Class X Science MCQ Extra Questions Answers Class 10 Science Terminal Exams MCQ Solutions Class 10th Science Session 2021-22 10th Science Terminal Exam Based MCQ Extra Questions

As the student wants to show that carbon dioxide is essential for photosynthesis, he sealed both the bell jars with Vaseline (- petroleum product) and placed KOH in one bell jar as KOH absorbs CO₂ gas present in the bell ...