621 Any process of chemical decay of metals due to the action of surrounding medium is called__________________? Chemistry Medium Full question → A activation B enameling C corrosion D coating
622 In the production of wrought iron Mg Si and P are removed in the form of___________________? Chemistry Medium Full question → A oxides B silicates C slag D carbonates
623 When the central atom of coordination compound is sp3d2 hybridization the expected geometry will be___________________? Chemistry Medium Full question → A tetrahedral B square planar C trigonal bipyramidal D octahedral
624 In complex compounds the oxidation number is written in___________________? Chemistry Medium Full question → A English B Greek C Roman numeral D Hebrew
625 The central atom along with ligands is called____________________? Chemistry Medium Full question → A complex ion B coordination sphere C ligand D complex compound
626 The species which donate two electron pairs in a coordination compound is called__________________? Chemistry Medium Full question → A ligand B mono-dentate ligand C poly-dentate ligand D bi-dentate ligand
627 When a compound of transition element is dissolved in a solution of salt then it produces____________________? Chemistry Medium Full question → A simples ions B complex ions C double salts D strong anions
628 When light is exposed to transition element then electrons jump from lower orbitals to higher orbitals in______________________? Chemistry Medium Full question → A orbitals of f-subshell B orbitals of d-subshell C orbitals of p-subshell D both A & B
629 Compounds attracted by applied strong magnetic field are called__________________? Chemistry Medium Full question → A diamagnetic B paramagnetic C good conductor D ferromagnetic
630 The location of transition elements is in between__________________? Chemistry Medium Full question → A lanthanides & actinides B s and p block elements C chalcogens and halogens D d and f block elements
631 K2 (Cu(CN)4) which one is correct___________________? Chemistry Medium Full question → A Potassium tetra cyano cupperate B Co-ordination number is 2 C Ligand is positively charged D Central atom is present in avionic sphere
632 Which of the following is typical transition metal ? Chemistry Medium Full question → A Sc B Y C Cd D Co
633 When an active metal like Al comes in contact with less active element like Cu then it produces__________________? Chemistry Medium Full question → A dry cell B galvanic cell C electrolytic cell D A and B
634 Which is sold as fertilizer ___________________? Chemistry Medium Full question → A CaSiO3 B Na2SiO3 C Ca3(PO4)2 D MnSiO3
635 Rate of reaction when concentration of reactants are taken as unity is called_________________? Chemistry Medium Full question → A Arrhenius constant B Molecularity C Specific rate constant D Ideal rate constant
636 When a graph is plotted between 1/T on X-axis and log k on y-axis a straight line is obtained with a negative slope which has two end in__________________? Chemistry Medium Full question → A I and II quadrant B II and III quadrant C III and IV quadrant D II and IV quadrant
637 In rate expression the concentration of reactants is negative. It shows_______________? Chemistry Medium Full question → A Concentration of reactant does not change B Concentration of product increases C Concentration of reactant decreases D Concentration of reactant increases
638 Sum of exponents of molar concentration is called___________________? Chemistry Medium Full question → A Order of reaction B Molecularity C Rate of reaction D Average of reaction
639 On increasing the temperature the rate of reaction increases mainly because_________________? Chemistry Medium Full question → A The activation energy of the reaction increases B Concentration of the reacting molecules increases C Collision frequency increases D None of these
640 The addition of a catalyst to the reaction system__________________? Chemistry Medium Full question → A Increases the rate of forward reaction only B Increases the rate of reverse reaction C Increases the rate of forward but decreases the rate of backward reaction D Increases the rate of forward as well as backward reaction equally