The best method for the separation of naphthalene and benzoic acid from their mixture is
A mixture of camphor and benzoic acid can be separated by
Which of the following pair of the species has the same percentage of carbon
A violet colour compound formed in detection of S in a compound is
The decomposition of organic compounds in the presence of oxygen and without formation of odoriferous substances, is called
If a compound on analysis was found to contain C = 18.5%, h
H = 1.55%, CL = 55.04% and O = 24.81%, then its empirical formula is
An organic compound contains C = 38.8%, H = 16% and N = 45.2% . Empirical formula of the compound is
How will you separate a solution (miscible) of benzene +CHCL3
An organic compound containing C,H and N gave following analysis : C = 40% , H = 13.33% and N = 46.67%. Its empirical formula woul..
60g of a compound on analysis gave C = 24g, H = 4g and O = 32g. Its Empirical formula is
A salt on treatment with dil. HCl gives a pungent smelling gas and a yellow precipitate. The salt gives green flame test and a yel..
Borax bead test of Cr (chromium) is
When H2S gas is passed in a metal sulphate solution in presence of NH4OH, a white precipitate is produced. The metal is identified..
A white-coloured inorganic compound, on heating, gives a gas which turns lime water milky and residue is left which is yellow when..
To an aqueous solution containing anions a few drops of acidified KMnO4 are added. Which one of the following anions, if present w..
Brown ring is made for
A white crystalline salt A reacts with dilute HCl to liberate a suffocating gas B and also forms a yellow precipitate. The gas B t..
Silver chloride dissolves in aqueous ammonia due to formation of
Which of the following doesnt give a ppt. with silver nitrate solution?
The hydroxide insoluble in NH4OH + NH4Cl is
In Nesslers reagent for the detection of ammonia the active species is
The yellow precipitate formed during the chromyl chloride test is chemically
MnO2 and H2SO4 added to NaCl, the greenish-yellow gas liberated is
Which one of the following metallic hydroxides does not dissolve in sodium hydroxide solution?
The principle involved in the classification of basic radicals, is
Fe^2+ ion is distinguished from Fe^3+ ion by
The incorrect statement in respect of chromyl chloride test is
In the brown ring test, the brown colour of the ring is due to
Upon treatment with ammoniacal H2S, the metal ion solutions that precipitates as a sulphide is
Which of the following sulphides is yellow in colour ?
In borax bead test, the coloured ions give characteristic coloured beads due to the formation of
What colour is imparted into the flame when lithium is burnt?
Black precipitates form in many metal ion solutions, then which anion is used as a precipitating agent?
Fe(OH)3 can be separated from Al(OH)3 by the addition of
Which of the following radicals gives the apple green flame during flame test ?
An aqueous solution contains the following ions, Hg 2/2+ , Hg/2+, pb/2+, Cd/2+ . Which of the following
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