451.

Which of the following is the strongest base?

• C₆H₅NH₂

• CH₃NH₂

• NH₃

• CH₃CONH₂

The degree of ionization of 0.4 M acetic acid will be (K_a = 1.8 × 10)

• 6.71 × 10^-3

• 1.6 × 10^-3

• 0.4 × 1.8 × 10^-3

• 1.8 × 10^-5

The product of molar concentrations of hydrogen ions and hydroxide ions in a 0.01 M aqueous solution of sodium chloride is known as

• hydrolysis constant of salt

• dissociation constant of acid

• dissociation constant of base

• ionic product of water

A solution contains Cl^-, I^- and SO${}_4^{3-}$ ions in it. Which of the following ion is capable to precipitate all of the above when added in this solution?

• Pb²⁺

• Ba²⁺

• Hg²⁺

• Cu²⁺

What is the pH of millimolar solution of ammonium hydroxide which is 20% dissociated?

• 3.699

• 10.301

• 4.691

• 9.301

Which of the following compounds is most acidic in nature?

• 4-chlorobutanoic acid

• 3-chlorobutanoic acid

• 2-chlorobutanoic acid

• Butanoic acid

Solubility of which among the following solids in water changes slightly with temperature?

• KNO₃

• NaNO₃

• KBr

• NaBr

Which among the following equation represents Arrhenius equation?

• $\mathrm{k} = {{\mathrm{A}}_{\mathrm{e}}}^{{\mathrm{E}}_{\mathrm{a}}/ \mathrm{RT}}$

• k = A . ${\mathrm{e}}^{\mathrm{RT}/ {\mathrm{E}}_{\mathrm{a}}}$

• $\mathrm{k} = \frac{\mathrm{A}}{{\mathrm{e}}^{{\mathrm{E}}_{\mathrm{a}}/ \mathrm{RT}}}$

• k = $\frac{\mathrm{A}}{{\mathrm{e}}^{\mathrm{RT}/ {\mathrm{E}}_{\mathrm{a}}}}$

In the ln K vs $\frac{1}{\mathrm{T}}$ plot of a chemical process having $∆$S° > 0 and $∆$H° < 0, the slope is proportional to (where K is equilibrium constant).

• -|$∆$H°|

• |$∆$H°|

• $∆$S°

• -$∆$S°

For the process,

$\frac{3}{2}$A → B, at 298 K, $∆$G° is 163 kJ mol^-1. The composition of the reaction mixture is [B] = 1 and [A] = 10000. Predict the direction of the reaction and the relation between reaction quotient (Q) and the equilibrium constant (K).

• Forwards direction because Q > K

• Reverse direction because Q > K

• Forward direction because Q < K

• Reverse direction because Q < K