Test Index

ICSE Class 10 Chemistry 2023 Paper

Show Para  Hide Para 
SECTION - I
Choose the correct answers to the questions from the given options.
© examsnet.com
Question : 6 of 88
Marks: +1, -0
The metallic hydroxide which forms a deep inky blue solution with excess ammonium hydroxide solution is :
Solution:  
(b) Ca(OH)2\mathrm{Ca}(\mathrm{OH})_2
Explanation:
CuSO4+2NH4OH→(NH4)2SO4\mathrm{CuSO}_4 + 2\mathrm{NH}_4\mathrm{OH} \rightarrow (\mathrm{NH}_4)_2\mathrm{SO}_4 +Cu(OH)2+ \mathrm{Cu}(\mathrm{OH})_2
Cu(OH)2+(NH4)2SO4+NH4OH→[Cu(NH3)4]SO4\mathrm{Cu}(\mathrm{OH})_2 + (\mathrm{NH}_4)_2\mathrm{SO}_4 + \mathrm{NH}_4\mathrm{OH} \rightarrow [\mathrm{Cu}(\mathrm{NH}_3)_4]\mathrm{SO}_4 +4H2O+ 4\mathrm{H}_2\mathrm{O}
© examsnet.com
Go to Question:
Prev Question
Next Question