A is true but R is false. Rusting of iron is a chemical process but not endothermic; it is a slow exothermic reaction, releasing little heat. Since the heat released is negligible, it often goes unnoticed, making the given ...
Discussion Forum Latest Questions
The correct answer is option (c) glass slab. When a parallel beam of light passes through a glass slab, it emerges parallel but laterally displaced. Unlike mirrors, lenses, or prisms, only a glass slab produces this unique lateral displacement effect. latest ...
Two observations that indicate a chemical change are: (1) Formation of a new substance, such as a gas, precipitate, or color change. (2) Release or absorption of energy, like heat, light, or sound, during the reaction. 2025-26 sample paper question available ...
Self-pollination occurs when pollen from a flower’s anther falls on its own stigma, ensuring genetic similarity. Cross-pollination occurs when pollen from one flower reaches the stigma of another, promoting genetic variation. extra cbse sample paper download on Tiwari Academy latest cbse sample ...
The phloem in plants transports food, mainly sucrose, from the leaves where it is produced to all other parts of the plant, including roots, stems and fruits, supplying energy and materials necessary for growth, storage and development. Download cbse sample paper ...