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
Phenol and benzoic acid can be separated by
Among the following which compound gives precipitate with AgNO₃ solution? (a) (b) (c)
Which of the following test is not used for protein/amino acids–
Which of the following test can use for separation of alcohol and phenol?
Which of the following is the test of carbohydrates?
Which of the following statements is wrong?
Which of the following observations is correct and is used in the identification of carboxylic acids?
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 compound Discharge bromine solution to colourless without evolving HBr?
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–
Which of the following compounds will answer Lassaigne’s test for nitrogen
Amines are basic. Therefore, do not react with KOH.
Which of following will give Lassaigne’s test for nitrogen
How will you separate iodine from sodium chloride?
Phenols contains acidic H it reacts with KOH.
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.
What conclusion would you draw if during Lassaigne‘s test, a blood red colouration is obtained?
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)
How is phosphorus estimated in an organic compound?
The most suitable method of separation of 1: 1 mixture of ortho and para-nitrophenols is (NEET 2017)
Paper chromatography has following mobile and stationary phases respectively (Bihar CECE 2015)
Paper chromatography is an example of : (NEET 2020)