Chemical Equilibrium

Ka<10-3 means______________? A. Very strong baseB. Very weak acid C. Very strong acid D. Very strong salt

Idea of pH and pOH was put forward by________________? A. Gibbs B. EinsteinC. Sorenson D. Chadwick

When the value of Kc is very small then_______________________? A. reaction is at startB. product conc. Is maximum C. reactant conc. Is minimum D. reaction is completed

In case of gases Kc is replaced by_______________? A. Ka B. KbC. Kp D. K

At start of reaction the concentration of reactants is_______________? A. high B. low C. according to Kc D. constant

Chemical equilibrium state is_______________? A. dynamic state B. static state C. free state D. unidirectional state

Which set of solutes will form a buffer when dissolved in water to make 1 litter of solution ? A. 0.0002M HCI B. 0.2 mole of NaCI with 0.2 mole of HNO3 C. 0.4 mole of CH3COOH with 0.4 mole of NaOHD. 0.4 mole of NH3 with 0.2 mole of HCI

Which of following is not a base______________? A. KOH B. NH3 C. PH3D. BF3

In which of the following equilibria will Kc and Kp have the same value ? A. PCI5 = PCI3 + Cl2 B. N2 + 3H2 = 2NH C. 2CO + O2 = CO2D. N2 + O2 = 2NO

Sodium benzoate and benzoic acid are mixed in equimolar ration to form buffer if pKa is 2 what will be the pH ? A. 0 B. 1C. 2 D. any one