NEET2019ChemistryChemical KineticsActual
For the chemical reaction N 2 g + 3 H 2 g ⇋ 2 N H 3 g , the correct option is:
Options
- A- 1 3 d [ H 2 ] d t = - 1 2 d [ N H 3 ] d t
- B- d [ N 2 ] d t = 2 d [ N H 3 ] d t
- C- d [ N 2 ] d t = 1 2 d [ N H 3 ] d t
- D3 d [ H 2 ] d t = 2 d [ N H 3 ] d t
Correct answer
C. - d [ N 2 ] d t = 1 2 d [ N H 3 ] d t
Step-by-step solution
For the reaction N 2 g + 3 H 2 g ⇌ 2 N H 3 g , Rate= Change   in   concentration   of   reactants   or   products time   taken   for   change Rate = - d N 2 d t = - 1 3 d H 2 d t = 1 2 d N H 3 d t ∴ - d N 2 d t = 1 2 d N H 3 d t A negative sign before a reaction rate symbol signifies a decrease in concentration of reactant with increase of time.