To obtain an image of magnification M = − 1, the image must be real, inverted and of the same size as the object. This happens when the object is placed at twice the focal length of a convex lens. ...
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Auxins are plant hormones that stimulate cell elongation on the side of the shoot away from light, causing the shoot to bend towards light. This process is called phototropism, helping the plant capture sunlight efficiently. The correct answer is (D) ...
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, ...
(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 ...
Carbon does not have a strong tendency to lose or gain electrons completely. Instead, it has 4 valence electrons and typically shares electrons with other atoms to achieve a stable configuration. The correct answer is D: A is false but ...