Related Questions

The half life period of a radioactive substance is best determined by counting the number of alpha particles emitted per second in a Geiger Muller counter from its known quantity. If the half life period of a radioactive substance is one month, then
A $${\frac{3}{4}^{{\text{th}}}}$$ of it will disintegrate in two months
B It will completely disintegrate in two months
C It will completely disintegrate in four months
D $${\frac{l}{8}^{{\text{th}}}}$$ of it will remain intact at the end of four months
An endothermic aqueous phase first order irreversible reaction is carried out in an adiabatic plug flow reactor. The rate of reaction
A Is maximum at the inlet of the reactor
B Goes through a maximum along the length of the reactor
C Goes through a minimum along the length of the reactor
D Is maximum at the exit of the reactor
A first order irreversible reaction, A → B is carried out separately in a constant volume as well as in a variable volume reactor for a particular period. It signifies that __________ in the two reactors.
A Both conversion as well as concentration are same
B Conversion in both will be the same but concentrations will be different
C Both the conversion as well as concentrations will be different
D None of these
A man sells chocolates which are in the boxes. Only either full box or half a box of chocolates can be purchased from him. A customer comes and buys half the number of boxes which the seller had plus half box more. A second customer comes and purchases half the remaining number of boxes plus half a box. After this the seller is left with no chocolate boxes. How many chocolate boxes the seller had initially?
A 2
B 3
C 4
D 3.5
E None of these
The irreversible reaction is a special case of reversible reaction, if the
A Equilibrium constant is 1
B Conversion of the reactant at equilibrium condition is zero
C Reactant concentration at equilibrium condition is zero
D All of the above
The irreversible reaction, X → Y, is the special case of the reversible reaction, X ⇋ Y, in which the
A Equilibrium constant is infinite
B Fractional conversion of
C Concentration of
D All of the above
An irreversible first order reaction is being carried out in a CSTR and PFR of same volume. The liquid flow rates are same. The relative conversion will
A Be more in CSTR than in PFR
B Be more in PFR than in CSTR
C Be same in both cases
D Depend on the temperature
In case of the irreversible unimolecular type, first order reaction, the fractional conversion at any time for constant volume system as compared to variable volume system is
A More
B Less
C Same
D Either A or B, depends on other factors
The conversion of a reactant, undergoing a first order reaction, at a time equal to three times the half life of the reaction is
A 0.875
B 0.5
C 0.425
D Data insufficient to calculate
The half life period of a first order reaction is given by (where, K = rate constant. )
A 1.5 K
B 2.5 K
C $$\frac{{0.693}}{{\text{K}}}$$
D 6.93 K

Next steps