The bond formed between X and Y is a covalent bond, because element X (carbon) shares its valence electrons with element Y (hydrogen – like or sodium) to achieve a stable configuration. Download cbse sample paper for class 10 science class 10 ...
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(a) Aluminium reacts with dilute HCl in an exothermic reaction, releasing heat and hydrogen gas, causing the temperature to rise. (b) Sodium reacts vigorously with HCl due to its high reactivity, producing hydrogen gas rapidly with heat. (c) Lead reacts ...
(I) Combustion: C₂H₅OH + 3O₂ → 2CO₂ + 3H₂O (II) Dehydration: C₂H₅OH →[conc. H₂SO₄, 443 K] C₂H₄ + H₂O (III) Oxidation: C₂H₅OH + [O] → CH₃CHO + H₂O (using acidified K₂Cr₂O₇) CBSE Sample Paper Class 10 Science 2025-26 Tiwari Academy provides CBSE Class 10 ...
X: Alcohol (ethanol, C₂H₅OH) – a good solventY: Hydrogen gas (H₂)Z: Sodium ethoxide (C₂H₅ONa) – used in making vegetable ghee Reaction: 2C₂H₅OH + 2Na → 2C₂H₅ONa + H₂↑ 10 years solved cbse sample paper for class 10 science 2026 board exam ...