520 gram asetilen elde edebilmek için kütlece \( \% 40 \) saflıkta- ki karpit \( \left(\mathrm{CaC}_{2}\right) \) in en az kaç gramı suyla tepkimeye girme- lidir? \( (\mathrm{H}=1, \mathrm{C}=12, \mathrm{O}=16) \)

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 \( 35.0^{\circ} \mathrm{C} \) ?

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 ?

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.

[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 ......