In Dumas method for estimation of nitrogen 0.25g of an organic compound gave 40 ml of nitrogen collected at 300k temperature and 7..
Empirical formula of a compound is CH2O and its vapour density is 30. Molecular formula of the compound is
0.2595g of an organic substance in a quantitative analysis yielded 0.35g of the barium sulphate. The percentage of sulphur in the ..
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..
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..
A white-coloured inorganic compound, on heating, gives a gas which turns lime water milky and residue is left which is yellow when..
The Lassaignes extract is boiled with conc. HNO3 while testing for halogens. By doing so it
Which of the following doesnt give a ppt. with silver nitrate solution?
Brown ring is made for
When H2S gas is passed in a metal sulphate solution in presence of NH4OH, a white precipitate is produced. The metal is identified..
A mixture of camphor and benzoic acid can be separated by
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
The best method for the separation of naphthalene and benzoic acid from their mixture is
Which of the following pair of the species has the same percentage of carbon
In Kjeldahls method, CuSO4 acts as
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
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
Borax bead test of Cr (chromium) is
A salt of NaX Mgcl/ white ppt. on boiling. thus,
a gas "X" is passed through water to from a saturated solution.
a ref solid is insoluble in water. however it becomes
the aqueous solution of which Salt is colored?
29.5 mg of organic compound containing nitrogen was
Which of the following sulphides is yellow in colour ?
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
Silver chloride dissolves in aqueous ammonia due to formation of
The principle involved in the classification of basic radicals, is
Black precipitates form in many metal ion solutions, then which anion is used as a precipitating agent?
The yellow precipitate formed during the chromyl chloride test is chemically
MnO2 and H2SO4 added to NaCl, the greenish-yellow gas liberated is
A solution of metal ion when treated with Kl, gives a red
passing H2S gas into a mixture of Mn^2+, Ni^2+, Cu^2+, and
In Nesslers reagent for the detection of ammonia the active species is
Which of the following radicals gives the apple green flame during flame test ?
Upon treatment with ammoniacal H2S, the metal ion solutions that precipitates as a sulphide is
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
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