Empirical formula of a compound is CH2O and its vapour density is 30. Molecular formula of the compound is
The Lassaignes extract is boiled with conc. HNO3 while testing for halogens. By doing so it
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..
Which of the following doesnt give a ppt. with silver nitrate solution?
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..
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..
a ref solid is insoluble in water. however it becomes
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 aqueous solution of which Salt is colored?
A salt of NaX Mgcl/ white ppt. on boiling. thus,
Which of the following pair of the species has the same percentage of carbon
Brown ring is made for
a gas "X" is passed through water to from a saturated solution.
The best method for the separation of naphthalene and benzoic acid from their mixture is
29.5 mg of organic compound containing nitrogen was
Which of the following sulphides is yellow in colour ?
In Kjeldahls method, CuSO4 acts as
An organic compound contains C = 38.8%, H = 16% and N = 45.2% . Empirical formula of the compound is
The principle involved in the classification of basic radicals, is
A mixture of camphor and benzoic acid can be separated by
Which one of the following metallic hydroxides does not dissolve in sodium hydroxide solution?
A violet colour compound formed in detection of S in a compound is
How will you separate a solution (miscible) of benzene +CHCL3
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
Borax bead test of Cr (chromium) is
Fe (oh)3 can be separated from al (oh)3 by addition of
The decomposition of organic compounds in the presence of oxygen and without formation of odoriferous substances, is called
Which of the following radicals gives the apple green flame during flame test ?
Silver chloride dissolves in aqueous ammonia due to formation 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
What colour is imparted into the flame when lithium is burnt?
Upon treatment with ammoniacal H2S, the metal ion solutions that precipitates as a sulphide is
60g of a compound on analysis gave C = 24g, H = 4g and O = 32g. Its Empirical formula is
The incorrect statement in respect of chromyl chloride test is
In the brown ring test, the brown colour of the ring is due to
In Nesslers reagent for the detection of ammonia the active species is
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