Chemistry Question Bank

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

An organic compound is heated with HNO2 at 0oC 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.

Barfoed test is used for the distinguish:

Seliwanoff’s test is used for the distinguish:

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

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 compounds will answer Lassaigne’s test for nitrogen

Which of following will give Lassaigne’s test for nitrogen

The oxygen is estimated in the organic compound by

In Lassaigne’s test when both N and S are present, blood red colour obtained is due to the formation of–

Kjeldahl’s method is used in the estimation of–

Dumas method involves the determination of nitrogen content in the organic compound in form of–

Which of the following statements is wrong?

Sulphur is estimated by Carius method in the form of

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

Which Metal cyanide give a positive Lassaigne’s test for nitrogen?

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

What conclusion would you draw if during Lassaigne‘s test, a blood red colouration is obtained?

What type of organic compounds cannot be Kjeldahlised?

How is phosphorus estimated in an organic compound?

Will you get any precipitate if you add silver nitrate solution to chloromethane? If not, why?

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

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

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