Oxidation is the addition of oxygen to a substance or the removal of hydrogen from a substance. The reaction in which heat energy is produced is called exothermic reaction.

As, light is scattered by the air molecules present in atmosphere and blue colour has shorter wavelength, so it is scattered most and the earth would appear blue.

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

(i) Photosynthesis in plants (ii) Respiration in the human body (iii) Decomposition of vegetable matter (iv) Decomposition of ferrous sulphate.

For example, at sunrise and sunset, the distance between us and the Sun is greater. Therefore, the light has to travel the longest distance during these times.

When electricity is passed through an aqueous solution of sodium chloride (called brine), it decomposes to form sodium hydroxide. The process is called the chloralkaline process because of the products formed-chlor for chlorine and alkali for sodium hydroxide.

Arteries carry blood from the heart to various organs of the body. They generally carry oxygen rich blood except for pulmonary artery. Pulmonary artery is the only artery that carries carbon dioxide rich blood from heart to lungs.

We must be aware that the lungs supply oxygenated blood to the left atrium of the heart. Gradually, it contracts and blood is allowed to enter the next chamber (the left ventricle) as it expands. When the left lower chamber ...

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

Here, the sized of the object. h = 10 mm = 1 cm Size of the image h₁ = 5 mm = 0.5 cm Distance of image from the pole of mirror v = – 30 cm Let distance of ...