Quiz Hard 2 Categories Quizzes 0 Quiz Hard 2 1 / 30 The number of unpaired electrons Fe2+ 2 3 4 5 2 / 30 Which of the following range to usually used for liquid samples in packed column GC' 0.1-10 m l 20-50 m l 10-20 m l 50-100 m l 3 / 30 Which of the following elements does not impart any characteristic colour to the flame? Ca Ba Mg Sr 4 / 30 Of the molecules, SF4 XeF4 and CF4, which have square planar geometry? SF4 only XeF4 only CF4 only SF4, XeF4 and CF4 5 / 30 is used for fruits, vegetables and tobacco Potassium chloride Potassium iodide Potassium Nitrate Potassium sulphate None of these 6 / 30 Which of the following hydroxides is lean soluble in water? Ba(OH)2 Ca(OH)2 Mg(OH)2 Sr(OH)2 7 / 30 Which of the following techniques does not belong to column chromatography? Electrophoresis TLC HPLC Size exclusion Ion-exchange 8 / 30 which of the following cast iron is a high carbon , iron- carbon-silicon alloy? Deoxifiers Deoxidizers Deterrent Deorizers 9 / 30 In biological ecosystem, which of the following substance is used by organism.? all these sunlight minerals water and minerals Water 10 / 30 Suppose the activation energy of a certain reaction is 250 kJ/mol. If the rate constant at 300 K is Ici and the rate constant at 320 K is ki, then the reaction is times faster at 320 K than at 300 K. 3*10-29 3*10-28 15 0.067 525 11 / 30 Electronagitivity of oxygen is 3.5 2.1 2.4 2.5 12 / 30 Thermal stability of hydrides of group 16 .elements decreases in the following order H2S > H2Se > 1120 > H2Te > H2Po H2S > H2Se > H2Te > H20 > H2Po H20 > H2S > H2Se > H2Te > H2Po H2Po > H2Te > H2Se >H2S . H20 13 / 30 pH value of water at 25 degree celcius kw=1* 10-4 7 none 14 14 / 30 Buffer solutions are used to decrease the pH Resist thr pH none increase pH 15 / 30 What is considered as the general purpose oldest type and widely used cast iron? Malleable iron Alloy iron Black iron Gray iron Ductile iron 16 / 30 Beryllium salts on hydrolysis give Neutral solutions Amphoteric solutions Acidic solutions Basic solution 17 / 30 The exchange equilibrium in gas chromatography depends on Chemical interactions between stationary phase and analyte The polarity of the stationary phase and analyte Solubility or adsorbability of the sample The degree of H-bonding all these 18 / 30 Given: A + 3B -----2C + D This reaction is first order with respect to reactant A and second order with respect to reactant B. If the concentration of A is doubled and the concentration of B is halved, the rate of the reaction would by a factor of not change Increase, 2 Decrease 4 Decrease. 2 Increase, 4 19 / 30 Which of the following has the highest melting point? NaCl LiCl KCl RbCl 20 / 30 Which one of the following pairs are chemically dissimilar? Ca and Zn Ba and Sr Na and K Zr and Hf 21 / 30 Beryllium shows diagonal relationship with B Na Al Mg 22 / 30 In the presence of dilute alkali monosaccharides undergo rversible isomerisation.The reaction lnown as Mutarotation Lobry de Bruyn van Ekenstein rearrangement Weermann rearrangement Kiliani reaction 23 / 30 Ainmonia when used directly as fertilizer is to be injected about under the surface to keep it from seeping out. 10 inches 4 inches 6 inches 2 inches 8 inches 24 / 30 Which of the following is domain of industrial ecology? The materials processor all these the consumer The materials extractor the water processor 25 / 30 which one of the following compounds acidic? H2Se H2Te H2S H2O 26 / 30 Which of the following carbonates decomposes at the highest temperature? SrCO3 BaCO3 MgCO3 CaCO3 27 / 30 Which of the following statement is not related with industrial ecology? Study of interactions between 'human activities and its environment industrial ecology seeks to optimize the total industrial materials cycle from virgin material to finished product Industrial impacts on the environment Economic systems are viewed not in isolation from their surroundings Economic systems arc 'viewed in isolation from their surroundings 28 / 30 SO2 act as Lewic acid both a and b Lewis base none 29 / 30 Gold dissolve in aqua regia forming? Au(NO3)3 AuCl3 HAuCl4 AuCl 30 / 30 The cooling of molten area by air in the tower is called Crystallization Distillation Evaporation Frilling Condensation Your score is Share: Quiz Dad Previous post Quiz Hard 1 October 1, 2022 Next post Quiz Hard 3 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
