Units and Measurements is the opening chapter of NCERT Class 11 Physics and the base for every numerical you will solve in NEET. It covers the SI system of units, significant figures, errors in measurement and their propagation, and dimensional analysis with its uses and limitations. NEET regularly asks direct questions on dimensions and errors, so this chapter offers easy marks with enough practice. These free MCQ practice tests are timed, scored instantly and come with a full answer review, and new question sets are published regularly.