Quiz Medium 5 Categories Quizzes 0 Quiz Medium 5 1 / 25 Hydrogen gas will not reduce Heated ferric oxide Heated aluminum oxide Heated cupric oxide Heated stannic oxide 2 / 25 The pKa of an acid having ionization constant 1 x 10 -5 is -9 5 9 10 -5 3 / 25 Which of the following statement is correct regarding copper? Its salts are used as insecticides All are correct It is used for making scientific apparatus Its salts are used as coloring materials It is used in electroplating 4 / 25 In bisulphate ion, the formal charge on sulphur atom is 4 1 2 6 5 / 25 Acetone can be converted into pinacol by Na/Hg Zn/Hg Mg/Hg All of these 6 / 25 The base which is not present in DNA is Adenine Uracil Guanine Thymine 7 / 25 α-Amino acetic acid with HNO2 forms Oxalic Acid Nitroacetic acid Acetic acid Glycolic Acid 8 / 25 . In isoquinoline the nucleophilic substitution occurs, readily at 3-position 1-position 4-position 5-position 9 / 25 Which of the following statements is false about enantiomers? Are superimposable mirror images Non-superimposable mirror images Have the same melting points Rotate plane of polarized light All above 10 / 25 The hybridization of nitrogen atom in pyridine is sp sp2 sp3 It is not hybridized 11 / 25 Heterolysis of a C-C covalent bond forms? Carbanions only Carbocations only Free radicals Both (B) and © 12 / 25 Biological role of nucleic acid does not include Genetic continuity Mutation Protein Synthesis Hybridisation 13 / 25 A pH of a neutral solution at 100°C when Kw = 1.0 x 10-12 is 12 2 6 7 14 / 25 Which of the following device measure the surface tension? Viscometer Refractometer Photometer Stalagnometer Polarimeter 15 / 25 The reaction of benzene ring are mainly Free Radical substitution Nucleophilic addition Nucleophilic substitution Electrophonic substitution 16 / 25 Carbylamine reaction proceeds via the intermediate formation of Dichloro Methylene Alkyl Carbanion Chloride ion Alkyl isocyanide 17 / 25 Which metal burns in air at high temperature with the evolution of much heat ? Hg Al Cu Pb 18 / 25 Diels-Alder reaction is an example of which type of reaction Pericyclic reaction Nucleophilic addition Sigmatropic reaction Electrophilic addition 19 / 25 If n an d are the refractive index and density of a liquid and M molar mass, then molar refraction is defined as RM = [ (n2 - 1) / (n2 + 2) ] * (d / M) RM = [ (n3 - 1) / (n2 + 2) ] * (d / M) RM = [ (n2 + 2) / (n2 - 1) ] * ( M/ d) RM = [ (n - 1) / (n2 + 2) ] * (M / d) RM = [ (n2 - 1) / (n2 + 2) ] * (M / d) 20 / 25 Which of the following method is based on the solubility difference between the analyte and the unwanted components? Complex formation Distillation Electrodeposition None of the above Precipitation 21 / 25 The key element to be considered when evaluating a health hazard is The amount of material the employee is exposed The total time of exposure All above Individual susceptibility The toxicity of the substance 22 / 25 Reaction of sodium ethoxide with malonic ester forms a Resonance stabilised free radical Resonance stabilised electrophile Resonance stabilized anion Resonance stabilized cation 23 / 25 Ferrochrome contains Cr up to 80-90% 70 -80% 60-70% 40-50% 24 / 25 Petrol can he saved by Driving at a constant & moderate speed None of these Switching off the engine at traffic lights Ensuring correct type pressure All of these 25 / 25 Among alkali metals, the least metallic element is Na Cs Li Rb 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
