Top 50 CBSE Class 12 Chemistry MCQs with Answers are available for Pre-Board and Board Exam 2026. Check this article to practise MCQs based on past year question papers.

Reaction kinetics and dynamics refers to the study of why, how and how fast chemical processes take place. Chemists seek to understand the details of change at the molecular and quantum level and how ...

Food allergy symptoms can start quickly after eating and may last from minutes to a couple of days. Seasonal allergy symptoms can last for weeks or even months if exposure to the allergen continues.

Classically, chemical reactions encompass changes that strictly involve the motion of electrons in the forming and breaking of chemical bonds, although the general concept of a chemical reaction, in ...

Your body goes through three stages of stress: alarm, resistance, and exhaustion. In the resistance stage, your body tries to repair itself but may stay stressed without relief. Prolonged stress and ...