Consider the following reaction,
The values of x,y and z in the reaction are respectively
5,2 and 16
2,5 and 8
2,5 and 16
2,5 and 16
Which of the following chemical reactions depicts the oxidizing behaviour of H2SO4?
2HI+ H2SO4 →I2 +SO2+2HO
Ca(OH)2 +H2SO4 → CaSO4 +2H2O
NaCl +H2SO4 → NaHSO4 + HCl
NaCl +H2SO4 → NaHSO4 + HCl
Hydrogen peroxide oxidises in acidic medium but reduces in alkaline medium. The other products formed are, respectively
H2O and (H2O + OH-)
(H2O + O2) and H2O
(H2O + O2) and (H2O + OH-)
H2O and (H2O + O2)
Nitric acid can be obtained from ammonia via the formations of the intermediate compounds
nitric oxide and nitrogen dioxide
nitrogen and nitric oxide
nitric oxide and dinitrogen pentoxide
nitrogen and nitrous oxide
What are the species (A) and (B) in the following
CrO3 + H2O → (A) (B)
H2CrO4, H2Cr2O7
H2Cr2O7, Cr2O3
CrO, Cr2O
H2CrO4, CrO
In the reaction,
2FeCl3 + H2S → 2FeCl2 + 2HCl + S
The correct statement is
FeCl3 acts as an oxidising agent
H2S and FeCl3 both act as an oxidising agent
FeCl3 get oxidised while H2S get reduced
H2S acts as an oxidising agent
A.
FeCl3 acts as an oxidising agent
In the given reaction, Fe3+ changes to Fe2+ and S2- changes to S (zero). Thus, Fe3+ acts as an oxidising agent and itself reduce to Fe2+.
When copper is treated with a certain concentration of nitric acid, nitric oxide and nitrogen dioxide are liberated in equal volumes according to the equation,
xCu + yHNO3 → Cu(NO3)2 + NO + NO2 + H2O
The coefficients of x and y are respectively
2 and 3
2 and 6
1 and 3
3 and 8
The standard reduction potentials at 298 K for the following half reactions are given against each:
The strongest reducing agents is:
Zn(s)
Cr(s)
H2 (g)
Fe2+ (aq)