate potassium cobaltinitrite

3.Silver nitrate Potassium pyroantimonate

4.Silver nitrate potassium oxalate.


Question:
Which of following salt contains two different metal atoms but gives test for only one in the aqueous solution?




1.Mohrs salt

2.Potash alum

3.Potassium ferrocyanide

4.Carnallite.


Question:
Which of the followign salts is coloured but gives wihte residue in dry heating test?




1.Berium carbonate

2.Barium chloride dihydrate

3.Copper (II) sulphate pentahydrate

4.Copper (II) chloride.


Question:
Which of the following halide is soluble in water ?




1.AgF

2.AgCl

3.AgBr

4.AgI.


Question:
Which of the following is insoluble in AcOH?




1.Clacium oxide

2.Clacium carbonate

3.oxalate

4.Clacium hydroxide.


Question:
Which of the following is not a preliminary test ?




1.Flame test

2.Borax bead test

3.Permanganate test

4.Brown ring test.


Question:
Which of the following is soluble in yellow ammonium sulphide ?




1.CuS

2.CdS

3.SnS

4.PbS.


Question:
Which of the following precipitate are dirty white in colour?




1.CoS

2.ZnS

3.CuS

4.MnS.


Question:
Which of the following salts does not liberate carbondioxide on treatment with dilute hydrochloric acid?




1.Bismuth carbonate

2.Copper carbonate

3.Calcium carhonate

4.Basic lead carhonate.


Question:
Which of the following sulphide is completely precipitated only when the acidic solution is made dilute ?




1.HgS

2.PbS

3.CdS

4.CuS.


Question:
Which of the following sulphides has lowest solubility product?




1.FeS

2.MnS

3.PbS

4.ZnS.


Question:
Which performing the flame test the paste of the salt in made in HCl because




1.HCl is a strong acid

2.HCl is non-oxidising acid

3.Chlorides are relatively volatile

4.HCl is cheaper.


Question:
Which sodium thiosulphate solution is shaken with iodine thiosulphate is changed to

1.Lead nitrate.

2.Sulphate ion

3.Tetrathionate ion

4.None of them


Question:
Which sulphides are soluble only in aqua regia?




1.NiS

2.CoS

3.HgS

4.All of the above.


Question:
Which types of salt produce crackcling noise in dry heating test?




1.Salts which have lot of water of crystallisation

2.Salts which are hygroscopic

3.Salts which have lost water of crystallisation

4.Salts which entrap mother liquor in crystals.


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