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CBSE Class 7  >  Class 7 Test  >  Year 7 Chemistry (Cambridge)  >  Test: Forming precipitates - Class 7 MCQ

Forming precipitates - Free MCQ Practice Test with solutions, Class 7 Year


MCQ Practice Test & Solutions: Test: Forming precipitates (10 Questions)

You can prepare effectively for Class 7 Year 7 Chemistry (Cambridge) with this dedicated MCQ Practice Test (available with solutions) on the important topic of "Test: Forming precipitates". These 10 questions have been designed by the experts with the latest curriculum of Class 7 2026, to help you master the concept.

Test Highlights:

  • - Format: Multiple Choice Questions (MCQ)
  • - Duration: 20 minutes
  • - Number of Questions: 10

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Test: Forming precipitates - Question 1
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What is a precipitate?

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

Detailed Solution: Question 2

Heating a solution generally increases solubility rather than inducing precipitation.

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Test: Forming precipitates - Question 3
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What happens when a precipitate forms in a solution?

Detailed Solution: 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
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Which of the following is an example of a precipitate?

Detailed Solution: 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
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How does the concentration of reactants affect precipitation?

Detailed Solution: Question 5

Increasing the concentration of reactants generally accelerates the rate at which a precipitate forms.

Test: Forming precipitates - Question 6
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Why is it important to filter precipitates from solutions?

Detailed Solution: 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
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What role does stirring play in precipitate formation?

Detailed Solution: Question 7

Stirring helps distribute reactants evenly, increasing contact and accelerating the formation of a precipitate.

Test: Forming precipitates - Question 8
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Which chemical reaction typically forms a colored precipitate?

Detailed Solution: Question 8

Potassium iodide reacts with lead nitrate to form a bright yellow precipitate of lead iodide (PbI2), which is a well-known and distinctively colored precipitate. While iron sulfate and sodium hydroxide (option D) also form a colored precipitate (greenish iron(II) hydroxide), the bright yellow color of lead iodide is more commonly associated with precipitation reactions in educational contexts due to its vivid and recognizable appearance.

Test: Forming precipitates - Question 9
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How does temperature affect precipitation reactions?

Detailed Solution: Question 9

Lower temperatures generally decrease the solubility of most solids in solution, increasing the likelihood and rate of precipitate formation in precipitation reactions. Higher temperatures, conversely, often increase solubility, making precipitation less likely.

Test: Forming precipitates - Question 10
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What is the primary purpose of adding a precipitating agent in a solution?

Detailed Solution: 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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About this Class 7 Practice Test

This test contains 10 MCQs on Forming precipitates with detailed solutions for each question. It is part of the Year 7 Chemistry (Cambridge) course on EduRev, designed to align with the current Class 7 syllabus. Each solution explains not just the correct answer but also gives you an understanding of the topic — not just to attempt the question but also help you prepare for the exam with practice.

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If you found this Forming precipitates MCQ Test helpful, you can further enhance your Class 7 preparation with in-depth courses on EduRev, for all the subjects and topics available in Year 7 Chemistry (Cambridge) course. The course offers:
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