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Quiz 3
Mdcat-past-papers - NMDCAT - Chemistry Quiz
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Board: NMDCAT | Subject: Chemistry |
41. The oxidation state of sulphur in (S2O3)²⁻ is:
2.5
6
3
2
42. The common oxidation number of halogens is:
-1
1
-2
2
43. During oxidation process, oxidation number of an element:
Decreases
Increases
Remains constant
Both a & b
44. Lower members in electrochemical series cause:
Reduction
Oxidation
Are noble gases
Do not give any reaction
45. Element with highest reduction potential is:
F
Cl
Li
Mg
46. Reduction of copper is due to electrode potential of:
0.76
-0.76
0.34
-0.34
47. When the concentration of A(g) doubles, the rate of reaction increases four folds. This means it is a:
Negative order reaction
First order reaction
Zero order reaction
Second order reaction
48. For which of the following orders of reaction, the rate of reaction is inversely proportional to the concentration?
1st order
2nd order
Negative order
Zero order reaction
49. The sum of exponents in the rate equation gives:
Half life
Velocity constant
Order of reaction
Chemical equilibrium
50. Which order of reaction obeys the formula t₁⁄₂ = 1/ka?
Zero
1st
2nd
3rd
51. Half-life of a first order reaction is:
1/ka
0.693/ka
0.693/k
0.693a/k
52. Activated complex consists of:
Maximum energy
Minimum energy
Is a stable state
Large half-life
53. 'e' in Arrhenius equation is:
Activation energy
Temperature
Arrhenius constant
Base of natural logarithm
54. When colliding molecules come close to each other, they --- to go to transition complex:
Collide fast
Slow down
Does not depend upon energy
Increase their kinetic energy
55. For exothermic reaction:
Products are at higher energy state than reactants
Products and reactants are at same energy level
Products are at lower energy state than reactants
Products have higher entropy than reactants
56. The energy of activation for forward and backward reactions are:
Same for all
Different for all
For some same/different
Zero
57. Unit of activation energy is:
J•K⁻¹
J•K⁻¹•mol⁻¹
J/mol
K
58. In periodic table, period number tells the:
No. of protons
Electrons
Number of shells
Charge on atoms
59. In K₄[Fe(CN)₆], the number of ligands are:
6
1
7
10
60. Complex compounds have:
Complex structure
Complex ion & can exist independently
Can't exist independently
Both a & b
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