A colourless organic compound gave brisk effervescence with a mixture of ${\mathrm{NaNO}}_2$ and dil. HCl. It could be:

(1) glucose 

(2) oxalic acid

(3) urea 

(4)benzoic acid

Aliphatic amines are ......basic than ${\mathrm{NH}}_3$ but aromatic amines are .....basic than ${\mathrm{NH}}_3$

(1) more, less

(2) less, more

(3) both (a) and (b) 

(4) none of these

Aliphatic amines are soluble in water because:

(1) they are basic.

(2) they are amino compounds.

(3) they are lighter than water.

(4) of formation of hydrogen bonds with water.

Amines have:

1. garlic odour

2. fishy odour

3. jasmine odour

4. bitter almonds odour

 and R-O-N=O are  ----- isomers

1. Chain

2. Functional

3. Position

4. All of the above

Primary nitroalkanes on hydrolysis give:

(1) RCOOH+NH₂OH

(2) RCOOH

(3) NH₂OH

(4) RCOR

Aqueous solution of urea is:

1. Acidic

2. Alkaline

3. Almost neutral

4. Amphoteric

Nitroparaffins on reduction give:

1. Amide

2. Alkylamine

3. Ammonium salt

4. Acetanilide

Which of the following enzymes can hydrolyse urea into CO₂ and NH₃: 

1. Amylase

2. Urease

3. Lipase

4. Zymase

Which of the following amines is optically active?

(1) ${\mathrm{CH}}_3{\mathrm{NH}}_2$

(2) ${\mathrm{CH}}_3{\mathrm{NHCH}}_3$

(3) ${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_2-\stackrel{\stackrel{{\mathrm{CH}}_3}{|}}{\mathrm{N}}-{\mathrm{C}}_2{\mathrm{H}}_5$

(4) Sec. butylamine