Which of the following amino acid has the lowest iso-electric point?

1. Glycine

2. Alanine

3. Aspartic acid

4. Lysine

Find iso-electric point of given amino acid

        $C{H}_3—CH—C{O}_{2}H$
$|$
$\underset{\oplus }{N}{H}_3$pK_a = 2.2              pK_b = 4.4

(1) 3.3

(2) 5.9

(3) 9.6

(4) 11.8

Find an iso-electric point of the given amino acid

1. 5.5

2. 6.5

3. 3

4. 5

$\mathrm{H}-\mathrm{C}\equiv \mathrm{C}-\mathrm{H} \underset{{\mathrm{H}}_2{\mathrm{SO}}_4}{\overset{{\mathrm{HgSO}}_4}{\to }}\left(A\right) \underset{\left(2\right){\mathrm{H}}_3{\mathrm{O}}^{\oplus }}{\overset{\left(1\right){\mathrm{NH}}_3+\mathrm{HCN}}{\to }}\left(B\right)$ Product (B) of given reaction is:

(1) Glycine

(2) Alanine

(3) valine

(4) Leucine

Which amino acid does not contain a chiral center?

1. Valine

2. Leucine

3. Glycine

4. Iso-leucine

Which of the following pair gives same phenyl osazone ?

(1) D-Glucose and D-Allose

(2) D-Glucose and D-Alfrose

(3) D-Glucose and D-Mannose

(4) D-Glucose and D-Talose

Among the three compounds shown below, two yield the same product on reaction with warm HNO₃. The exception is:-

(1)

(2)

(3)

(4) None of these

For the complex conversion of D-glucose into the corresponding osazone, the minimum number of equivalents of phenyl hydrazine required is :

(1) two

(2) three

(3) four

(4) five

Which one of the following compounds will form an osazone derivative ?

1. CH₃CH₂COCH₂OH

2. CH₃COCH₂CH₂OH

3. CH₃CH₂CHOHCH₂OH

4. CH₃CH₂COCH₂OCH₃

The configuration of the chirality centers in D-threose (shown) are:

(1) 2R, 3R

(2) 2R, 3S

(3) 2S, 3R

(4) 2S, 3S