Which of the following carbocation will undergo rearrangement ?

1.  

2.

$3. {\mathrm{CH}}_3-\underset{ |}{\mathrm{C}}$
${\mathrm{CH}}_3\mathrm{H}-\stackrel{\oplus }{\mathrm{C}}=\mathrm{O}$

$4. {\mathrm{CH}}_3-\mathrm{NH}-\stackrel{\oplus }{\mathrm{C}}\mathrm{H}-\underset{|}{\mathrm{C}}$
${\mathrm{CH}}_2\mathrm{H}-{\mathrm{CH}}_3$

The colour of the solution that gets formed by mixing sodium nitroprusside to an alkaline solution of sulfide ions, is-

In Kjeldahl's method, the nitrogen present is estimated as-

1. N₂ 

2. NH₃

3. NO₂ 

4 None of the above

The Prussian blue colour obtained during the test of nitrogen by Lassaigne's test is due to the formation of-

A compound that does not give a positive test in Lassaigne’s test for nitrogen is:

1. Urea

2. Hydrazine

3. Azobenzene

4. Phenylhydrazine

The IUPAC name of the compound is:

1. 2-Methyl-6-oxohex-3-enamide

2. 6-Keto-2-methyl hexanamide

3. 2-Carbamoylhexanal

4. 2-Carbamoylex-3-enal

The correct IUPAC name of the given compound is:



1. Methyl 2-ethylbutanoate

2. 1-Methoxy-2-ethylbutanone

3. 3-Methoxycarbonylpentane

4. 1-methoxy-2-ethylbutanal

The IUPAC name of CH₃-CH=CH-COOH is-

1. But-1-en-4-oic acid

2. 1-Hydroxybut-2-en-1-one

3. But-2-en-1-oic acid

4. But-2-en-4-oic acid

The IUPAC name of the below given compound is: 
 

1. Ethyl 2-methylprop-2-enoate

2. Ethyl 2-methylprop-1-enoate

3. 1-Ethoxy 2-methylprop-2-enoate

4. 1-Ethoxy 2-methylprop-2-enal

The IUPAC name of the following compound is:
$$

1. 2,3-Dimethylbutan-4-amine

2. 2,4-Dimethylbutan-1-amine

3. 2,4-Dimethylbutan-4-amine

4. 2,3-Dimethylbutan-1-amine