Participation of _______________ is involved in the occurrence of a chemical reaction?

In a first order reaction, the time required to reduce the concentration of reactant from 1 mole/litre to 0.5 mole/litre will be ______________ that required to reduce it from 10 moles/litre to 5 moles/litre in the same volume ?

A. More than

B. Less than

C. Same as

D. Data insufficient; can’t be predicted

The first order series reaction as shown in the bellow figure is conducted in a batch reactor. The initial concentrations of A, B and C (CA0, CB0, CC0 respectively) are all non-zero. The variation of CB with reaction time will not show a maximum, if___________________?

A. k2 CB0 > k1 CA0

B. k CA0 > k2.CB0

C. CB0 > CA0

D. CA0 > CB0

A photochemical reaction is _______________ light?

A. Initiated by

B. Accompanied with emission of

C. Catalysed by

D. Used to convert heat energy into

The value of ‘n’ for a chemical reaction A → B, whose reaction rate is → CA n, will be _______________ if the rate of the reaction increases by a factor of 8, when the concentration of is doubled?

A. 0

B. 1

C. 2

D. 3

________________ resistance is not involved in the combustion of a carbon particle?

A. Gas film

B. Ash

C. Chemical reaction

D. None of these