N2O
NO
NO2
NaNO3
NH3
Correct answer is C
No explanation has been provided for this answer.
Cu(OH)2
CuSo4.5H2O
(NH4)2SO4
Cu(NH3)4(OH)2
CuSO4.(NH4)2SO4.2H2O
Correct answer is D
\(CuSO_4+2NH_4OH→(NH_4)_2SO_4+Cu(OH)_2\)(pale−blue)
The pale blue precipitate of copper hydroxide dissolves in excess of ammonium hydroxide forming tetraamine copper [II] sulphate, an azure blue(deep blue) soluble complex salt.
\(Cu(OH)_2+(NH_4)_2SO_4+2NH_4OH→[Cu(NH_3)_4]SO_4+4H_2O\)
silver nitrates solution, a white precipates insoluble in dilute HNO3
barium chloride solution, a white precipitate insoluble in dilute H2SO4
barium chloride solution, a white precipitate soluble in dilute HCl
barium chloride solution a white precipitate soluble in dilute ammonia
barium chloride solution a white precipitate insoluble in dilute HCl
Correct answer is E
Sulfate ions in solution are detected using barium chloride solution.
The test solution is acidified using a few drops of dilute hydrochloric acid, and then a few drops of barium chloride solution are added.
A white precipitate of barium sulfate forms if sulfate ions are present.
chlorine
aluminium
silicon
magnesium
sodium
Correct answer is B
No explanation has been provided for this answer.
Which of the following represents a precipitation reaction?
H2SO4 + NaCl \(\to\) NaHSO4 + HCl
Fe +H2SO4 \(\to\) FeSO4 + H2
4HCl + MnO2 \(\to\) MnCl2 + 2H2O + Cl2
Na2SO4 + pb(NO3) \(\to\) PbSO4 + 2NaNO
CuO +2HCl \(\to\) Cl2 + H2O
Correct answer is D
No explanation has been provided for this answer.