19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
KOH can be used as a drying agent for
Silver salt method is used to determine molecular weight of
Which of the following is the test of alcohol?
Which of the following compound Discharge bromine solution to colourless without evolving HBr?
Which of the following will give Tollen’s test?
Which of the following statements is wrong?
Schiff test is used for the identification:
Zeisel’s method is use for the determination of
Which of the following is the test of carbohydrates?
Which of the following is the test of primary amine?
Which of the following test is not used for protein/amino acids–
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 compounds will not give answer Lassaigne’s test for nitrogen (DPMT 2010)
In Carius method of estimation of halogens, 0.099 g organic compound gave 0.287. The percentage of chlorine in the compound will be (Haryana PMT 2010)
0.765 g of an acid gives 0.535 g of CO2 and 0.138 g of H2O. Then, the ratio of the percentage of carbon and hydrogen is (JCECE 2010)
In Kjeldahl's method, ammonia from 5g of food neutralizes 30 cm of 0.1 N acid. The percentage of nitrogen in the food is (KCET 2010)
In an organic compound, phosphorus is estimated as (AFMC 2010) (a) Mg P O (b) Mg PO (c) H PO (d) P O Ans. (a) Sol. In Carius method, the weighed organic compound (containing phosphorus) is heated with conc. HNO foll…
The compound formed in the positive test for nitrogen with the Lassaigne solution of an organic compound is (RPMT 2010) (a) 6 3 Fe Fe(CN) (b) Na Fe(CN) (c) Fe(CN) (d) Na Fe(CN) COS Ans. (a) Sol. 3Na Fe(CN) 4Fe…
Chemical formula of Prussian blue is (AFMC 2010) (a) Na Fe(CN) (b) K Fe(CN) (c) 6 3 Fe Fe(CN)
Violet coloured complex obtained in the detection of sulphur is (AFMC 2010) (a) Na Fe(NO)(CN) (b) Na Fe(ONS)(CN) (c) Na Fe(CN) NOS
Sublimation is a process in which a solid (KCET 2010)
Compounds which do not contain halogen but give positive Beilstein test?
Which Metal cyanide give a positive Lassaigne’s test for nitrogen?