Collision Theory

Q. A neutron makes a head on elastic collision with a stationary deutron. the fractional energy loss of the neutron in collision is 16/81 8/9 8/27 2/3

Q. For a reaction $A+B\leftrightarrows C+D$, if the activation energy of backward reaction is more than that of forward reaction, the forward reaction is :

1. endothermic
2. exothermic
3. reaction need not necessarily involve heat changes
4. cannot predicted

Q.

In most cases, for a rise of 10K temperature, the rate constant is doubled or tripled. This is due to the reason that ?

1. Activation energy is lowered by a factor of 2 to 3

2. None of these

3. Collision frequency increases by a factor 2 to 3

4. Fraction of molecules possessing threshold energy increases by a factor of 2 to 3

Q. An exothermic reaction A $\to$ B has an activation energy of 17 kJ per mole of A. The heat of reaction is 40 KJ. The activation energy for the reverse reaction B $\to$ A is

1. 23 kJ
2. 97 kJ
3. 57 kJ
4. 17 kJ