Which reaction is NOT a redox reaction?
Option 4: BaCl2 + Na2SO4 → BaSO4 + 2NaCl
Explanation:
A redox reaction involves a change in oxidation states of the reacting species. Let's analyze each option:
Option 1: Zn + CuSO4 → ZnSO4 + Cu
Zn (0) → Zn2+ (oxidation)
Cu2+ → Cu (0) (reduction)
This is a redox reaction.
Option 2: 2KClO3 + I2 → 2KIO3 + Cl2
Cl+5 → Cl2 (0) (reduction)
I2 (0) → I+5 (oxidation)
This is a redox reaction.
Option 3: H2 + Cl2 → 2HCl
H2 (0) → H+1 (oxidation)
Cl2 (0) → Cl-1 (reduction)
This is a redox reaction.
Option 4: BaCl2 + Na2SO4 → BaSO4 + 2NaCl
This is a double displacement reaction. The oxidation states of all the elements remain unchanged:
Ba2+, Cl-, Na+, SO42- remain the same on both sides of the equation.
Therefore, this is not a redox reaction.
List I | List II | ||
A | Down’s syndrome | I | 11th chormosome |
B | α-Thalassemia | II | ‘X’ chromosome |
C | β-Thalassemia | III | 21st chromosome |
D | Klinefelter’s syndrome | IV | 16th chromosome |
The velocity (v) - time (t) plot of the motion of a body is shown below :
The acceleration (a) - time(t) graph that best suits this motion is :