(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 ...
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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 ...
The correct answer is [B]. When excess carbon dioxide is passed through lime water, the initially formed insoluble calcium carbonate reacts further with CO₂ and water to form water-soluble calcium bicarbonate, causing the milkiness in lime water to disappear. 2026 board ...
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 ...
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 ...