Sodium and potassium react violently with the release of huge amount of heat. So the reaction is highly exothermic. Hydrogen gas which is produced during the reaction catches fire. Calcium reacts less violently with water. The heat evolved is not ...

When oxygen reacts with UV rays it breaks down as free oxygen (O) atoms. Again free atoms combine with oxygen and creates O₃. O₂ + UV → O + O O + O₂ → O₃

Class 10 Science Terminal Exams MCQ Solutions Class X Science MCQ Extra Questions Answers Class 10th Science Session 2022-23 10th Science Terminal Exam Based MCQ Extra Questions

When we beat blanket with the help of stick, then it comes into motion. But the dust particles continue to be at rest due to inertia and get detached from the blanket.

Unbalanced force can only change the state of motion of an object but not the shape or size.

Let distance between “A and B” be d. Average speed =Total distance/Total time = 2V₁.V₂/ V₁ + V₂

Given, Speed=0.06m/s =0.06×3600/1000km/h =0.216km/h