19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Among the following, which statement is not correct? (a) || H C C OH O will not respond to haloform test
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
Sulphur is estimated by Carius method in the form of
Phenol and benzoic acid can be separated by
HCOOH and HCHO may be distinguished by
Among the following which compound gives precipitate with AgNO₃ solution? (a) (b) (c)
Acetic acid and CH₃COCl can be distinguished by
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.
Column I Column II (compound) (tests) (a) (p) 2,4-DNP test (b) (q) Yellow ppt. with NaOH + I₂ (c) O || CH C H (r) Red ppt. with Fehling’s solution (d) (s) Silver mirror with Tollen’s reagent
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
Dumas method involves the determination of nitrogen content in the organic compound in form of–
Which of the following test can use for separation of alcohol and phenol?
Azeotropic distillation is used only to seperate azeotropes ie. constant boiling mixture. Here acetone & CCl₄ are not azeotropic mixture. Hence (a) is not correct.
Seliwanoff’s test is used for the distinguish:
CCl₄ & acetone differ in their boiling Point. So it can be seperated through fractional distillation. Hence (b) is correct.
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)
Which of the following will give Tollen’s test?
The most suitable method of separation of 1: 1 mixture of ortho and para-nitrophenols is (NEET 2017)
In sodium fusion test of organic compounds N is converted to (Bihar CECE 2015)