0.2595g of an organic substance in a quantitative analysis yielded 0.35g of the barium sulphate. The percentage of sulphur in the ..
The Lassaignes extract is boiled with conc. HNO3 while testing for halogens. By doing so it
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..
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
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..
In Kjeldahls method, CuSO4 acts as
A white-coloured inorganic compound, on heating, gives a gas which turns lime water milky and residue is left which is yellow when..
Which of the following pair of the species has the same percentage of carbon
The best method for the separation of naphthalene and benzoic acid from their mixture is
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
A mixture of camphor and benzoic acid can be separated by
When H2S gas is passed in a metal sulphate solution in presence of NH4OH, a white precipitate is produced. The metal is identified..
Which of the following doesnt give a ppt. with silver nitrate solution?
To an aqueous solution containing anions a few drops of acidified KMnO4 are added. Which one of the following anions, if present w..
How will you separate a solution (miscible) of benzene +CHCL3
An organic compound contains C = 38.8%, H = 16% and N = 45.2% . Empirical formula of the compound is
An organic compound containing C,H and N gave following analysis : C = 40% , H = 13.33% and N = 46.67%. Its empirical formula woul..
Borax bead test of Cr (chromium) is
the aqueous solution of which Salt is colored?
60g of a compound on analysis gave C = 24g, H = 4g and O = 32g. Its Empirical formula is
In Nesslers reagent for the detection of ammonia the active species is
Silver chloride dissolves in aqueous ammonia due to formation of
The principle involved in the classification of basic radicals, is
A solution of metal ion when treated with Kl, gives a red
MnO2 and H2SO4 added to NaCl, the greenish-yellow gas liberated is
Upon treatment with ammoniacal H2S, the metal ion solutions that precipitates as a sulphide is
Which of the following sulphides is yellow in colour ?
A salt of NaX Mgcl/ white ppt. on boiling. thus,
The yellow precipitate formed during the chromyl chloride test is chemically
In the brown ring test, the brown colour of the ring is due to
Black precipitates form in many metal ion solutions, then which anion is used as a precipitating agent?
Which one of the following metallic hydroxides does not dissolve in sodium hydroxide solution?
In borax bead test, the coloured ions give characteristic coloured beads due to the formation of
The hydroxide insoluble in NH4OH + NH4Cl is
a gas "X" is passed through water to from a saturated solution.
Which of the following radicals gives the apple green flame during flame test ?
the reagents NH4 CL and aqueous NH3 will precipitate
a ref solid is insoluble in water. however it becomes
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