Virat
  • 1

The electronic configuration of elements X (2, 4) and Y (2, 8, 1) is given. Based on the information given above, answer the following questions: (a) Which type of bond is formed between X and Y? Explain with reason. (b) How many valence electrons take part in the bond formation between X and Y? Explain. (c) Give the chemical formula of the compound. (d) State one physical property of this compound based on the type of bonding. (e) Write the chemical equation for the reaction of Y with ethanoic acid.

  • 1

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 free sample paper for 2026 board exam

Share

1 Answer

  1. (a) 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.

    (b) Four valence electrons from X and one valence electron from Y participate in bond formation, as X needs to share electrons to complete its octet.
    (c) The chemical formula of the compound is , as X forms four single bonds with four Y atoms.

    (d) The compound is generally a poor conductor of electricity because covalent compounds do not have free ions or electrons to conduct current.

    (e) When element Y (like Na) reacts with ethanoic acid , hydrogen gas is evolved, and the salt sodium ethanoate is formed.

    CH3COOH + Na → CH3COONa + H2 ↑

    • 124
Leave an answer

Leave an answer

Browse