Practical Organic Chemistry

The compound formed in the positive test for nitrogen with the Lassaigne solution of an organic compound is

29.5 mg of an organic compound containing nitrogen was digested according to Kjeldahl’s method and the evolved ammonia was absorbed in 20 mL of 0.1 M HCl solution. The excess of the acid required 15 mL of 0.1 M NaOH solution for complete neutralization. The percentage of nitrogen in the compound is

The correct match between Item-I and Item-II is : .tg {border-collapse:collapse;border-spacing:0;border:none;} .tg td{font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:0px;overflow:hidden;word-break:normal;} .tg th{font-family:Arial, sans-serif;font-size:14px;font-weight:normal;padding:10px 5px;border-style:solid;border-width:0px;overflow:hidden;word-break:normal;} .tg .tg-bzci{font-size:20px;text-align:center;vertical-align:top} .tg .tg-p7ly{font-weight:bold;font-size:20px;text-align:center} .tg .tg-fbrz{font-weight:bold;font-size:20px;text-align:center;vertical-align:top} .tg .tg-4kyz{font-size:20px;text-align:center} Item-I (drug) Item-II (test) A Chloroxylenol P Carbylamine test B Norethindrone Q Sodium hydrogen carbonet test C Sulphapyridine R Ferric chloride test D Penicillin S Bayer's test

An organic compound 'A' is oxidizod with Na₂O₂ followed by boiling with HNO₃. The resultant solution is then treated with ammonium molybdate to yield a yellow precipitate. Based on above observation, the element present in the given compound is:

If you spill a chemical toilet cleaning liquid on your hand, your first aid would be

Which of the following compound is added to the sodium extract before addition of silver nitrate for testing of halogens?

Which of the following is 'a' FALSE statement ?

Seliwanoff test and Xanthoproteic test are used for the identification of ___________ and ________ respectively.

Match List - I with List - II : List - I Test/Reagents/Observation(s) List - II Species detected (a) Lassaigne's Test (i) Carbon (b) Cu(II) oxide (ii) Sulphur (c) Silver nitrate (iii) N, S, P, and halogen (d) The sodium fusion extract gives black precipitate with acetic acid and lead acetate (iv) Halogen Specifically The correct match is :

Which one of the following complexes is violet in colour?

Acidic ferric chloride solution on treatment with excess of potassium ferrocyanide gives a Prussian blue coloured colloidal species. It is :

In Kjeldahl's method for estimation of nitrogen, $\mathrm{CuSO}_4$ acts as :

Compound that will give positive Lassaigne's test for both nitrogen and halogen is :

When silver nitrate solution is added to potassium iodide solution then the sol produced is :

The technique used for purification of steam volatile water immiscible substances is :

The fragrance of flowers is due to the presence of some steam volatile organic compounds called essential oils. These are generally insoluble in water at room temperature but are miscible with water vapour in vapour phase. A suitable method for the extraction of these oils from the flowers is -

Match List I with List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px; overflow:hidden;padding:10px 5px;word-break:normal;} .tg th{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px; font-weight:normal;overflow:hidden;padding:10px 5px;word-break:normal;} .tg .tg-c3ow{border-color:inherit;text-align:center;vertical-align:top} .tg .tg-7btt{border-color:inherit;font-weight:bold;text-align:center;vertical-align:top} .tg .tg-0pky{border-color:inherit;text-align:left;vertical-align:top} LIST I (Test) LIST II (Observation) A. $$\mathrm{Br_2}$$ water test I. Yellow orange or orange red precipitate formed B. Ceric ammonium nitrate test II. Reddish orange colour disappears C. Ferric chloride test III. Red colour appears D. 2, 4 - DNP test IV. Blue, Green, Violet or Red colour appear Choose the correct answer from the options given below:

Which of the following statements are correct? A. Glycerol is purified by vacuum distillation because it decomposes at its normal boiling point. B. Aniline can be purified by steam distillation as aniline is miscible in water. C. Ethanol can be separated from ethanol water mixture by azeotropic distillation because it forms azeotrope. D. An organic compound is pure, if mixed M.P. is remained same. Choose the most appropriate answer from the options given below :

For standardizing NaOH solution, which of the following is used as a primary standard ?