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Test: Forming precipitates - Year 7 MCQ


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10 Questions MCQ Test - Test: Forming precipitates

Test: Forming precipitates for Year 7 2024 is part of Year 7 preparation. The Test: Forming precipitates questions and answers have been prepared according to the Year 7 exam syllabus.The Test: Forming precipitates MCQs are made for Year 7 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Forming precipitates below.
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Test: Forming precipitates - Question 1

What is a precipitate?

Detailed Solution for Test: Forming precipitates - Question 1
A precipitate is a solid that forms when two solutions react chemically, resulting in the insolubility of a product which settles out of the solution.
Test: Forming precipitates - Question 2

Which of the following is NOT a method to induce precipitation?

Detailed Solution for Test: Forming precipitates - Question 2
Heating a solution generally increases solubility rather than inducing precipitation.
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Test: Forming precipitates - Question 3

What happens when a precipitate forms in a solution?

Detailed Solution for Test: Forming precipitates - Question 3
When a precipitate forms, it appears as a solid that separates from the solution and settles at the bottom of the container.
Test: Forming precipitates - Question 4
Which of the following is an example of a precipitate?
Detailed Solution for Test: Forming precipitates - Question 4
Calcium carbonate is a white solid that forms as a precipitate when calcium chloride and sodium carbonate solutions are mixed.
Test: Forming precipitates - Question 5
How does the concentration of reactants affect precipitation?
Detailed Solution for Test: Forming precipitates - Question 5
Increasing the concentration of reactants generally accelerates the rate at which a precipitate forms.
Test: Forming precipitates - Question 6
Why is it important to filter precipitates from solutions?
Detailed Solution for Test: Forming precipitates - Question 6
Filtering allows separation of the solid precipitate from the liquid solution, enabling further analysis or use of the precipitate.
Test: Forming precipitates - Question 7
What role does stirring play in precipitate formation?
Detailed Solution for Test: Forming precipitates - Question 7
Stirring helps distribute reactants evenly, increasing contact and accelerating the formation of a precipitate.
Test: Forming precipitates - Question 8
Which chemical reaction typically forms a colored precipitate?
Detailed Solution for Test: Forming precipitates - Question 8
Potassium iodide reacts with lead nitrate to form a bright yellow precipitate of lead iodide.
Test: Forming precipitates - Question 9
How does temperature affect precipitation reactions?
Detailed Solution for Test: Forming precipitates - Question 9
Warmer temperatures generally increase the rate of reaction, including precipitation reactions.
Test: Forming precipitates - Question 10
What is the primary purpose of adding a precipitating agent in a solution?
Detailed Solution for Test: Forming precipitates - Question 10
A precipitating agent is added to promote the formation of a solid product (precipitate) by decreasing the solubility of reactants in the solution.
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