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**Q1. **Give relation between half reaction time (t_(1/2))and initial concentration of reactant for (n-1)order reaction.
Solution

Relation between (t_(1/2))and initial concentration of reactant for (n-1)order reaction
t_(1/2)∝[R]_0^(2-n)

**Q2.**For the reaction
N_2+3H_2⇌2NH_3
The rate of change of concentration for hydrogen is 0.3×〖10〗^(-4) Ms^(-1)
The rates of change of concentration of ammonia is
Solution

**Q3. **For the reaction system
2NO(g)+O_2 (g)→2NO_2 (g) if the volume of the reaction vessel is reduced to one-third of its original volume, what will be the order of the reaction?
Solution

**Q4. **The rate constant of nth order has units:
Solution

For nth order; unit of rate constant may be derived by
K=rate/[reactant]^n

**Q5.**In the reaction; A+2B⟶3C+D which of the following expressions does not describe changes in the concentration of various species as a function of time?
Solution

For the given reaction,
(-d[A])/dt=-1/2 d[B]/dt=1/3 d[C]/dt=(d[D])/dt

**Q6. **The velocity constant of a reaction at 290 K was found to be 3.2×〖10〗^(-3) s^(-1). When the temperature is raised to 310 K, it will be about
Solution

Rate constant almost gets doubled by the increase of 10℃ in temperature. Hence, the rate constant at 310 K will be
=3.2×〖10〗^(-3)×(2)^2
( ∵increase in temperature=20 K)
=1.28×〖10〗^(-2) J^(-1)

**Q7.**The term (-dc)/dt in a rate equation refers to
Solution

dc/dt represent the change in concentration of reactant with time. As, in a reaction, concentration of reactant always decrease with time hence, rate of reaction is represented as
(-dc)/dt.

**Q8.**The following data were obtained the first order decomposition of 2 A(g)→B(g)+C(S) at a constant volume and at a particular temperature
SN Time Total pressure in Pascal
1 At the end of 10 min 300
2 After completion 200
The rate constant in min┴(-1)〖is 〗
Solution

**Q9.**For a chemical reaction 2X+Y→Z, the rate of appearance of Z is 0.05 mol L^(-1). The rate of disappearance of X will be
Solution

**Q10. **An endothermic reaction A→B has an activation energy as x kg mol^(-1) of A. If energy change of the reaction is y kJ, the activation energy of the reverse reactions is

Solution

**Q1.**Give relation between half reaction time (t_(1/2))and initial concentration of reactant for (n-1)order reaction.

Solution

Relation between (t_(1/2))and initial concentration of reactant for (n-1)order reaction t_(1/2)∝[R]_0^(2-n)

Relation between (t_(1/2))and initial concentration of reactant for (n-1)order reaction t_(1/2)∝[R]_0^(2-n)

**Q2.**For the reaction N_2+3H_2⇌2NH_3 The rate of change of concentration for hydrogen is 0.3×〖10〗^(-4) Ms^(-1) The rates of change of concentration of ammonia is

Solution

**Q3.**For the reaction system 2NO(g)+O_2 (g)→2NO_2 (g) if the volume of the reaction vessel is reduced to one-third of its original volume, what will be the order of the reaction?

Solution

**Q4.**The rate constant of nth order has units:

Solution

For nth order; unit of rate constant may be derived by K=rate/[reactant]^n

For nth order; unit of rate constant may be derived by K=rate/[reactant]^n

**Q5.**In the reaction; A+2B⟶3C+D which of the following expressions does not describe changes in the concentration of various species as a function of time?

Solution

For the given reaction, (-d[A])/dt=-1/2 d[B]/dt=1/3 d[C]/dt=(d[D])/dt

For the given reaction, (-d[A])/dt=-1/2 d[B]/dt=1/3 d[C]/dt=(d[D])/dt

**Q6.**The velocity constant of a reaction at 290 K was found to be 3.2×〖10〗^(-3) s^(-1). When the temperature is raised to 310 K, it will be about

Solution

Rate constant almost gets doubled by the increase of 10℃ in temperature. Hence, the rate constant at 310 K will be =3.2×〖10〗^(-3)×(2)^2 ( ∵increase in temperature=20 K) =1.28×〖10〗^(-2) J^(-1)

Rate constant almost gets doubled by the increase of 10℃ in temperature. Hence, the rate constant at 310 K will be =3.2×〖10〗^(-3)×(2)^2 ( ∵increase in temperature=20 K) =1.28×〖10〗^(-2) J^(-1)

**Q7.**The term (-dc)/dt in a rate equation refers to

Solution

dc/dt represent the change in concentration of reactant with time. As, in a reaction, concentration of reactant always decrease with time hence, rate of reaction is represented as (-dc)/dt.

dc/dt represent the change in concentration of reactant with time. As, in a reaction, concentration of reactant always decrease with time hence, rate of reaction is represented as (-dc)/dt.

**Q8.**The following data were obtained the first order decomposition of 2 A(g)→B(g)+C(S) at a constant volume and at a particular temperature SN Time Total pressure in Pascal 1 At the end of 10 min 300 2 After completion 200 The rate constant in min┴(-1)〖is 〗

Solution

**Q9.**For a chemical reaction 2X+Y→Z, the rate of appearance of Z is 0.05 mol L^(-1). The rate of disappearance of X will be

Solution

**Q10.**An endothermic reaction A→B has an activation energy as x kg mol^(-1) of A. If energy change of the reaction is y kJ, the activation energy of the reverse reactions is

Solution