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Grade 11 Exam  >  Grade 11 Tests  >  Chemistry for Grade 11 (IGCSE)  >  Test: Reversible Reactions - Grade 11 MCQ

Test: Reversible Reactions - Grade 11 MCQ


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10 Questions MCQ Test Chemistry for Grade 11 (IGCSE) - Test: Reversible Reactions

Test: Reversible Reactions for Grade 11 2024 is part of Chemistry for Grade 11 (IGCSE) preparation. The Test: Reversible Reactions questions and answers have been prepared according to the Grade 11 exam syllabus.The Test: Reversible Reactions MCQs are made for Grade 11 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Reversible Reactions below.
Solutions of Test: Reversible Reactions questions in English are available as part of our Chemistry for Grade 11 (IGCSE) for Grade 11 & Test: Reversible Reactions solutions in Hindi for Chemistry for Grade 11 (IGCSE) course. Download more important topics, notes, lectures and mock test series for Grade 11 Exam by signing up for free. Attempt Test: Reversible Reactions | 10 questions in 10 minutes | Mock test for Grade 11 preparation | Free important questions MCQ to study Chemistry for Grade 11 (IGCSE) for Grade 11 Exam | Download free PDF with solutions
Test: Reversible Reactions - Question 1
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What characteristic distinguishes reversible reactions from irreversible reactions?

Detailed Solution for Test: Reversible Reactions - Question 1
Reversible reactions are characterized by their ability to proceed in both forward and reverse directions. This means that in a reversible reaction, the products can react to form the original reactants. This dynamic behavior sets them apart from irreversible reactions, where the reaction only proceeds in one direction.
Test: Reversible Reactions - Question 2
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What is the defining feature of completion of reactions in reversible reactions?

Detailed Solution for Test: Reversible Reactions - Question 2
In reversible reactions, the completion of reactions occurs when reactants are entirely used up to produce product molecules. This signifies that the reaction halts when all the reactants have been exhausted. The concept of completion is crucial in understanding the equilibrium dynamics of reversible reactions.
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Test: Reversible Reactions - Question 3
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What term describes the dual nature of reversible reactions?

Detailed Solution for Test: Reversible Reactions - Question 3
The dual nature of reversible reactions is encapsulated in the term "bi-directional process." This term highlights the ability of reversible reactions to proceed in two ways: the forward reaction, leading to the formation of products, and the reverse reaction, resulting in the regeneration of reactants. This bidirectional characteristic is fundamental to the behavior of reversible reactions.
Test: Reversible Reactions - Question 4
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Which aspect of reversible reactions allows product molecules to either react with each other or break down to reform the original reactant molecules?
Detailed Solution for Test: Reversible Reactions - Question 4
The aspect of reversible reactions known as the "reversible nature" enables product molecules to either react with each other to form reactants or break down to reform the original reactant molecules. This flexibility in the behavior of product molecules contributes to the dynamic and reversible nature of these chemical reactions.
Test: Reversible Reactions - Question 5
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What distinguishes hydrated salts from anhydrous salts?
Detailed Solution for Test: Reversible Reactions - Question 5
Hydrated salts contain water of crystallization, which is water molecules that are chemically bound within the crystal structure of the salt. Anhydrous salts, on the other hand, do not contain water of crystallization as they have undergone dehydration. The presence or absence of water of crystallization can significantly impact the physical properties of salts, such as their color and crystal structure.
Test: Reversible Reactions - Question 6
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What process is depicted in the image showing the dehydration of hydrated cobalt(II) chloride?
Detailed Solution for Test: Reversible Reactions - Question 6
The image illustrates the dehydration of hydrated cobalt(II) chloride, a process where water molecules are removed from the crystal structure of the salt, resulting in the formation of anhydrous cobalt(II) chloride. Dehydration reactions involve the removal of water molecules from a compound, often through heating, leading to the formation of a different chemical species.
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How does the presence of water of crystallization influence the properties of hydrated salts?
Detailed Solution for Test: Reversible Reactions - Question 7
The presence of water of crystallization in hydrated salts plays a crucial role in determining their crystal structure and shape. The water molecules integrated into the crystal lattice influence the physical properties of the salt, such as its color, solubility, and stability. Removal of water of crystallization through dehydration can lead to changes in the appearance and properties of the salt.
Test: Reversible Reactions - Question 8
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What happens to the pink crystals of hydrated cobalt(II) chloride when heated in a test tube?
Detailed Solution for Test: Reversible Reactions - Question 8
When the pink crystals of hydrated cobalt(II) chloride are heated in a test tube, they revert to their original blue color. This change occurs as the crystals lose water of crystallization, resulting in the transformation back to anhydrous cobalt(II) chloride, which is blue in color.
Test: Reversible Reactions - Question 9
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What color do anhydrous blue cobalt(II) chloride crystals change to when added to water, indicating a reversible reaction?
Detailed Solution for Test: Reversible Reactions - Question 9
Anhydrous blue cobalt(II) chloride crystals change to pink when added to water, indicating a reversible reaction. This color change is due to the hydration of cobalt(II) chloride, where water molecules become incorporated into the crystal structure, leading to the observed pink coloration.
Test: Reversible Reactions - Question 10
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What occurs when hydrated cobalt(II) chloride is heated, causing it to lose its water of crystallization?
Detailed Solution for Test: Reversible Reactions - Question 10
When hydrated cobalt(II) chloride is heated, it loses its water of crystallization, resulting in the transformation into anhydrous cobalt(II) chloride. This process involves the removal of water molecules from the crystal structure, leading to the formation of the anhydrous form of the compound.
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