Balancing Chemical Equations! Trivia Questions Quiz

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Questions: 10 | Attempts: 431 | Updated: Mar 22, 2023

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Balancing Chemical Equations! Trivia Questions Quiz - Quiz

Chemical equations include chemical formulae that represent all substances that are involved in the reaction. When it comes to balancing chemical equations, proper attention must be given to both reactants and product sides of the chemical equation. The rule of balancing the equation is making sure that the number of moles on both sides is equal. Do you know how to balance chemical equations?

Questions and Answers

1.

What law is most important in balancing chemical equations?
- A.
  
  Avogadro's law
- B.
  
  Charle's law
- C.
  
  Gay Lussac's law
- D.
  
  Law of conservation of mass
Correct Answer
D. Law of conservation of mass

Explanation
The law of conservation of mass is the most important law in balancing chemical equations. This law states that matter cannot be created or destroyed in a chemical reaction, it can only be rearranged. Balancing chemical equations involves making sure that the number of atoms of each element is the same on both sides of the equation, which follows the principle of the conservation of mass. This law is fundamental in chemistry and is essential for understanding and predicting chemical reactions.

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2.

How many are the standard methods to balancing chemical equations?
- A.
  
  Two methods
- B.
  
  Four methods
- C.
  
  Six methods
- D.
  
  Three methods
Correct Answer
A. Two methods

Explanation
There are two standard methods to balancing chemical equations. The first method is the inspection method, where one can visually balance the equation by adjusting the coefficients of the reactants and products. The second method is the algebraic method, where one can use mathematical equations to balance the equation by setting up a system of linear equations and solving for the unknown coefficients. These two methods are commonly used in chemistry to ensure that the number of atoms on both sides of the equation is equal.

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3.

Which of these is not a method of balancing chemical equations?
- A.
  
  Inspection method
- B.
  
  Matrix method
- C.
  
  Linear equation method
- D.
  
  Elimination method
Correct Answer
D. Elimination method

Explanation
The elimination method is not a method of balancing chemical equations. The inspection method involves visually balancing the equation by adjusting coefficients. The matrix method uses matrices to solve a system of linear equations. The linear equation method involves setting up and solving a system of linear equations to balance the equation. However, the elimination method is not a recognized method for balancing chemical equations.

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4.

When was the first time a chemical equation was diagrammed?
- A.
  
  1615
- B.
  
  1781
- C.
  
  1923
- D.
  
  1613
Correct Answer
A. 1615

Explanation
In 1615, the first chemical equation was diagrammed. This marked a significant development in the field of chemistry as it allowed scientists to visually represent the chemical reactions and understand the relationship between reactants and products. Prior to this, chemical reactions were described using written descriptions, which made it difficult to communicate and comprehend the processes involved. The diagramming of chemical equations revolutionized the way chemical reactions were understood and studied, laying the foundation for modern chemistry.

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5.

Who developed the first diagram for a chemical equation?
- A.
  
  Jean Lamarck
- B.
  
  Fred Logan
- C.
  
  Eddie Strong
- D.
  
  Jean Benguin
Correct Answer
D. Jean Benguin

Explanation
Jean Benguin developed the first diagram for a chemical equation.

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6.

Which of these is irrelevant in chemical equation?
- A.
  
  Forward reaction
- B.
  
  Reactants
- C.
  
  Backward reaction
- D.
  
  Heat of reaction
Correct Answer
D. Heat of reaction

Explanation
In a chemical equation, the heat of reaction is not directly relevant. It is not included in the balanced equation itself and does not affect the stoichiometry or the identity of the reactants and products. While heat is often involved in chemical reactions and can influence the rate and direction of the reaction, it is not considered a fundamental component of the equation. The other options, forward reaction, reactants, and backward reaction, are all essential components that describe the process and composition of the reaction.

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7.

What is the coefficient of a chemical formula without coefficient?
- A.
  
  2
- B.
  
  4
- C.
  
  1
- D.
  
  5
Correct Answer
C. 1

Explanation
The coefficient of a chemical formula without a coefficient is assumed to be 1. In chemical equations, coefficients are used to balance the number of atoms on each side of the equation. If a chemical formula does not have a coefficient explicitly written, it is understood to have a coefficient of 1.

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8.

What is usually the number of charge of a sodium ion?
- A.
  
  1
- B.
  
  -1
- C.
  
  2
- D.
  
  -2
Correct Answer
A. 1

Explanation
A sodium ion typically has a charge of +1. This is because sodium is a group 1 element in the periodic table, meaning it has one valence electron. In order to achieve a stable electron configuration, sodium tends to lose this electron, resulting in a positive charge of +1.

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9.

What is the number of charge of an element in a free state?
- A.
  
  1
- B.
  
  2
- C.
  
  3
- D.
  
  0
Correct Answer
D. 0

Explanation
In a free state, an element has a charge of 0. This means that the element has an equal number of protons and electrons, resulting in a neutral charge. Protons have a positive charge, while electrons have a negative charge. When the number of protons and electrons is balanced, the overall charge of the element is zero.

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1
0
10.

What gas is produced when hydrochloric acid and sodium reacts?
- A.
  
  Chlorine
- B.
  
  Hydrogen
- C.
  
  Sulphur
- D.
  
  Sodium
Correct Answer
B. Hydrogen

Explanation
When hydrochloric acid reacts with sodium, it produces hydrogen gas. This is because hydrochloric acid is a strong acid and sodium is a highly reactive metal. The reaction between them is a displacement reaction, where the hydrogen in the acid is displaced by the sodium, forming sodium chloride and releasing hydrogen gas as a byproduct.

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