ABC26IN0667 · On addition of a solution of AgNO3 to a solution of Na2 S2 O3, it turns black on standing due to the formation of: · 2005-2022
ABC26IN0668 · 2(a) Addition of potassium oxalate solution to a hot solution of potassium dichromate containing dilute sulfuric acid leads to… · 2005-2022
ABC26IN0669 · 4(a) A solution of metal ion (M2+ ) when treated with H2 S gas gives a black precipitate A . Precipitate A dissolved in hot concentrated… · 2005-2022
ABC26IN0671 · 6(a) Consider the reaction (I) Cr2 O72-+H2 O2 A Unstable CrO (O2 )2 room temperature Cr3+ (II) Cr3++H2 O2 B Cr2 O72- (i) Identify A and B… · 2005-2022
ABC26IN0672 · 7(a) Identify A, B and C in the following reaction scheme · 2005-2022self-practice
ABC26IN0673 · 8(a) Highly pure nickel metal can be prepared from its sulphide ore via Ni(CO)4. Write the chemical equations involved. · 2005-2022self-practice
ABC26IN0674 · A metal salt on heating with a mixture of KCl and conc. H2 SO4 yields a deep red vapour J. The vapour on passing through an aqueous… · 2005-2022self-practice
ABC26IN0675 · The most probable oxidation states for both Cr and Mo are · 2005-2022
ABC26IN0676 · The pair of amphoteric oxides is: · 2005-2022
ABC26IN0677 · The transition metal monoxide that shows metallic conductivity is: · 2005-2022
ABC26IN0678 · The metal that is extracted by the reduction method is: · 2005-2022
ABC26IN0679 · Addition of an aqueous solution of Fe(II) to potassium hexacyanochromate (III) produces a brick-red colured complex, which turns dark green… · 2005-2022
ABC26IN0680 · In the following equilibrium and reactions, identify species B to E. Write the balanced chemical equation for the conversion of C to E. · 2005-2022self-practice
ABC26IN0682 · The compound formed by dissolving elemental gold in aqua regia is: · 2005-2022
ABC26IN0683 · Number of moles of ions produced by complete dissociation of one mole of Mohr's salt in water is · 2005-2022
ABC26IN0684 · A filter paper moistioned with ammonical sodium nitroprusside solution turns violet on contact with a drop of alkaline Na2 S solution. The… · 2005-2022
ABC26IN0685 · Among the following, the ligand that BEST stabilizes low oxidation state of tungsten (W) is · 2005-2022
ABC26IN0686 · The reaction of anhydrous FeCl2 with sodium-pentadienyl in ether gives an air-stable diamagnetic orange solid, which on oxidation gives an… · 2005-2022self-practice
ABC26IN0687 · The amount (in grams) of potassium dichromate (MW=294) present in 75 mL of 0.16 M aqueous solution is ____ · 2005-2022
ABC26IN0688 · In the following Latimer diagram, the species the undergoes disproportionation reaction is MnO4- +0.56 MnO42- 0.93 MnO2 +0.15 Mn2 O3 -0.25… · 2005-2022self-practice
ABC26IN0689 · A yellow precipitate is formed upon addition of aqueous AgNO3 to a solution of · 2005-2022
ABC26IN0690 · The metal ion (M2+ ) in the following reaction is M2++S2- Black precipitate hot conc. HNO3 White precipitate · 2005-2022self-practice
ABC26IN0691 · Which of the following metal(s) is(are) extracted from its(their) sulfide ore(s) by self-reduction air reduction method? · 2005-2022self-practice
ABC26IN0692 · In a saturated calomel electrode, the saturation is with respect to · 2005-2022self-practice
ABC26IN0693 · In qualitative inorganic analysis of metal ions, the ion which precipitates as sulfide in the presence of H2 S in warm dilute HCl is · 2005-2022
ABC26IN0694 · The true statement(s) regarding the brown ring test carried out in the laboratory for the detection of NO3- is/are · 2005-2022self-practice
ABC26IN0695 · Titanium tetrachloride (TiCl4 ) reacts with THF to form an octahedral complex X under inert atmosphere at 25°C. If 5.0 g of TiCl4 is used… · 2005-2022self-practice