120 gram of an organic compound on combustion analysis gives 330 gram of carbon dioxide and 270 gram of water. % by mass of C and H in an organic compound is: 

1. 50% C and 50% H 
2. 60% C and 40% H 
3. 80%C  and 20% H 
4. 75% C and 25% H 
Subtopic:  Quantitative Analysis of Organic Compounds |
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The order of stability of given carbocations is: 

(A)
(B)
(C)
 
1. A > B > C  2. C > B> A 
3. B > A>C  4. B > C > A 
Subtopic:  Reaction Intermediates ; Preparation & Properties |
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In Duma's method of estimation of nitrogen, 0.2 gram of an organic compound gives 22.4 ml of nitrogen gas at STP. Percentage of nitrogen in the organic compound is: 
1. 20 %
2. 12 %
3. 18 %
4. 14 %
Subtopic:  Quantitative Analysis of Organic Compounds |
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The violet coloured complex formed in the Lassaigne's test is:

1. Na4[Fe(CN)5NOS]
2. Na2[Fe(CN)5NO]
3. K4[Fe(CN)6]
4. Fe4[Fe(CN)6]3
Subtopic:  Qualitative Analysis of Organic Compounds |
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0.5 gram of an organic compound gives 0.4 gram of dry AgBr ppt.
The percentage of Br in the given organic compound is:

[At. Wt. of Ag=108, At. Wt. of Br=80]

1. 45 %
2. 34 %
3. 25 %
4. 52 %
Subtopic:  Quantitative Analysis of Organic Compounds |
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In thin layer chromatography, which of the following is not used to visualise the separated layer?
1. Visualisation agent in the mobile phase
2. Spraying of suitable reagent
3. UV light
4. Solid I2
Subtopic:  Purification of Organic Compounds |
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If 0.450 grams of an organic compound containing Carbon, Hydrogen & Oxygen on complete combustion gives 0.735 grams CO2 and 0.45 grams of water, then the mass % of oxygen in the compound is:
(Report your answer to the nearest integer)
1. 31 2. 49
3. 44 4. 51 
Subtopic:  Quantitative Analysis of Organic Compounds |
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Identify the number of compounds, among the following, that have the same degree of unsaturation:
(A)  \(CH_3-CH=CH-C\equiv N \)
(B)  \(CH_3-N=CH-C\equiv CH \)
(C)  \(CH\equiv C-NH-CH=CH_2 \)
(D)  \(CH_2=CH-CH_2-C\equiv N \)

1. 2
2. 3
3. 0
4. 4
Subtopic:  Hybridisation & Structure of Carbon Compounds |
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Use the provided information in the following paper chromatogram.

Figure: Paper chromatography for compounds A and B.

The Rf value of A is Y×10–1. The value of Y is:

1. 2 2. 3
3. 4 4. 8
Subtopic:  Qualitative Analysis of Organic Compounds |
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Which of the following compounds is added to the sodium extract before the addition of silver nitrate for testing of halogens?

1. Nitric acid 2. Ammonia
3. Hydrochloric acid 4. Sodium hydroxide
Subtopic:  Qualitative Analysis of Organic Compounds |
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