481 By decreasing the pressure the reaction will go to that direction where_________________? Chemistry Medium Full question → A volume is decreased B volume increased C heat absorbed D no. of moles of specie decreased
482 Solubility of any salt can be determined from_______________? Chemistry Medium Full question → A Ka B Kb C Kc D Ksp
483 Addition of CH3COOH and CH3COONa gives in water_______________? Chemistry Medium Full question → A Standard solution B buffer solution C acidic buffer solution D both B & C
484 When sparingly soluble salt is in equilibrium with molar concentration of its oppositely charged ion when the product is called_________________? Chemistry Medium Full question → A common ion effect B solubility product C dissociation constant D dissociation constant for an acid
485 Any substance which accepts H+ is base favours the concept___________________? Chemistry Medium Full question → A Lowrys B Lewis C Arrhenius D None of these
486 Negative log of mular concentration of H+ ions is called___________________? Chemistry Medium Full question → A pH B pOH C pKa D pKw
487 By the addition of base in waterpH will be_______________? Chemistry Medium Full question → A more than 7 B less than 7 C equal to 7 D no effect
488 Catalyst used to speed up the reaction of ammonia synthesis is________________________? Chemistry Medium Full question → A V2O5 B V2O5 and Pt C Fe D Pieces of Fe crystals are embedded in fused mixture of MgO Al2O3 and SiO2
489 Rate expression for ammonia synthesis is___________________? Chemistry Medium Full question → A Kc=x2/(a-x)(b-x) B Kc=x2/v(a-x) C Kc=4×2/(a-2x)2(b-x) D Kc=4x2v2/(a-x)(b-3x)3
490 Unit of Kc is_______________? Chemistry Medium Full question → A moles2dm+6 B moles-2dm+6 C moles+2dm-6 D Kc may or may not have units
491 Zn(s)/Zn+2(aq) 1M | | Cu+2(aq) 1M/Cu(s) is representation of reaction in______________? Chemistry Medium Full question → A Daniel cell B Downs cell C Voltaic cell D Nelsons cell
492 For the measurement of standard electrode potential Zn is dipped in________________? Chemistry Medium Full question → A 1 M ZnO solution B 1 M ZnSO4 solution C 1.5 M ZnSO4 solution D 0.1 M ZnSO4 solution
493 In Galvanic cell electrons flow from anode to cathode through__________________? Chemistry Medium Full question → A external electric circuit B salt bridge C movement of ions D all of the above
494 In electrolytic cell electricity carries________________? Chemistry Medium Full question → A spontaneous reaction B non-wpontaneous reaction C neutralization D all of above
495 Electricity in voltaic cell is produced due to_________________? Chemistry Medium Full question → A neutralization B oxidation C reduction D both B & C
496 Molten NaCl conducts electricity due to the presence of_______________? Chemistry Medium Full question → A Free electrons B Free molecules C Free ions D Atoms of Na and Cl
497 In a galvanic cell________________? Chemistry Medium Full question → A Chemical energy is converted into electricity B Chemical energy is converted into heat C Electrical energy is converted into chemical energy D Electrical energy is converted into heat
498 In an electrolytic cell current flows ? Chemistry Medium Full question → A From cathode to anode in outer circuit B From anode to cathode outside the cell C From cathode to anode inside the cell D both B & C
500 If electricity is passed through CuSO4 solution by using Pt electrode then which of the following possible change occurs ? Chemistry Medium Full question → A H2 is deposited at cathode B Colour of the solution becomes fade C Cu is deposited at anode D All are possible