|
(a) Explain the reason for the fusion of organic compund with Na metal for the detection of elements
|
|
1
|
671
|
August 14, 2016
|
|
Explain the principle of paper chromatography
|
|
0
|
4563
|
August 14, 2016
|
|
A sample of 0.50 g of an organic compound was treated according to Kjeldahl's method. The ammonia evolved was absorbed in 50 ml of 0.5 M ${{H}_{2}}$S${{O}_{4}}$. The residual acid required 60 ml of 0.5 M solution of NaOH for neutralisation. Find the perce
|
|
0
|
7120
|
August 14, 2016
|
|
An organic compound contains 69% carbon and 4.8% hydrogen, the remainder being oxygen. Calculate the masses of carbon dioxide and water produced when 0.20 g of this substance is subjected to complete combustion
|
|
0
|
4371
|
August 14, 2016
|
|
Give a brief description of the principles of the following technqiues taking an example in each case :
|
|
1
|
3915
|
August 14, 2016
|
|
(a) What do you understand by functional isomerism? Give an example
|
|
1
|
1504
|
August 14, 2016
|
|
Why is nitric acid added to sodium extract?
|
|
1
|
815
|
August 14, 2016
|
|
Why is impure glycerol purified by distillation under reduced pressure?
|
|
1
|
2218
|
August 14, 2016
|
|
Find out % of sulphur in the given compound
|
|
1
|
469
|
August 14, 2016
|
|
Calculte the percentage of chlorine present in the compound
|
|
1
|
490
|
August 14, 2016
|
|
Will C$C{{l}_{4}}$ give white ppt. of AgCl on heating it with silver nitrate ? Give reason for your answer
|
|
0
|
682
|
August 14, 2016
|
|
Explain why an organic liquid vaporises at a temperature below its boiling points in its steam distillation?
|
|
0
|
3889
|
August 14, 2016
|
|
Name a suitable technique of separation of the components from a mixture of calcium sulphate and camphor
|
|
0
|
3669
|
August 14, 2016
|
|
Explain the reason for the fusion of an organic compound with metallic sodium for testing nitrogen, sulphur and halogens
|
|
0
|
3450
|
August 14, 2016
|
|
Describe the method which can be used to separate two compounds with different solubilities in a solvent S
|
|
0
|
3414
|
August 14, 2016
|
|
Which of the two:
|
|
0
|
417
|
August 14, 2016
|
|
What type of organic compounds cannot be Kjeldahlised?
|
|
0
|
706
|
August 14, 2016
|
|
Define the term elution as applied to column chromatography
|
|
0
|
682
|
August 14, 2016
|
|
How will you separate a mixture of o-nitrophenol an p-nitrophenol?
|
|
0
|
2364
|
August 14, 2016
|
|
Can we use K in place of Na for prepare Lassaigne's extract?
|
|
0
|
483
|
August 14, 2016
|
|
Hydrazine does not give Lassaigne's test for nitrogen. Why?
|
|
0
|
4413
|
August 14, 2016
|
|
. Lassaigne's extract is prepared in distilled water and not in tap water. Explain
|
|
0
|
1944
|
August 14, 2016
|
|
Under what condition can the process of steam distillation be used?
|
|
0
|
969
|
August 14, 2016
|
|
Can we separate two liquids A (b.p. 353 K) and B (b.p. 365 K) present in a mixture by simple distil-lation?
|
|
0
|
596
|
August 14, 2016
|
|
The reaction is classified as:
|
|
1
|
508
|
August 14, 2016
|
|
The best and latest technique for isolation, purification and of separation of organic compounds is:
|
|
1
|
2668
|
August 14, 2016
|
|
In the Lassaigne's test for nitrogen in an organic compound, the Prussian blue colour is obtained due to the formation of:
|
|
1
|
3463
|
August 14, 2016
|
|
How can you separate a mixture of iodine and sodium chloride?
|
|
0
|
1586
|
August 14, 2016
|
|
Identify reagents underlined
|
|
1
|
536
|
August 14, 2016
|
|
What are electrophiles and nucleophiles?
|
|
1
|
9017
|
August 14, 2016
|