Відео

Option C - PbCl2 ✓ Lead(II) chloride dissolves in hot water but insoluble in cold water. [✨ HThanks for your participation in the Quiz. 👍 Congrats! 👏 🎉 for your correct response!]

Option B - Na[Ag(CN)2] sodium argentocyanide(aq) ✓ For smooth & uniform coating of silver over the article, sodium argentocyanide(aq) is preferred to silver nitrate(aq). Because silver nitrate dissociates faster in its aqueous solution and so the deposition of silver will be faster and not uniform. [ ✨ Thanks for your participation in the Quiz. 👍 Congrats! 🎉 🎉 👏 for your correct response! ]

Option D - redox reaction ✓ The oxidation number of Zn increases from 0 to +2 (oxidation) and the oxidation number of Cu decreases from +2 to 0 (reduction). [Thanks for your participation in the Quiz. 👍 Congratulations to the participants who have given the correct answer. 🎉 👏 ]

Option C - Zn(OH)2 ✓ With excess of caustic soda solution - NaOH - zinc hydroxide gives sodium zincate Na2ZnO2 which is a colourless solution. With excess of NH4OH(aq), zinc hydroxide forms tetrammine zinc(II) sulphate which is a colourless solution. [Thanks for your participation in the Quiz. 👍 Congratulations to the participants who have given the correct answer. 🎉 👏 ]

Option D - V2O5 ✓

Option A - Pb(OH)2 ✓

Option C - C2H5OH ✓

Option D - Ca(OH)2 ✓

Option B - Reddish brown ppt ✓

Option A - SO4 2- ✓

Option B - -1/2 ✓

Option A - Combination ✓

Option B - Decomposition ✓

Option C - PbO ✓

Option B - C2H4 ✓

Option D - C6H14 ✓

Option D - Cs ✓

Option D - Cs ✓

Option C - CH3COOH ✓

Option D - Bauxite ✓

Option C - Alkyne ✓

Option B - Copper hydroxide ✓

Option D

Option C