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
Which of the following compounds will answer Lassaigne’s test for nitrogen
Which of following will give Lassaigne’s test for nitrogen
Which of the following is the test of carbohydrates?
Among the following which compound gives precipitate with AgNO₃ solution? (a) (b) (c)
Schiff test is used for the identification:
Which of the following statements is wrong?
Which of the following test can use for separation of alcohol and phenol?
Phenol and benzoic acid can be separated by
Silver salt method is used to determine molecular weight of
Sulphur is estimated by Carius method in the form of
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–
Phenols contains acidic H it reacts with KOH.
Esters undergo hydrolysis in Presence of KOH
Which of the following observations is correct and is used in the identification of carboxylic acids?
How will you separate iodine from sodium chloride?
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.
A mixture of acetone and CCl₄ can be separated by
Azeotropic distillation is used only to seperate azeotropes ie. constant boiling mixture. Here acetone & CCl₄ are not azeotropic mixture. Hence (a) is not correct.
How is phosphorus estimated in an organic compound?
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)
The molecular mass of a organic compound which contains only one nitrogen atom can be
The most suitable method of separation of 1: 1 mixture of ortho and para-nitrophenols is (NEET 2017)
In sodium fusion test of organic compounds N is converted to (Bihar CECE 2015)
Paper chromatography is an example of : (NEET 2020)