Pollution - Competency Based & Assertion-Reasoning Questions
Practice questions testing deep understanding of biological magnification, acid rain, and ozone depletion.
Antibiotics and Vaccines - Competency Based & Assertion-Reasoning Questions
Practice questions testing deep understanding of antibiotic resistance and immunization principles.
Created by Titas Mallick
Biology Teacher • M.Sc. Botany • B.Ed. • CTET (CBSE) • CISCE Examiner
Practice questions testing deep understanding of controlled variables, hypotheses, and biological experiments.
Q1. A student wants to prove that light is essential for photosynthesis. They take a potted plant, cover one leaf with black paper, and put the plant in the sun. After two days, they test only the covered leaf for starch and find it negative. The student concludes light is essential. A scientist reviews the experiment and says it is flawed because it lacks a "control." Explain what a control is and how the student should fix the experiment.
Q2. Assertion (A): In an experiment to test if exhaled air contains carbon dioxide, lime water is used. Reason (R): Lime water chemically reacts with carbon dioxide to form insoluble calcium carbonate, which turns the clear liquid milky white, acting as a definitive chemical indicator.
/Class-10/Competency-Based-Questions/7_Experimental_Design_CBQ.mdxPollution - Competency Based & Assertion-Reasoning Questions
Practice questions testing deep understanding of biological magnification, acid rain, and ozone depletion.
Antibiotics and Vaccines - Competency Based & Assertion-Reasoning Questions
Practice questions testing deep understanding of antibiotic resistance and immunization principles.