461 Acid present in acid rain may be__________________? Chemistry Medium Full question → A H2SO4 B HNO3 C both A and B D none
462 Hypochlorous acid is used for disinfecting the water it reacts with the dissolved ammonia producing___________________? Chemistry Medium Full question → A NH2Cl B NHCI2 C NCI2 D all of the above
463 Residence time of methane in the atmosphere is___________________? Chemistry Medium Full question → A 3 – 7 days B 2 -3 days C 3 – 7 years D 2 – 3 years
464 Three elements needed for the healthy growth of plants are_________________? Chemistry Medium Full question → A N P K B N K C C N S P D N Ca P
465 Which of the following is a macro nutrient ? Chemistry Medium Full question → A boron B iron C copper D carbon
466 Ka Chemistry Medium Full question → A Very strong base B Very weak acid C Very strong acid D Very strong salt
467 Idea of pH and pOH was put forward by________________? Chemistry Medium Full question → A Gibbs B Einstein C Sorenson D Chadwick
468 When the value of Kc is very small then_______________________? Chemistry Medium Full question → A reaction is at start B product conc. Is maximum C reactant conc. Is minimum D reaction is completed
469 In case of gases Kc is replaced by_______________? Chemistry Medium Full question → A Ka B Kb C Kp D K
470 At start of reaction the concentration of reactants is_______________? Chemistry Medium Full question → A high B low C according to Kc D constant
471 Chemical equilibrium state is_______________? Chemistry Medium Full question → A dynamic state B static state C free state D unidirectional state
472 Which set of solutes will form a buffer when dissolved in water to make 1 litter of solution ? Chemistry Medium Full question → 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 NaOH D 0.4 mole of NH3 with 0.2 mole of HCI
473 Which of following is not a base______________? Chemistry Medium Full question → A KOH B NH3 C PH3 D BF3
474 In which of the following equilibria will Kc and Kp have the same value ? Chemistry Medium Full question → A PCI5 = PCI3 + Cl2 B N2 + 3H2 = 2NH C 2CO + O2 = CO2 D N2 + O2 = 2NO
475 Sodium benzoate and benzoic acid are mixed in equimolar ration to form buffer if pKa is 2 what will be the pH ? Chemistry Medium Full question → A 0 B 1 C 2 D any one
476 Kc value has_______________? Chemistry Medium Full question → A No units B Units C Both A & B D None
477 Conjugated base of a weak acid is_________________? Chemistry Medium Full question → A weak B strong C moderately weak D unstable
478 Solution having the property of a very little change in pH on adding a small amount of strong acid or base is called________________? Chemistry Medium Full question → A buffer solution B normal solution C standard solution D neutral solution
479 Which one of the following is a buffer solution ? Chemistry Medium Full question → A brine B blood C glue D solution of CuSO4
480 Equilibrium state is achieved quickly by the addition of ________________? Chemistry Medium Full question → A reactants B acid C base D catalyst