MCQ of chapter 4 chemical kinetics chemistry for class 12, objective questions of chemical kinetics, objective questions of class 12 chemistry chapter 4, best and easy way

MCQ of chapter 4 chemical kinetics chemistry

First of all, by clicking on the link given below, give a mock test {MCQ of chapter 4 chemical kinetics chemistry for class 12}, so that you can get to know how much you have studied. After that you read the objective questions given below

1. In any reaction, catalyst:
(किसी भी प्रतिक्रिया में, उत्प्रेरक होता है:)
Retards the rate of reaction
Increase the rate of reaction
Both
None of these

2. If the rate of a reaction is expressed by, Rate = k[A]2[B], the order of reaction will be:
(यदि किसी प्रतिक्रिया की दर को R = k[A]2[B] द्वारा व्यक्त किया जाता है, तो प्रतिक्रिया का क्रम होगा:)
2
3
1
0

3. The maximum amount of energy required to convert reactant molecules into products is:
(अभिकारक अणुओं को उत्पादों में बदलने के लिए आवश्यक ऊर्जा की अधिकतम मात्रा है:)
Kinetic energy
Potential energy
Activation energy
Kinetic + potential energy

4. The rate constant of a reaction depends upon:
(किसी अभिक्रिया का वेग स्थिरांक निर्भर करता है:)
Temperature of the reaction
Extent of the reaction
Initial concentration of the reactants
The time of completion of reaction

5. The unit of rate and rate constant are same for a:
(दर और दर स्थिरांक की इकाई एक के लिए समान है:)
Zero order reaction
First order reaction
Second order reaction
Third order reaction

6. For a reaction if activation energies for forward and backward reactions are the same, then:
(एक प्रतिक्रिया के लिए यदि आगे और पीछे की प्रतिक्रियाओं के लिए सक्रियण ऊर्जा समान हैं, तो:)
△H = 0
△S = 0
The order is zero
None of these

7. A first order reaction takes 40 min for 30% decomposition. what will be t1⁄2?
(प्रथम कोटि की अभिक्रिया में 30% अपघटन में 40 मिनट का समय लगता है। t1⁄2 क्या होगा?)
77.7 min
52.5 min
46.2 min
22.7 min

8. Radioactive disintegration is an example of:
(रेडियोधर्मी विघटन इसका एक उदाहरण है:)
Zero order reaction
First order reaction
Second order reaction
Third order reaction

MCQ of chapter 4 chemical kinetics chemistry

9. A plot of log (a-x) against time t is a straight line. This indicates that the reaction is of:
(समय t के सामने लघुगणक (a-x) का प्लॉट एक सीधी रेखा है। यह इंगित करता है कि प्रतिक्रिया है:)
Zero order
First order
Second order
Third order

10. Rate of which reaction increases with temperature?
(तापमान के साथ किस प्रतिक्रिया की दर बढ़ जाती है?)
Exothermic reaction
Endothermic reaction
Both
None of these

11. When a catalyst is used in an equilibrium process:
(जब एक उत्प्रेरक का उपयोग संतुलन प्रक्रिया में किया जाता है)
It increases the rate of forward reaction
It decreases the rate of backwards reaction
It decreases activation energy of forward process and decreases activation energy of backward process
It fastens the attainment of equilibrium by lowering activation energy

12. The role of catalyst is to change……………
(उत्प्रेरक की भूमिका बदलने की है…………)
Gibbs energy of reaction
Enthalpy of reaction
Activation energy of reaction
Equilibrium constant

13. In the presence of a catalyst, the heat evolved or absorbed during the reaction……………
(उत्प्रेरक की उपस्थिति में अभिक्रिया के दौरान उष्मा विकसित या अवशोषित होती है।)
Increases
Decreases
May increase or decrease
Remains unchanged

14. Half life period of first order reaction is independent of:
(प्रथम कोटि की अभिक्रिया का आधा जीवन काल स्वतंत्र होता है 🙂
Initial concentration of reactant
Temperature
Pressure
None of these

MCQ of chapter 4 chemical kinetics chemistry