The name of the reaction that converts alkenes (A) into alkanes (C) is hydrogenation. The condition which are necessary for this reaction are the present of a catalyst (Ni) and the temperature should be 423 K. 2026 board exam extra sample ...
Category: Class 10 Science
NCERT Solutions for Class 10 Science and important questions for CBSE class 10 for session 2020-2021
Discussion Forum Latest Questions
During the preparation of hydrogen chloride gas, the gas is usually passed through the guard tube containing calcium chloride during humid climate, as calcium chloride is a good drying agent and absorbs moisture from the gas. Tiwari Academy provides CBSE Class ...
The correct answer is [A] (ii) and (iv).‘A’ represents the diaphragm. During inhalation, it flattens and helps the chest cavity to become larger, allowing air to enter the lungs. It doesn’t decrease residual volume.
The correct answer is [B] Hydrochloric acid, Pepsin, Mucus. In the human alimentary canal, gastric glands of the stomach secrete hydrochloric acid to kill germs, pepsin to digest proteins, and mucus to protect stomach lining.
The correct answer is (B) maintaining posture, balancing the body, coordinating voluntary movements.The cerebellum controls balance, posture, and smooth coordination of voluntary muscles, ensuring precise and coordinated body movements. CBSE Sample Paper Class 10 Science 2025-26 Tiwari Academy provides CBSE Class ...