Quiz Medium 5 Categories Quizzes 0 Quiz Medium 5 1 / 25 The sum of pH and pOH in aqueous solution is equal to pKw 7 Zero 14 2 / 25 In the reaction HCN + H2O ↔ H3O+ CN- the conjugate acid-base pair is HCN, H3O+ CN- , H3O + H2O, CN- HCN , CN- 3 / 25 Boric acid is added to glass, because it Makes the glass opalescent Makes the glass brittle Increase refractive index of the glass Reduces the coefficient of expansions 4 / 25 Which element among the following cannot exhibit variable electrovalency ? 30 Sn 38 Sr 29 Cu 25 Mn 5 / 25 The current-voltage characteristics forms the basis of Potentiometry Thermal analysis Colorimetry Polarography Condtuctometry 6 / 25 One arm of each t-RNA terminates in the base sequence GGC UGU CCA ACT 7 / 25 The correct order of ionization energies of alkali metals is Li>Na>K>Rb Rb>K>Li>Na Rb>K>Na>Li Na>K>Rb>Li 8 / 25 Which of the following is the third most abundant element in the nature? Sulphur Oxygen Aluminium Hydrogen 9 / 25 Different arrangements of groups in space which can be converted into one another by rotation around a single bond are called Conformations Enantiomers Configuration Metamers All above 10 / 25 If 20 ml of 0.5 N salt solution in diluted to one litre, what is the new concentration? 10 N 0.01 N 5 N 0.00 1N 1 N 11 / 25 Which of the following physical property forms the basis of radio chemical methods of analysis? Radioactivity Emission of light Thermal conductivity Absorption of light Scattering of light 12 / 25 Compounds HCN and HNC are Metamers None of the above Conformers Functional isomers Tautomers 13 / 25 Various compounds corresponding to molecular formula C4 H10 are None of the above Tautomers Functional Isomers Chain isomers Position isomers 14 / 25 The most abundant alkali metal is Sodium Rubidium Potassium Lithium 15 / 25 Which name is associated with the rules which help in predicting the polarisability of anion? Slater Soddy Fajan Linus Pauling 16 / 25 If n and no are the coefficients of viscosity of a solution and the pure solvent, then specific viscosity may be expressed as n/no (no - n) / no (1+n) / (1 - n0) None of the above (n - no) / no 17 / 25 . Entropy is a measure of Randomness Heat Content Enthalpy Free energy 18 / 25 Which of the following compound is electrovalent in nature? SO2 ICI CHI3 KBr 19 / 25 Which of the following analytical technique is used for the separation of an interfering substance or analyte from the mixture? Precipitation Electrode position Solvent extract Distillation All above these 20 / 25 The alkali metal that reacts with nitrogen directly to form nitride is K Na Rb Li 21 / 25 It is possible to distinguish between optical Isomers? By mass spectrometry By conductometry By IR spectroscopy By polarimetry Using chemical tests 22 / 25 HS- is a conjugate base of H2S H2SO3 S2- H2SO4 23 / 25 The Hall process involves the reduction of Al203 to aluminum by Molecular hydrogen Electrolysis Carbon (coke) Carbon monoxide 24 / 25 Layer of C-atom in graphite are held together by Free electrons Covalent bonds Double Bonds Ionic Bonds Van der Waal's Forces 25 / 25 Which of the following technique is used to separate substances of high molecular weights (proteins, enzymes) of different charges? Distillation None of the above Solvent Electrophoresis Dialysis Your score is Share: Quiz Dad Previous post Quiz Medium 4 October 1, 2022 Next post Quiz Hard 1 October 1, 2022 You may also like Quiz Hard 5 1 October, 2022 Quiz Hard 4 1 October, 2022 Quiz Hard 3 1 October, 2022