The unit of rate constant for zero order reaction is
- ${{s}^{-1}} $
- $ mol\,{{L}^{-1}}{{s}^{-1}}$
- $ L\,mo{{l}^{-1}}{{s}^{-1}}$
- ${{L}^{2}}\,mo{{l}^{-2}}{{s}^{-1}} $
The Correct Option is B
Solution and Explanation
or $k=\frac{dx}{dt}=\frac{\operatorname{co}nc.}{time} $
$=\frac{mol{{L}^{-1}}}{s}=mol{{L}^{-1}}{{s}^{-1}} $
Top Questions on Rate of a Chemical Reaction
- In a reaction, \( 3A \rightarrow \text{Products} \), the concentration of \( A \) decreases from 0.6 mol L\(^{-1}\) to 0.3 mol L\(^{-1}\) in 20 minutes. What is the rate of the reaction during this interval?
- KEAM - 2025
- Chemistry
- Rate of a Chemical Reaction
- Which among the following is a false statement?
- CBSE CLASS XII - 2025
- Chemistry
- Rate of a Chemical Reaction
Observe the following reactions:
\( AB(g) + 25 H_2O(l) \rightarrow AB(H_2S{O_4}) \quad \Delta H = x \, {kJ/mol}^{-1} \)
\( AB(g) + 50 H_2O(l) \rightarrow AB(H_2SO_4) \quad \Delta H = y \, {kJ/mol}^{-1} \)
The enthalpy of dilution, \( \Delta H_{dil} \) in kJ/mol\(^{-1}\), is:- AP EAMCET - 2024
- Chemistry
- Rate of a Chemical Reaction
- An isomer of C₆H₁₂ on reaction with Br₂/ light gave only one isomer C₆H₁₁Br (X). Reaction of X with AgNO₃ gave Y as the major product. What is Y?
- AP EAMCET - 2024
- Chemistry
- Rate of a Chemical Reaction
Identify the sets of species having the same bond order:
(i) \( {F}_2, {O}_2^{2-} \)
(ii) CO, NO\(^{+}\)
(iii) \(N_2\), \(O_2\)
(iv) \(H_2\), \(B_2\)
The correct option is:- AP EAMCET - 2024
- Chemistry
- Rate of a Chemical Reaction
Questions Asked in NEET exam
In an oscillating spring mass system, a spring is connected to a box filled with sand. As the box oscillates, sand leaks slowly out of the box vertically so that the average frequency ω(t) and average amplitude A(t) of the system change with time t. Which one of the following options schematically depicts these changes correctly?
- NEET (UG) - 2025
- Oscillations
A full wave rectifier circuit with diodes (\(D_1\)) and (\(D_2\)) is shown in the figure. If input supply voltage \(V_{in} = 220 \sin(100 \pi t)\) volt, then at \(t = 15\) msec:
- NEET (UG) - 2025
- Semiconductor Diode
- The intensity of transmitted light when a polaroid sheet, placed between two crossed polaroids at \(22.5^\circ\) from the polarization axis of one of the polaroids (\(I_0\) is the intensity of polarised light after passing through the first polaroid):
- NEET (UG) - 2025
- Polarization
Which are correct?
A. Computed tomography and magnetic resonance imaging detect cancers of internal organs.
B. Chemotherapeutic drugs are used to kill non-cancerous cells.
C. \( \alpha \)-interferon activates the cancer patients' immune system and helps in destroying the tumour.
D. Chemotherapeutic drugs are biological response modifiers.
E. In the case of leukemia, blood cell counts are decreased.
Choose the correct answer from the options given below:The output (Y) of the given logic implementation is similar to the output of an/a …………. gate.
- NEET (UG) - 2025
- Logic gates
Concepts Used:
Rate of a Chemical Reaction
The rate of a chemical reaction is defined as the change in concentration of any one of the reactants or products per unit time.
Consider the reaction A → B,
Rate of the reaction is given by,
Rate = −d[A]/ dt=+d[B]/ dt
Where, [A] → concentration of reactant A
[B] → concentration of product B
(-) A negative sign indicates a decrease in the concentration of A with time.
(+) A positive sign indicates an increase in the concentration of B with time.
Factors Determining the Rate of a Reaction:
There are certain factors that determine the rate of a reaction:
- Temperature
- Catalyst
- Reactant Concentration
- Chemical nature of Reactant
- Reactant Subdivision rate