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

 

 

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

In pyrrole,

The electron density is maximum on

1. 2 and 3         2. 3 and 4

3. 2 and 4         4. 2 and 5

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:

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