19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Which of following will give Lassaigne’s test for nitrogen
Which of the following statements is wrong?
Which of the following compounds will answer Lassaigne’s test for nitrogen
Acids reacts with KOH to form salt.
Sulphur is estimated by Carius method in the form of
Phenol and benzoic acid can be separated by
Among the following which compound gives precipitate with AgNO₃ solution? (a) (b) (c)
Which Metal cyanide give a positive Lassaigne’s test for nitrogen?
Compounds which do not contain halogen but give positive Beilstein test?
How will you separate iodine from sodium chloride?
Phenols contains acidic H it reacts with KOH.
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.
A mixture of acetone and CCl₄ can be separated by
Which of the following test can use for separation of alcohol and phenol?
0.15 g of an organic compound gave 0.12 g of AgBr by Carius method. The percentage of bromine in the compound is
Azeotropic distillation is used only to seperate azeotropes ie. constant boiling mixture. Here acetone & CCl₄ are not azeotropic mixture. Hence (a) is not correct.
In Duma's method of estimation of nitrogen 0.35 g of an organic compound gave 55 mL of nitrogen collected at 300K temperature and 715 mm pressure. The percentage composition of nitrogen in the compound would be (Aqueo…
CCl₄ & acetone differ in their boiling Point. So it can be seperated through fractional distillation. Hence (b) is correct.
In a Dumas nitrogen estimation 0.3 g of an organic compound gave 50 cm3 of nitrogen collected at 300 K and 715 mm pressure. The percentage of nitrogen in the compound (vapour pressure of water at 300K is 15 mm) is
The most suitable method of separation of 1: 1 mixture of ortho and para-nitrophenols is (NEET 2017)
Which of the following compound is/are purified by sublimation?
Paper chromatography is an example of : (NEET 2020)
The best method for the sepration of naphthalene and benzoic acid from their mixture is
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)