|
(a) Explain the reason for the fusion of organic compund with Na metal for the detection of elements
|
|
1
|
736
|
August 14, 2016
|
|
Explain the principle of paper chromatography
|
|
0
|
4634
|
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
|
7263
|
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
|
4483
|
August 14, 2016
|
|
Give a brief description of the principles of the following technqiues taking an example in each case :
|
|
1
|
3997
|
August 14, 2016
|
|
(a) What do you understand by functional isomerism? Give an example
|
|
1
|
1558
|
August 14, 2016
|
|
Why is nitric acid added to sodium extract?
|
|
1
|
877
|
August 14, 2016
|
|
Why is impure glycerol purified by distillation under reduced pressure?
|
|
1
|
2280
|
August 14, 2016
|
|
Find out % of sulphur in the given compound
|
|
1
|
510
|
August 14, 2016
|
|
Calculte the percentage of chlorine present in the compound
|
|
1
|
531
|
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
|
752
|
August 14, 2016
|
|
Explain why an organic liquid vaporises at a temperature below its boiling points in its steam distillation?
|
|
0
|
3943
|
August 14, 2016
|
|
Name a suitable technique of separation of the components from a mixture of calcium sulphate and camphor
|
|
0
|
3749
|
August 14, 2016
|
|
Explain the reason for the fusion of an organic compound with metallic sodium for testing nitrogen, sulphur and halogens
|
|
0
|
3490
|
August 14, 2016
|
|
Describe the method which can be used to separate two compounds with different solubilities in a solvent S
|
|
0
|
3471
|
August 14, 2016
|
|
Which of the two:
|
|
0
|
457
|
August 14, 2016
|
|
What type of organic compounds cannot be Kjeldahlised?
|
|
0
|
758
|
August 14, 2016
|
|
Define the term elution as applied to column chromatography
|
|
0
|
736
|
August 14, 2016
|
|
How will you separate a mixture of o-nitrophenol an p-nitrophenol?
|
|
0
|
2417
|
August 14, 2016
|
|
Can we use K in place of Na for prepare Lassaigne's extract?
|
|
0
|
537
|
August 14, 2016
|
|
Hydrazine does not give Lassaigne's test for nitrogen. Why?
|
|
0
|
4469
|
August 14, 2016
|
|
. Lassaigne's extract is prepared in distilled water and not in tap water. Explain
|
|
0
|
2015
|
August 14, 2016
|
|
Under what condition can the process of steam distillation be used?
|
|
0
|
1029
|
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
|
649
|
August 14, 2016
|
|
The reaction is classified as:
|
|
1
|
549
|
August 14, 2016
|
|
The best and latest technique for isolation, purification and of separation of organic compounds is:
|
|
1
|
2725
|
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
|
3497
|
August 14, 2016
|
|
How can you separate a mixture of iodine and sodium chloride?
|
|
0
|
1655
|
August 14, 2016
|
|
Identify reagents underlined
|
|
1
|
582
|
August 14, 2016
|
|
What are electrophiles and nucleophiles?
|
|
1
|
9330
|
August 14, 2016
|