Chemistry Question Bank

How will you separate iodine from sodium chloride?

The prussian blue colouration obtained in the test for nitrogen in the organic compound is

Which of the following test is used for quantitative estimation of N

If N and S both are present in an organic compound during Lassaigne’s test, both will change into

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…

A mixture of acetone and CCl₄ can be separated by

Sulphur is estimated by Carius method in the form of

Which of the following statements is wrong?

Compounds which do not contain halogen but give positive Beilstein test?

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.

The separation of the constituents of a mixture by column chromatography depends upon their

Lassaigne’s test is not shown by diazonium salts. Why?

Sodium nitrorusside Na₂[Fe(CN)₅NO] is used as reagent for detection of ______ and the compound formed 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.

Which of the following compounds gives blood red coloration when it Lassaigne’s extract is treated with alkali and ferric chloride? (DPMT 2009)

Which of the following compounds will not give answer Lassaigne’s test for nitrogen (DPMT 2010)

Phenols contains acidic H it reacts with KOH.

The most suitable method of separation of 1: 1 mixture of ortho and para-nitrophenols is (NEET 2017)

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)

Lassaigne's test is used in qualitative analysis to detect (UK PMT 2014)

Which of the following observations is correct and is used in the identification of carboxylic acids?

The Lassaigne's extract is boiled with conc. HNO₃ while testing for halogens. By doing so it (CBSE AIPMT 2011)

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)