Chemistry Question Bank

0.15 g of an organic compound gave 0.12 g of AgBr by Carius method. The percentage of bromine in the compound is

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)

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

Which of the following test can use for separation of alcohol and phenol?

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.

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

Steam distillation is used only in case of steam volatile substance. Hence (c) is not correct. 4. Vaccum distillation is used in liquids which decompose at their boiling Point. Hence (d) is incorrect.

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.

Sublimation is a process in which a solid (KCET 2010)

A mixture of acetone and CCl₄ can be separated by

1.2g of organic compound on Kjeldahlisation liberates ammonia which consumes 30 cm3 of 1N HCl. The percentage of nitrogen in the organic compound is (KCET 2011)

Azeotropic distillation is used only to seperate azeotropes ie. constant boiling mixture. Here acetone & CCl₄ are not azeotropic mixture. Hence (a) is not correct.

Presence of halogen in organic compounds can be detected by using (UP CPMT 2012)

CCl₄ & acetone differ in their boiling Point. So it can be seperated through fractional distillation. Hence (b) is correct.

Paper chromatography is an example of : (NEET 2020)

The [NH(CH₂)₆NHCO(CH₂)₄CO]n is a

is a polymer which have monomer units as (a) (b) (c) (d)