41.

The major product of the following reaction is:

• 

• 

• 

• 

The compound that is most difficult to protonate is :

For the chemical reaction:

N₂(g) + 3H₂(g) $\rightleftharpoons$ 2NH₃(g)

The correct option is:

• $-\frac{\mathrm{d}\left[{\mathrm{N}}_2\right]}{\mathrm{dt}}= 2\frac{\mathrm{d}\left[{\mathrm{NH}}_3\right]}{\mathrm{dt}}$

• $-\frac{\mathrm{d}\left[{\mathrm{N}}_2\right]}{\mathrm{dt}}= \frac{1}{2}\frac{\mathrm{d}\left[{\mathrm{NH}}_3\right]}{\mathrm{dt}}$

• $3\frac{\mathrm{d}\left[{\mathrm{H}}_2\right]}{\mathrm{dt}}= 2\frac{\mathrm{d}\left[{\mathrm{NH}}_3\right]}{\mathrm{dt}}$

• $-\frac{1}{3}\frac{\mathrm{d}\left[{\mathrm{H}}_2\right]}{\mathrm{dt}}= -\frac{1}{2}\frac{\mathrm{d}\left[{\mathrm{NH}}_3\right]}{\mathrm{dt}}$

The correct order of the basic strength of methyl substituted amines in aqueous solution is :

• (CH₃)₃N > CH₃NH₂ > (CH₃)₂NH

• (CH₃)₃N > (CH₃)₂NH> CH₃NH₂

• CH₃NH₂ > (CH₃)₂NH >(CH₃)₃N 

• (CH₃)₂NH> CH₃NH₂ > (CH₃)₃N

Among the following, the narrow spectrum antibiotic is :

• Ampicillin

• Amoxycillin

• Chloramphenicol

• Penicillin G