Chemical Kinetics Reaction Rates! Trivia Quiz

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Questions: 10 | Attempts: 252 | Updated: Mar 22, 2023

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Chemical Kinetics Reaction Rates! Trivia Quiz - Quiz

Chemical reacts at different rates and could be altered(either to speed or slow the reaction) by various factors. Reaction rate, the speed at which a chemical reaction proceeds. The rate of response is always positive, except in cases where the Concentration is decreasing with time.

Questions and Answers

1.

Rate of change of Concentra per time is given to what term?
- A.
  
  Change rate
- B.
  
  Reaction Rates
- C.
  
  Stochiometry
- D.
  
  Mole difference
Correct Answer
B. Reaction Rates

Explanation
The correct answer is Reaction Rates because the question is asking for the term that represents the rate of change of concentration over time. Reaction rates refer to the speed at which a chemical reaction occurs, specifically the change in concentration of reactants or products per unit of time. Therefore, it is the most appropriate term to describe the given concept.

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2.

Which of these cannot affect rate of reaction?
- A.
  
  Temperature
- B.
  
  Catalyst
- C.
  
  Preservatives
- D.
  
  Nature of reactant
Correct Answer
C. Preservatives

Explanation
Preservatives cannot affect the rate of reaction because they are substances added to products to prevent spoilage or decay. They do not participate in the chemical reaction itself and do not alter the reaction rate. Temperature, catalysts, and the nature of reactants, on the other hand, can all significantly impact the rate of a chemical reaction. Temperature affects the kinetic energy of particles, catalysts provide an alternative reaction pathway with lower activation energy, and the nature of reactants determines the ease with which they can react.

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3.

Atoms, ions, and molecules can react to form products when they collide, provided that the particles have enough kinetic energy. Which theory is this?
- A.
  
  Atomic theory
- B.
  
  Collision theory
- C.
  
  Formation Theory
- D.
  
  Reaction theory
Correct Answer
B. Collision theory

Explanation
The correct answer is Collision theory. This theory explains that atoms, ions, and molecules can react to form products when they collide, as long as they have enough kinetic energy. It emphasizes the importance of collisions between particles in chemical reactions and how energy transfer during these collisions determines whether a reaction will occur.

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1
0
4.

What is the substance that initiates or accelerates a chemical reaction without itself being affected?
- A.
  
  Solid
- B.
  
  Catalyst
- C.
  
  Reactant
- D.
  
  None
Correct Answer
B. Catalyst

Explanation
A catalyst is a substance that initiates or accelerates a chemical reaction without itself being affected. It works by providing an alternative pathway for the reaction to occur, lowering the activation energy required for the reaction to proceed. This allows the reaction to happen at a faster rate and with less energy input. The catalyst itself remains unchanged at the end of the reaction, making it available for use in subsequent reactions.

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1
0
5.

What is the amount of energy needed for a reaction to occur?
- A.
  
  Head start energy
- B.
  
  Activation energy
- C.
  
  Startup energy
- D.
  
  None
Correct Answer
B. Activation energy

Explanation
Activation energy is the amount of energy required for a reaction to occur. It is the minimum energy needed for reactant molecules to overcome the energy barrier and initiate the reaction. Without this energy, the reaction cannot proceed. The term "head start energy" and "startup energy" are not commonly used in chemistry to describe the energy required for a reaction. Therefore, the correct answer is activation energy.

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6.

What is the reaction that absorbs energy in the form of heat Called?
- A.
  
  Absorbent reaction
- B.
  
  Endothermic reaction
- C.
  
  Heat reaction
- D.
  
  Temperature change reaction
Correct Answer
B. Endothermic reaction

Explanation
An endothermic reaction is a type of chemical reaction that absorbs energy in the form of heat from its surroundings. In this reaction, the products have higher energy than the reactants, and the overall change in energy is positive. This means that heat is being taken in or absorbed during the reaction. The opposite of an endothermic reaction is an exothermic reaction, where heat is released.

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7.

What is the reaction that releases energy in the form of heat called?
- A.
  
  Exothermic reaction
- B.
  
  External reaction
- C.
  
  Ectothermic reaction
- D.
  
  Enviromental reaction
Correct Answer
A. Exothermic reaction

Explanation
An exothermic reaction is a chemical reaction that releases energy in the form of heat. In this type of reaction, the products have less energy than the reactants, resulting in the release of excess energy in the form of heat. This can often be observed as an increase in temperature in the surroundings.

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8.

What is the system in which both energy and matter are exchanged with the surroundings?
- A.
  
  Free system
- B.
  
  General system
- C.
  
  Interactive system
- D.
  
  Open system
Correct Answer
D. Open system

Explanation
An open system is a system in which both energy and matter can be exchanged with the surroundings. In an open system, there is a continuous flow of energy and matter between the system and its surroundings, allowing for interactions and exchanges to occur. This is in contrast to a closed system, where only energy can be exchanged, and a isolated system, where neither energy nor matter can be exchanged.

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1
0
9.

What is the system in which no matter is allowed to enter or leave?
- A.
  
  Deterministic system
- B.
  
  Fixed system
- C.
  
  Static system
- D.
  
  Closed system
Correct Answer
D. Closed system

Explanation
A closed system is a system in which no matter is allowed to enter or leave. This means that the system is isolated from its surroundings and there is no exchange of matter with the external environment. In a closed system, the total amount of matter remains constant, although energy can still be exchanged with the surroundings. This concept is often used in thermodynamics to analyze the behavior of physical systems.

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10.

Which of these reacts the fastest?
- A.
  
  Small surface area
- B.
  
  Fewer ionic bond
- C.
  
  Loose bonds
- D.
  
  None
Correct Answer
B. Fewer ionic bond

Explanation
Fewer ionic bonds react faster because ionic bonds are relatively stronger compared to other types of bonds. When there are fewer ionic bonds present, it means there are more opportunities for other types of bonds, such as covalent bonds, to form. Covalent bonds are generally weaker and more reactive than ionic bonds. Therefore, a system with fewer ionic bonds will have a faster reaction rate.

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