Q. No.The IUPAC name of the compound
is-
1. 3-Keto-2-methylhex-4-enal
2. 5-Formylhex-2-en-3-one
3. 5-Methyl-4-oxohex-2-en-5-al
4. 3-Keto-2-methylhex-5-enal
is-
The correct order of acidity among the following is:
1. CH2=CH2 >CH≡CH > CH3C≡CH > CH3-CH3
2. CH≡CH > CH3-C≡CH > CH2=CH2 >CH3-CH3
3. CH≡CH > CH2=CH2 > CH3-C≡CH > CH3-CH3
4. CH3-CH3 > CH2=CH2 > CH3-C≡CH > CH≡CH
The most suitable method of separation of 1:1 mixture of ortho and para-nitrophenols is
1. sublimation
2. chromatography
3. crystallisation
4. steam distillation
Which among the given molecules can exhibit tautomerisrn?
1. III Only
2. Both I and III
3. Both Iand II
4. Both II and III
The correct order of strengths of the carboxylic acids :-
(a) I>II>III
(b) II>III>I
(c) III>II>I
(d) lI>I>IlI
The correct statement regarding the comparison of staggered and eclipsed conformations of ethane is:
| 1. | The eclipsed conformation of ethane is more stable than staggered conformation because eclipsed conformation has no torsional strain |
| 2. | The eclipsed conformation of ethane is more stable than staggered conformation even though the eclipsed conformation has a torsional strain |
| 3. | The staggered conformation of ethane is more stable than the eclipsed conformation because staggered conformation has no torsional strain |
| 4. | The staggered conformation of ethane is less stable than eclipsed conformation because staggered conformation has torsional strain |
In Duma’s method for estimation of nitrogen, 0.25g of an organic compound gave 40 mL
of nitrogen collected at 300 K temperature and 725 mm pressure. If the aqueous tension
at 300 K is 25 mm, the percentage of nitrogen in the compound is
1. 17.36
2. 18.20..
3. 16.76
4. 15.76
The compound that gives the most stable carbonium ion after C- Cl bond ionisation among the following is-
| 1. |  |
2. |  |
| 3. |  |
4. |  |
consider the following compounds
hyperconjugation occurs in
1. I only
2. II only
3. III only
4. I and III
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