What is the change in the oxidation state of Mn in the reaction of MnO${}_4^{-}$ with H₂O₄ in acidic medium?

• 7 ➔4

• 6➔4

• 7➔2

• 6➔2

32.

In Haber's process, 50.0 g of N₂(g) and 10.0 g of H₂(g) are mixed to produce NH₃ (g). What is the number of moles of NH₃ (g) formed?

• 3.33

• 2.36

• 2.01

• 5.36

The following reaction occurs in acidic medium KMnO₄ + 8H⁺ + 5e^- → K⁺ + Mn²⁺ + 4H₂O. What is the equivalent weight of KMnO₄ ?

(Molecular weight of KMnO₄ = 158)

• 79.0

• 31.6

• 158.0

• 39.5

Which is the strongest base among the following?

• H₃CNH₂

• 

• 

• 

Consider the following reactions,

X + Y $\stackrel{{\mathrm{H}}^{+}}{\to }$ Aspirin + H₃CCOOH. Identify X and Y from the following

$\mathrm{R}-\mathrm{CN} \underset{\left(\mathrm{ii}\right) {\mathrm{H}}_3{\mathrm{O}}^{+}}{\overset{\left(\mathrm{i}\right) {\mathrm{SnCl}}_2+ \mathrm{HCl}}{\to }} \mathrm{R}-\mathrm{CHO}$. What is the name of the above reaction?

• Rosenmund

• Williamson

• Stephen

• Kolbe

Chloroxylenol is an example of........

• antiseptic

• antipyretic

• analgesic

• tranquiliser

Hormone that maintains the blood glucose level within the limit is

• thyroxine

• Insulin

• testosterone

• epinephrine

The poly dispersity index (PDI) of a polymer is ($\stackrel{-}{\mathrm{M}}$_w = weight average molecular mass and $\stackrel{-}{\mathrm{M}}$_n = number average molecular mass)

• the product $\stackrel{-}{{\mathrm{M}}_{\mathrm{n}}} \mathrm{and} \stackrel{-}{{\mathrm{M}}_{\mathrm{w}}}$

• the sum of $\stackrel{-}{{\mathrm{M}}_{\mathrm{n}}} \mathrm{and} \stackrel{-}{{\mathrm{M}}_{\mathrm{w}}}$

• the difference between $\stackrel{-}{{\mathrm{M}}_{\mathrm{w}}} \mathrm{and} \stackrel{-}{{\mathrm{M}}_{\mathrm{n}}}$

• the ratio between $\stackrel{-}{{\mathrm{M}}_{\mathrm{w}}} \mathrm{and} \stackrel{-}{{\mathrm{M}}_{\mathrm{n}}}$