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Quiz 195
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3881. Half-life of a first order reaction is:
1/ka
0.693/ka
0.693/k
0.693a/k
3882. When nitric oxide reacts with ozone, the order of reaction will be:
Zero
2ND
1st
3rd
3883. According to collision theory of bimolecular reaction in gas phase, the minimum amount of energy required for an effective collision is known as:
Heat of reaction
Rate of reaction
Has no effect on reaction
Energy of activation
3884. If the energy of activation of a chemical reaction is very low, the rate of that chemical reaction is observed to be very high because:
Reaction proceeds without any transition state
Number of efficient or fruitful collisions increases
Concentration of the reactants becomes irrelevant
Molecules of the reactants move slowly
3885. What is the measure of activation energy in an endothermic reaction?
Activation energy of forward is less than that of backward reaction
Activation energy of forward and backward reaction is same
Activation energy of backward reaction is less than that of forward reaction
Activation energy of backward reaction is more than that of forward reaction
3886. Which of the following is correct Arrhenius Equation?
K = Ae^(-Ea)
K = Ae^RT
K = Ae^(-Ea/RT)
K = Ae^UT
3887. What is incorrect about activated complex?
It is a high energy specie
It is a stable specie
It is an unstable specie
Potential energy is maximum at activated complex stage
3888. Activated complex consists of:
Maximum energy
Minimum energy
Is a stable state
Large half-life
3889. 'e' in Arrhenius equation is:
Activation energy
Temperature
Arrhenius constant
Base of natural logarithm
3890. When colliding molecules come close to each other, they --- to go to transition complex:
Collide fast
Slow down
Does not depend upon energy
Increase their kinetic energy
3891. For exothermic reaction:
Products are at higher energy state than reactants
Products and reactants are at same energy level
Products are at lower energy state than reactants
Products have higher entropy than reactants
3892. The energy of activation for forward and backward reactions are:
Same for all
Different for all
For some same/different
Zero
3893. Unit of activation energy is:
J•K⁻¹
J•K⁻¹•mol⁻¹
J/mol
K
3894. The effect of temperature on the rate of a reaction is given by:
Henderson's equation
General gas equation
Arrhenius equation
Van der Waal's equation
3895. When temperature of reacting gases is raised by 10 K, the rate will increase to:
Double
Four times
Three times
Five times
3896. The minimum amount of energy required by the colliding particles for effective collisions is called:
Activation energy
Lattice energy
Bond energy
Hydration energy
3897. The catalysis in which the catalyst and the reactants are in the same phase is known as:
Heterogeneous catalyst
Homogeneous catalyst
Slow
Fast
3898. Which remains same along a period?
Atomic radius
Melting point
Numbers of shells
Electrical conductivity
3899. More the ionization energy of an element?
More electro positivity
More the reducing power
Less the metallic character
Bigger the atomic radius
3900. Along a period, atomic radius decreases. This gradual decrease in radius is due to:
Increase in number of electrons in valence shell
Increase in number of protons in nucleus
Decrease in number of shells
Increase in number of shells
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