Chemistry Test

Question 1
5 / -1

Which of the following chemical reactions is a decomposition reaction? (Here A, B, C and D represent any element/ molecule)

A
AB + C → AC + B

B
A + B → AB

C
AB → A + B

D
AB + CD → AD + BC

Question 2
5 / -1

For the reaction 2NO + Br₂ → 2NOBr, the following mechanism is given
$N O + B r_{2} \overset{F a s t}{⇌} N O B r_{2}$
$N O B r_{2} + N O \overset{S l o w}{\to} 2 N O B r$
Hence rate law is

A
k [NO]²[Br₂]

B
k [NO][Br₂]

C
k [NOBr₂][NO]

D
k [NO] [Br₂]²

Question 3
5 / -1

For a reaction CHCl₃ + Cl₂ → CCl₄ + HCl, the rate is given as Rate = k [CHCL₃] [Cl₂]^1/2, the order of the reaction will be

A
2

B
1

C
1.5

D
2.5

Question 4
5 / -1

The value of the rate constant for the gas phase reaction, 2NO₂ + F₂ → 2NO₂F is 38 dm³ mol^-1 s^-1 at 300 K. The order of the reaction is

A
0

B
1

C
2

D
3

Question 5
5 / -1

Half life period of first order reaction is 20 minutes. How long will it take to 75% completion?

A
60 minutes

B
80 minutes

C
40 minutes

D
30 minutes

Question 6
5 / -1

In a homogeneous catalytic reaction 1.0 M of a substrate band 1.0 μM of a catalyst yields 1.0 mM of a product in 10 s. The turnover frequency (TOF) of the reaction (s^-1) is

A
10^-2

B
10²

C
10^-3

D
10³

Question 7
5 / -1

Consider the following two parallel irreversible first order reactions at temperature T,
where k1 and k2 are the constants and their values are 5 × 10-2 and 15 × 10-2 min-1 respectively, at temperature T. If the initial concentration of the reactant 'P' is 4 mol L-1, then the concentration of product 'R' after 10 min of reaction is _______ mol L-1. (Round off to two decimal places)
(Assume only P is present at the beginning of the reaction.)

A
2.59

B
1.59

C
3.59

D
4.59

Question 8
5 / -1

If a plot of lnK vs. 1 / T, gives a straight line, what will be the slope (slope) of the straight line?

A
-E_a / 2.303 R

B
-E_a / RT

C
-E_a / 2.303 RT

D
-E_a / R

Question 9
5 / -1

If the rate of reaction does not depends upon the initial concentration of reactant, the order of reaction is :

A
First

B
second

C
zero

D
third

Question 10
5 / -1

Consider the following reversible chemical reactions:
$A_{2} (g) + B_{2} (g) \begin{matrix} K_{1} \\ ⇌ \end{matrix} 2 A B (g)$ …. (1)
$6 A B (g) \begin{matrix} K_{2} \\ ⇌ \end{matrix} 3 A_{2} (g) + 3 B_{2} (g)$ …. (2)
The relation between K₁ and K₂ is:

A
K1 × K2 = 1/3

B
K₂ = K₁⁺³

C
K₂ = K₁^-3

D
K₁ × K₂ = 3

Submit Test

Chemistry Test ...

Question 1

AB + C → AC + B

A + B → AB

AB → A + B

AB + CD → AD + BC

Question 2

k [NO]2[Br2]

k [NO][Br2]

k [NOBr2][NO]

k [NO] [Br2]2

Question 3

2

1

1.5

2.5

Question 4

0

1

2

3

Question 5

60 minutes

80 minutes

40 minutes

30 minutes

Question 6

10-2

102

10-3

103

Question 7

2.59

1.59

3.59

4.59

Question 8

-Ea / 2.303 R

-Ea / RT

-Ea / 2.303 RT

-Ea / R

Question 9

First

second

zero

third

Question 10

K1 × K2 = 1/3

K2 = K1+3

K2 = K1-3

K1 × K2 = 3

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Question Analysis

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k [NO]²[Br₂]

k [NO][Br₂]

k [NOBr₂][NO]

k [NO] [Br₂]²

10^-2

10²

10^-3

10³

-E_a / 2.303 R

-E_a / RT

-E_a / 2.303 RT

-E_a / R

K₂ = K₁⁺³

K₂ = K₁^-3

K₁ × K₂ = 3