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Q. No.80 ml unknown gaseous hydrocarbon sparked in presence of 264 ml of \(O_2\) gas. After complete combustion gaseous mixture cooled down to 278 K & 1 atm then it’s volume is equal to 224 ml. After passing the mixture through aqueous KOH volume becomes 64 ml then formula of hydrocarbon will be :
1. \(C_2H_2\)
2. \(C_2H_6\)
3. \(C_2H_4\)
4. \(C_4H_4 \text { or None}\)
1. \(C_2H_2\)
2. \(C_2H_6\)
3. \(C_2H_4\)
4. \(C_4H_4 \text { or None}\)
Subtopic: Quantitative Analysis of Organic Compounds |
Level 4: Below 35%
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Hints
Identify the correct statements among the following:
Statement-A : Propanal & propanone are functional group isomers.
Statement-B : Ethoxy ethane and methoxy propane are metamers.
Statement-C : But-2-ene show optical isomerism
Statement-D : But-2-ene and But-1-ene are functional isomers.
Statement E: Pentane & 2,2-dimethyl propane are chain isomers
Choose the correct option:
1. A, B, E
2. A, B, C
3. B, D, E
4. A, B
Statement-A : Propanal & propanone are functional group isomers.
Statement-B : Ethoxy ethane and methoxy propane are metamers.
Statement-C : But-2-ene show optical isomerism
Statement-D : But-2-ene and But-1-ene are functional isomers.
Statement E: Pentane & 2,2-dimethyl propane are chain isomers
Choose the correct option:
1. A, B, E
2. A, B, C
3. B, D, E
4. A, B
Subtopic: Structural Isomers |
Level 4: Below 35%
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In Carius method, 0.75 gm of an organic compound gave 1.2 gm of barium sulphate, find % of sulphur if the molar mass of S is \(32~ gm~ mol^{–1}\) :
[Given: Molar mass of barium sulphate is \(233~ gm~ mol^{–1}\)]
1. 16.48%
2. 4.55%
3. 21.97%
4. 10.30%
[Given: Molar mass of barium sulphate is \(233~ gm~ mol^{–1}\)]
1. 16.48%
2. 4.55%
3. 21.97%
4. 10.30%
Subtopic: Quantitative Analysis of Organic Compounds |
Level 4: Below 35%
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Hints
Match the List-I with List-II:
| List-I | List-II | ||
| P. | Cis-2-Butene, trans-2-butene |
1. | Functional isomers |
| Q. | Diethyl ether, Butanol |
2. | Stereoisomers |
| R. | 1-Butene, 2-Butene |
3. | Position isomers |
| S. | n-Pentane, Isopentane |
4. | Chain isomers |
| P | Q | R | S | |
| 1. | 2 | 3 | 4 | 1 |
| 2. | 2 | 1 | 3 | 4 |
| 3. | 3 | 2 | 4 | 1 |
| 4. | 4 | 2 | 1 | 3 |
Subtopic: Structural Isomers | Stereo Isomers | Conformational Isomers |
95%
Level 1: 80%+
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Given below are two statements:
Statement-1 : There is 2 sp3,1 sp2 and 1 sp hybridised carbon present in -
Statement-2 :
have two chiral centres
1. Statement-1 is incorrect but Statement-2 is correct
2. Statement-1 is correct but Statement-2 is incorrect
3. Both statements are correct.
4. Both statements are incorrect
Statement-1 : There is 2 sp3,1 sp2 and 1 sp hybridised carbon present in -
Statement-2 :
have two chiral centres1. Statement-1 is incorrect but Statement-2 is correct
2. Statement-1 is correct but Statement-2 is incorrect
3. Both statements are correct.
4. Both statements are incorrect
Subtopic: Hybridisation & Structure of Carbon Compounds |
Level 4: Below 35%
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1 gm of unknown organic compound produces 1.49 g of \(Mg_2P_2O_7\), determine % of P in the unknown organic compound:
1. 11.61
2. 21.61
3. 31.61
4. 41.61
1. 11.61
2. 21.61
3. 31.61
4. 41.61
Subtopic: Quantitative Analysis of Organic Compounds |
Level 4: Below 35%
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An organic compound contains ‘C’, ‘H’ and ‘O’. 0.25 gm of organic compound on combustion produces \(CO_2(g)\) and \(H_2O(l)\). When residual gases passes through potash solution, it’s mass increases by 0.18 g and when passed through anhydrous CaCl2 , the increase in mass of CaCl2 is 0.15 g. Find the mass % of oxygen in the organic compound:
1. 71
2. 73
3. 75
4. 77
1. 71
2. 73
3. 75
4. 77
Subtopic: Quantitative Analysis of Organic Compounds |
72%
Level 2: 60%+
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Hints
What is the correct order of stability for the given carbanions?
1. a > b > c > d > e
2. b > e > d > a > c
3. a > c > d > e > b
4. b > e > d > c > a
| (a) |  |
| (b) |  |
| (c) |  |
| (d) |  |
| (e) |  |
1. a > b > c > d > e
2. b > e > d > a > c
3. a > c > d > e > b
4. b > e > d > c > a
Subtopic: Electron Displacement Effects | Reaction Intermediates ; Preparation & Properties |
85%
Level 1: 80%+
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0.5 g of an organic compound is analysed by Dumas method for nitrogen estimation. The volume of nitrogen gas collected over water at 715 mm pressure and 27°C is 70 mL. Aqueous tension at 27°C is 15 mm. Calculate the percentage of nitrogen in the compound:
1. 12.35
2. 13.10
3. 14.65
4. 15.75
1. 12.35
2. 13.10
3. 14.65
4. 15.75
Subtopic: Quantitative Analysis of Organic Compounds |
65%
Level 2: 60%+
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What is the correct IUPAC name of the given compound?
1. 2-Bromo-5-Ethylhexanoate
2. Propyl-2-Bromo-5-Methylheptanoate
3. Propyl-2-Bromo-5-Ethylhexanoate
4. 2-Bromo-5-Methylpropylheptanoate
1. 2-Bromo-5-Ethylhexanoate
2. Propyl-2-Bromo-5-Methylheptanoate
3. Propyl-2-Bromo-5-Ethylhexanoate
4. 2-Bromo-5-Methylpropylheptanoate
Subtopic: Nomenclature |
82%
Level 1: 80%+
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