A) 24,8 31. \( 49 \% 300 \mathrm{~g} \) sulfat kislota eritmasida 120 g. sulfat angdrid eritilishidan hosil bo lgan eritmadagi kislotaning foiz konsentratsiyasin aniqlang. \( \begin{array}{ll}\text { A) } 58,8 & \text { B) } 38\end{array} \)

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

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

[3-520] The \( \mathrm{p}^{\mathrm{H}} \) value of a certain solution may vary by all the following, except..... a) adding acid or base to the solution. b) adding an extra amount from the same solution. c) evaporating a part of water (solvent) by heating without changing the amount of solute.

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