Enthalpy change is the heat change accompanying a chemical reaction at constant ___.
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7%
A. Mass
59%
B. Pressure
31%
C. Temperature
3%
D. Volume
❤5
Dissolving ammonium chloride in water is a/an ___ process.
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28%
A. Exothermic
55%
D. Endothermic
5%
C. Heat releasing
12%
D. None of them
❤3
There is a temperature rise in the surrounding when ___ takes place.
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24%
A. Melting of ice
10%
B. Decomposition of limestone
12%
C. Cooking of rice
54%
D. Combustion of a fuel
❤3
The rate of reaction depends on the rate of successful collisions between reactant particles.
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92%
True
8%
False
❤3
Most heterogeneous catalysts are solid that catalyse either gaseous or liquid reactants.
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74%
True
26%
False
❤4
Reactions that are initiated by heat are called photochemical reactions
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33%
True
67%
False
❤3
In the Boltzmann distribution curve, when the higher temperature is decreased to the lower temperature, the curve shape changes to a flat pattern.
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72%
True
28%
False
❤3
White phosphorus bursts into flame when exposed to ___
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19%
A. Carbon dioxide
7%
B. Soil
71%
C. Air
4%
D. Water
❤5
The rate of reaction is ___ to the time taken.
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24%
A. Directly proportional
71%
B. Inversely proportional
5%
C. Equal
1%
D. None of these
❤3
The rate of reaction becomes double when the temperature is increased by ___ degree
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15%
A. 5
58%
B. 10
19%
C. 20
8%
D. 50
❤3
In the manufacturing ___ by ammonia oxidation (Ostwald process), Platinum-Rhodium catalyst speed up the reaction.
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27%
A. Ammonia
31%
B. Nitric acid
18%
C. Hydrochloric acid
23%
D. Sulphuric acid
❤3
❤3
❤3
In homogeneous chemical equilibrium, the reactants and products of chemical equilibrium are present in more than one phase.
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21%
True
79%
False
❤3😭1
If the external factors are altered, the system will shift to a new state of equilibrium.
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87%
True
13%
False
❤3
Industrial processes are usually designed to give the maximum yield of ___.
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8%
A. Reactants
76%
B. Products
10%
C. Raw materials
6%
D. Catalysts
❤3
The composition of equilibrium mixture does not changed by ___.
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13%
A. Temperature
14%
B. Pressure
6%
C. Concentration
67%
D. Catalyst
❤3
What is the reaction proceeding to the right called?
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83%
A. Forward
12%
B. Reverse
2%
C. Backward
3%
D. Reversible
❤4
The reversible reaction is carried out in the ___ to achieve dynamic equilibrium.
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7%
A. An open system only
75%
B. A closed system only
15%
C. Both open and closed system
3%
D. Air
❤2😢1
Increasing order of pH of the given solution is
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37%
A. Ammonia< ethanoic acid< sodium hydroxide< nitric acid
47%
B. Nitric acid< ethanoic acid< ammonia< sodium hydroxide
16%
C. Nitric acid< ethanoic acid< sodium hydroxide< ammonia
❤6
❤4