Empirical formula of a compound is CH2O and its vapour density is 30. Molecular formula of the compound 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..
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
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..
Which of the following doesnt give a ppt. with silver nitrate solution?
A white-coloured inorganic compound, on heating, gives a gas which turns lime water milky and residue is left which is yellow when..
When H2S gas is passed in a metal sulphate solution in presence of NH4OH, a white precipitate is produced. The metal is identified..
Brown ring is made for
Which of the following pair of the species has the same percentage of carbon
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
A mixture of camphor and benzoic acid can be separated by
In Kjeldahls method, CuSO4 acts as
the aqueous solution of which Salt is colored?
A violet colour compound formed in detection of S in a compound is
a gas "X" is passed through water to from a saturated solution.
29.5 mg of organic compound containing nitrogen was
A salt of NaX Mgcl/ white ppt. on boiling. thus,
Which of the following sulphides is yellow in colour ?
Borax bead test of Cr (chromium) is
a ref solid is insoluble in water. however it becomes
The decomposition of organic compounds in the presence of oxygen and without formation of odoriferous substances, is called
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
The yellow precipitate formed during the chromyl chloride test is chemically
Fe (oh)3 can be separated from al (oh)3 by addition of
MnO2 and H2SO4 added to NaCl, the greenish-yellow gas liberated is
passing H2S gas into a mixture of Mn^2+, Ni^2+, Cu^2+, and
60g of a compound on analysis gave C = 24g, H = 4g and O = 32g. Its Empirical formula is
Which one of the following metallic hydroxides does not dissolve in sodium hydroxide solution?
An organic compound containing C,H and N gave following analysis : C = 40% , H = 13.33% and N = 46.67%. Its empirical formula woul..
Silver chloride dissolves in aqueous ammonia due to formation of
The principle involved in the classification of basic radicals, is
Upon treatment with ammoniacal H2S, the metal ion solutions that precipitates as a sulphide is
A solution of metal ion when treated with Kl, gives a red
Black precipitates form in many metal ion solutions, then which anion is used as a precipitating agent?
Which of the following radicals gives the apple green flame during flame test ?
The incorrect statement in respect of chromyl chloride test is
In borax bead test, the coloured ions give characteristic coloured beads due to the formation of
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