Empirical formula of a compound is CH2O and its vapour density is 30. Molecular formula of the compound is
In Dumas method for estimation of nitrogen 0.25g of an organic compound gave 40 ml of nitrogen collected at 300k temperature and 7..
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 ..
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..
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?
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
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
A mixture of camphor and benzoic acid can be separated by
a gas "X" is passed through water to from a saturated solution.
In Kjeldahls method, CuSO4 acts as
the aqueous solution of which Salt is colored?
Which of the following sulphides is yellow in colour ?
a ref solid is insoluble in water. however it becomes
A salt of NaX Mgcl/ white ppt. on boiling. thus,
A violet colour compound formed in detection of S in a compound is
29.5 mg of organic compound containing nitrogen was
How will you separate a solution (miscible) of benzene +CHCL3
Borax bead test of Cr (chromium) is
The principle involved in the classification of basic radicals, is
The decomposition of organic compounds in the presence of oxygen and without formation of odoriferous substances, is called
Which one of the following metallic hydroxides does not dissolve in sodium hydroxide solution?
Fe (oh)3 can be separated from al (oh)3 by addition of
The yellow precipitate formed during the chromyl chloride test is chemically
An organic compound contains C = 38.8%, H = 16% and N = 45.2% . Empirical formula of the compound is
Black precipitates form in many metal ion solutions, then which anion is used as a precipitating agent?
Silver chloride dissolves in aqueous ammonia due to formation of
MnO2 and H2SO4 added to NaCl, the greenish-yellow gas liberated is
60g of a compound on analysis gave C = 24g, H = 4g and O = 32g. Its Empirical formula is
Upon treatment with ammoniacal H2S, the metal ion solutions that precipitates as a sulphide is
passing H2S gas into a mixture of Mn^2+, Ni^2+, Cu^2+, and
The incorrect statement in respect of chromyl chloride test 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..
Which of the following radicals gives the apple green flame during flame test ?
A solution of metal ion when treated with Kl, gives a red
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