The given plots represent the variation of the concentration of a reactant R with time for two different reactions (i) and (ii). The respective orders of the reactions are

• 0, 1

• 0, 2

• 1, 0

• 1, 1

572.

A bacterial infection in an initial wound grows N₀(t) = N₀ exp(t), here the time t is in hours A dose of antibiotic, taken orally , needs 1 hour to reach the wound. Once it reaches there , the bacterial Population goes down as $\frac{\mathrm{dN}}{\mathrm{dt}}= -5{\mathrm{NH}}^2$ . what will be plot of $\frac{{\mathrm{N}}_0}{\mathrm{N}}\mathrm{Vs} \mathrm{t} \mathrm{after} 1 \mathrm{hour}$

 

• 

• 

• 

• 

For the reaction of H₂ with I₂, the rate constant is 2.5 × 10^-4 dm³ mol^-1s^-1 at 327°C and 1.0 dm³ mol^-1s^-1 at 527°C. The activation energy for the reaction, in kJ mol^-1 is: (R= 8.314 Jk^-1mol^-1)

• 166

• 150

• 59

• 72

The rate of a first-order reaction is 0.04 mol L^-1s^-1 at 10 sec and 0.03 mol^-1L^-1 s^-1 at 20 sec after initiation of the reaction. the half-life period of the reaction is 

• 34.1 s

• 44.1 s

• 54.1 s

• 54.1 s

The ionic radii of A⁺ and B^- ions are 0.98 x 10^-10 m and 1.81 x10^-10 m. The coordination number of each ions in AB is 

• 4

• 8

• 2

• 2

The activation energy of a reaction can be determined from the slope of which of the following graphs? 

• InK vs T

• 
• 
• 

When initial concentration of a reactant is doubled in a reaction, its half-life period os not affected the order of the reaction is?

• Zero

• first

• second

• second

What is the activation energy for a reaction if its rate doubles when the temperature is raised from 20⁰C to 35⁰C ?(R=8.314 J mol^-1 K^-1).

• 342 kJ mol^-1

• 269 kJ mol^-1

• 34.7 kJ mol^-1

• 34.7 kJ mol^-1

In a reaction, A+B → Product, rate is doubled when the concentration of B is doubled, and rate increases by a factor of 8 when the concentrations of both the reactants (A and B) are doubled. Rate law for the reaction can be written as

• Rate = k[A][B]²

• Rate = k[A]²[B]²

• Rate = k[A][B]

• Rate k[A]²[B]

In Freundlich adsorption isotherm, the value of 1/n is

• between 0 and 1 in all cases

• between 2 and 4 in all cases

• 1 in case of physical adsorption

• 1 in case of chemisorption