Question

For the reaction N2 + 3H2 → 2NH3 if Δ[NH3]Δt = 2 × 10-4 mol L-1s-1, the value of −Δ[H2]Δt would be:

2 points

(a) 1 × 10-4 mol L-1s-1

(b) 3 × 10-4 mol L-1s-1

(c) 4 × 10-4 mol L-1s-1

(d) 6 × 10-4 mol L-1s-1

If 50% of a reaction occurs in 100 seconds and 75% of the reaction occurs in 200 seconds, the order of this reaction is

2 points

1

2

zero

3

The half-life period of a first-order chemical reaction is 6.93 minutes. The time required for the completion of 99% of the chemical reaction will be (log 2 = 0.301): *

2 points

46.06 minutes

(2) 460.6 minutes

(3) 230.3 minutes

(4) 23.03 minutes

The rate of a reaction doubles when its temperature changes from 300 K to 310 K. Activation energy of such a reaction will be (R = 8.314KJmol-1 and log 2=0.301)

2 points

53.6 KJmol-1

(2) 48.6 KJmol-1

(3) 58.5 KJmol-1

(4) 60.5 KJmol-1

The rate of a certain hypothetical reactionA + B + C → productsis given by r = −d[A]dtK[A]1/2[B]1/3[C]1/4. The order of the reaction is

2 points

13/14

12/13

13/12

13/11

The time for half-life period of a certain reaction A → Products is 1 hour when the initial concentration of the reactant ‘A’ is 2.0 mol L–1, How much time does it take for its concentration to come from 0.50 to 0.25 mol L–1 if it is a zero-order reaction?

2 points

1 h

4 h

0.5 h

0.25 h

In a first-order reaction, the concentration of the reactant, decreases from 0.8 M to 0.4 M in 15 minutes. The time taken for the concentration to change from 0.1 M to 0.025 M is

2 points

30 minutes

15 minutes

7.5 minutes

60 minutes.

The half life of the first order reaction having rate constant K = 1.7 x 10-5s-1 is *

2 points

(a) 12.1 h

(b) 9.7 h

(c) 11.3 h

(d) 1.8 h

The rate constant of zero-order reactions has the unit

2 points

s-1

mol L-1 s-1

L2 mol-2 s-1

L mol-1 s-1

A substance ‘A’ decomposes by a first-order reaction starting initially with [A] = 2.00M and after 200min, [A] becomes 0.15M. For this reaction t1/2 is *

2 points

53.72 min

50.49 min

48.45 min

46.45 min​

Answer 1

Answer:

ggh security தேனிலவுதொழில்நுட்ப do so stop பேச்சுரிமை எட்துக்குச்திகோ ஏற்ச்தும்பிப் செட்சும்போ எதுக்கோ எதிமிப்போ எதுவும் ப் எது சரி சிப் சி டி எடு uukhgghujhfgyujncfyjftyh

Explanation:

7giggigogogigogigibiblhkhkhih ஐக் ojojj9ஓஹோ