[3-441] Hydrocyanic acid is one of the weak acids which is incompletely ionized, and its ionization is according to the following equation: \[ \mathrm{HCN}_{(\mathrm{aq})}+\mathrm{H}_{2} \mathrm{O}_{(\mathrm{l})} \rightleftharpoons \mathrm{H}_{3} \mathrm{O}^{+}(\mathrm{aq})+\mathrm{CN}^{-}(\mathrm{aq}) \] On adding drops of \( \mathrm{H}_{2} \mathrm{SO}_{4} \) solution: the concentration of \( \mathrm{CN}^{-} \)will ..... and on adding drops of KOH solution: the concentration of \( \mathrm{CN}^{-} \)will ......

Q1/ The half-life for a first-order reaction is 5 min . What was the origina concentration if, after 300 sec , the reactant concentration is 0.069 M ?

[3-311] The formation rate of nitrogen is \( 0.01 \mathrm{M} / \mathrm{sec} \) so the consumption rate of ammonia is \( \mathrm{M} / \mathrm{sec} \) \( 4 \mathrm{NH}_{3(g)}+30_{2(g)} \rightleftharpoons 2 \mathrm{~N}_{2(g)}+6 \mathrm{H}_{2} \mathrm{O}_{(v)} \) a) 0.01 b) 0.02 c) 0.005 d) 0.001

1 ગ્રામ મોલ \( \mathrm{N}^{3-} \) આયન પરનો વીજભાર \( =\ldots \ldots \). કુંલબ \( \begin{array}{ll}\text { (a) } 2.89 \times 10^{5} & \text { (b) } 1.36 \times 10^{7} \\ \text { (c) } 3.36 \times 10^{2} & \text { (d) } 1.89 \times 10^{4}\end{array} \)

Q2/ If the activation energy of the reaction \( \mathrm{A} \rightarrow \mathrm{B} \) at \( 25.0^{\circ} \mathrm{C} \) is \( 3.00 \mathrm{~kJ} / \mathrm{mble} \) and the first order rate constant for that reaction is \( 0.500 \mathrm{~s}^{-1} \) at that temperature, what will the rate constant for the reaction be at \( 35.0^{\circ} \mathrm{C} \) ?

ग्लास घुलनशील है - (A) HF में (B) \( \mathrm{H}_{2} \mathrm{SO}_{4} \) में (C) \( \mathrm{HClO}_{4} \) में (D) अम्लराज में