19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
When 0.32g of a compound is heated with conc. HNO₃ and BaCl₂, 0.932g BaSO₄ is obtained. The percentage of sulphur in the compound is
Sodium nitrorusside Na₂[Fe(CN)₅NO] is used as reagent for detection of ______ and the compound formed is ____.
The prussian blue colouration obtained in the test for nitrogen in the organic compound is
0.395 g of an organic compound by Carius method for the estimiation of sulphur gave 0.582 g of BaSO₄. The percentage of sulphur in the compound is–
Among the following which compound gives precipitate with AgNO₃ solution? (a) (b) (c)
Which of the following statements is wrong?
Phenol and benzoic acid can be separated by
Sulphur is estimated by Carius method in the form of
An organic compound is heated with HNO₂ at 0 °C and then the resulting solution is added to a solution -napthol whereby a brilliant red dye is produced. The observations indicate that the compound possesses.
Which of the following test can use for separation of alcohol and phenol?
Compounds which do not contain halogen but give positive Beilstein test?
How will you separate iodine from sodium chloride?
Which of the following compounds will answer Lassaigne’s test for nitrogen
Which of following will give Lassaigne’s test for nitrogen
Lassaigne’s test is not shown by diazonium salts. Why?
Phenols contains acidic H it reacts with KOH.
A mixture of acetone and CCl₄ can be separated by
Which of the following observations is correct and is used in the identification of carboxylic acids?
An organic compound contains C, H, N, S and Cl. For the detection of chlorine, the sodium extract of the compound is first heated with a few drops of concentrated HNO₃ and then AgNO₃ is added to get a white ppt. of Ag…
Azeotropic distillation is used only to seperate azeotropes ie. constant boiling mixture. Here acetone & CCl₄ are not azeotropic mixture. Hence (a) is not correct.
Paper chromatography has following mobile and stationary phases respectively (Bihar CECE 2015)
In the Lassaigne’s test for the detection of nitrogen in the organic compound, the appearance of blue coloured compound is (West Bengal PMT 2015)
An organic compound which produces a bluish green coloured flame on heating in presence of copper is (AIIMS 2014)
The most suitable method of separation of 1: 1 mixture of ortho and para-nitrophenols is (NEET 2017)
Lassaigne's test is used in qualitative analysis to detect (UK PMT 2014)