Aluminium does not rust like iron because it forms a protective oxide layer (Al₂O₃) that prevents further corrosion. Its dull appearance can be prevented by polishing or anodizing, which maintains shine. Aluminium is preferred for roofing because it is lightweight, ...
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(i) Name of element ‘Z’: Aluminium (Al) (ii) Method of extraction: Aluminium is extracted from bauxite (Al₂O₃·2H₂O) by electrolytic reduction because it is highly reactive and cannot be reduced by carbon. The purified alumina is dissolved in molten cryolite (Na₃AlF₆) to ...
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) 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 ...
Haemodialysis removes wastes and excess water from blood when kidneys fail. Blood passes through a dialysis machine with a semipermeable membrane. Limitations: temporary, cannot replace all kidney functions. Precautions: follow fluid restrictions and maintain hygiene to prevent infections. CBSE Sample Paper ...