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

1.	Urea	2.	Hydrazine
3.	Azobenzene	4.	Phenyl hydrazine

The pair that represents chain isomers is:

Fischer projection indicates:

1. Horizontal substituents above the plane.

2. Vertical substituents above the plane.

3. Both horizontal and vertical substituents below the plane.

4. Both horizontal and vertical substituents above the plane.

Find the correct statement for an SN1 reaction at a chiral centre.

1. 100% racemization

2. Inversion is more than retention, leading to partial racemization. 

3. 100% retention

4. 100% inversion

The general molecular formula, that represents the homologous serious of alkanols is:
1. \(C_{n} H_{2 n} O_{2}\)
2. \(C_{n} H_{2 n} O\)
3. \(C_{n} H_{2 n + 1} O\)
4. \(C_{n} H_{2 n + 2} O\)

$\stackrel{\stackrel{\mathrm{H}}{|}}{\mathrm{C}}{\mathrm{H}}_2-\stackrel{\stackrel{\mathrm{Cl}}{|}}{\mathrm{C}}{\mathrm{H}}_2\underset{\mathrm{alc}.}{\overset{\mathrm{NaOH}}{\to }}{\mathrm{CH}}_2={\mathrm{CH}}_2$

1. E1                                         

2. E2

3. $E{1}_{CB}$                                     

4. $\alpha$ elimination

The IUPAC name of the above mentioned compound is - 

1. 3,3-Diethyl-4-methyl-5-(methylethyl)octane

2. 3,3-Diethyl-5-isopropyl-4-methyloctane

3. 4-Isopropyl-5-methyl-6,6-diethyloctane

4. 6,6-Diethyl-4-isopropyl-5-methyloctane

The number of isomeric structures for C₂H₇N would be:
1. Four (4)
2. Three (3)
3. Two  (2) 
4. One (1)

The decreasing order of the stability of the given ions is:

(I).		(II).
(III).

The maximum number of stereoisomers possible for 3-hydroxy-2-methyl butanoic acid is/are :

1. 1               

2. 2

3. 3               

4. 4