Chemistry Question Bank

CHO and CH3CHO can be distinguished by

HCOOH and HCHO may be distinguished by

Compound A reacts with CHCl3 and KOH and gives an offesnive smelling compound. A can be

Which of the following reactions occur during the detection of nitrogen in organic substances by Lassaigne’s test?

Which of the following organic compounds will give white precipitate with AgNO3?

An organic compound has the structure It will give

Phenol can be distinguished from ethanol by

To separate a mixture of amines from each other, one should follow:

Among the following, which statement is not correct? (a) || H C C OH O will not respond to haloform test

Phenol + Phthalic anhydride Conc.H SO fusion B. -> B gives which of the following colour in alkaline medium?

Paper chromatography is an example of : (NEET 2020)

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

Assertion (A): A mixture of o-nitrophenol and p- nitrophenol can be separated by steam distillation Reason (R): p-Nitrophenol is steam volatile while o- nitrophenol is not steam volatile. (AIIMS 2015)

0.30 g of an organic compound containing C, H and O on combustion yields 0.44 g CO2 and 0.18 g H2O. If one mole of compound weighs 60, then molecular formula of the compound is (Karnataka CET 2015)

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)

In sodium fusion test of organic compounds N is converted to (Bihar CECE 2015)

Paper chromatography has following mobile and stationary phases respectively (Bihar CECE 2015)

An organic compound which produces a bluish green coloured flame on heating in presence of copper is (AIIMS 2014)

Camphor is purified by (Kerala PMT 2014)

In the Kjeldahl's method for estimation of nitrogen present in a soil sample, ammonia evolved from 0.75g of sample neutralised 10 mL of 1M H SO . The percentage of nitrogen in the soil is (CBSE AIPMT 2014)

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

In which among the following compounds presence of nitrogen cannot be detected by Lassaigne's method? (MHT CET 2014)

Which one of the following methods can be used to separate a mixture of ortho and para-nitrophenols? (EAMCET 2014)

A liquid which decomposes at its boiling point can be purified by (Manipal 2014)

Correct pair of compounds, which gives blue colouration/ precipitate and white precipitate, respectively, when their Lassaigne’s test is separately done is (West Bengal JEE 2013)