Name the green chemistry principle illustrated by a given practice

This type of question, asked 3 times: 21 Apr 2025 S1, 23 Apr 2025 S1, 15 May 2026 S2. All 3 questions below, oldest first.

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Question 1
21 Apr 2025 S1
61 $Which of the following principal of green chemistry suggest use of chemicals made from plant-based sources?$
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Question 2
23 Apr 2025 S1
89 $Identify the principle suggesting avoiding protection and deprotection of selective group for organic reactions in green chemistry.$
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Question 3
15 May 2026 S2
16 $Bottom ash of thermal power stations can be used as raw material for cement and brick industry. This example illustrates which of the following principle of green chemistry?$
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Question 1