19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Zeisel’s method is use for the determination of
Schiff test is used for the identification:
Which of the following will give Tollen’s test?
Which of the following compound Discharge bromine solution to colourless without evolving HBr?
Which of the following is the test of alcohol?
Silver salt method is used to determine molecular weight of
Phenol and benzoic acid can be separated by
Sublimation is a process in which a solid (KCET 2010)
Which of the following compounds gives blood red coloration when it Lassaigne’s extract is treated with alkali and ferric chloride? (DPMT 2009)
A hydrocarbon contains 80% carbon. What is the empirical formula of the compound? (KCET 2009 )
1 percent composition of an organic compound A is carbon: 85.71% and hydrogen 14.20% . Its vapour density is 14. Consider the following reaction sequence Cl /H O (i) KCN/EtOH (ii) H O A B C -> -> Identify C (EAMCET 2…
The masses of carbon, hydrogen and oxygen in an organic compound are in the ratio 6: 1: 8 respectively. Which of the following pairs of formulae correspond to the above information? (Kerala CEE 2009) (a) CH O and CH …
In the Duma's method of estimation of nitrogen, the nitrogen in the organic compound is finally converted into (Kerala CEE 2009)
In an organic compound, C 68.5% and H 4.91% . Which empirical formula is correct for it? (CPMT 2009) (a) C H (b) C H O (c) C H O (d) C H O Ans. (b) Sol. Element At. Percent No. of Simple molar wt. composition moles …
A hydrocarbon has carbon and hydrogen. Its molecular weight is 28. Its possible formula would be (AFMC 2009) (a) C H (b) C H (c) CH (d) C H Ans. (b) Sol. Compound Molecular weight C H 12 3 x C H x CH C H x Henc…
Assertion (A): S || NH – C– NH gives red color in Lassaigne’s test Reason (R): Compounds having N along with C give red colour in Lassaigne’s test. (AIIMS2009)
Assertion (A): Oils are purified by steam distillation. Reason (R): The compounds which decompose at their boiling points can be purified by steam distillation. (AIIMS2008)
Anthracene can be purified by
An organic liquid decomposes below its boiling point. How will you purify it?
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)