Carbon And Its Compounds (VSAQs)

Physical Science | 12. Carbon And Its Compounds – VSAQs:
Welcome to VSAQs in Chapter 12: Carbon And Its Compounds. This page contains the most important VSAQs in this chapter. Aim to secure top marks in your exams by understanding these clear and straightforward Very Short Answer Questions.

VSAQ-1 : What are hydrocarbons?

Hydrocarbons:

  1. Definition: Hydrocarbons are organic compounds consisting exclusively of carbon (C) and hydrogen (H) atoms.
  2. Simplicity: They represent the simplest class of organic compounds.
  3. Role: Serve as fundamental building blocks for a diverse array of organic molecules.
  4. Variety: Exist in different forms like alkanes, alkenes, and alkynes, distinguished by their carbon-carbon bonding types.
  5. Examples:
    • Alkanes: Characterized by single bonds between carbon atoms.
    • Alkenes: Contain at least one double bond between carbon atoms.
    • Alkynes: Have at least one triple bond between carbon atoms.

VSAQ-2 : Name some crystalline forms of allotropes of carbon.

Crystalline Allotropes of Carbon:

  1. Diamond: A form of carbon where each atom is tetrahedrally bonded to four other carbon atoms, known for its hardness and brilliance.
  2. Graphite: Consists of carbon atoms in layers, with each atom bonded to three others in a plane, notable for its lubricating properties and use in pencil leads.
  3. Buckminsterfullerene (C60): A spherical molecule composed of 60 carbon atoms, resembling a soccer ball in structure, named after architect Buckminster Fuller.

VSAQ-3 : Write two uses of ethanol in day to day life.

Uses of Ethanol in Daily Life:

  1. Alcoholic Beverages: Ethanol is the primary alcohol in alcoholic beverages, used for its psychoactive and flavoring properties.
  2. Pharmaceuticals: In pharmaceuticals, ethanol serves as a solvent and preservative in products like cough syrups and tonics.

VSAQ-4 : Mention any two uses of graphite in day to day life.

Uses of Graphite in Daily Life:

  1. Pencil Lead: Graphite is widely used as pencil lead for writing and drawing, due to its ability to leave a dark mark on paper.
  2. Lubricant: Its slippery nature makes graphite an effective lubricant in mechanical applications, particularly where oil-based lubricants are unsuitable.

VSAQ-5 : Why do the various micelles present in water do not come together to form a precipitate, Guess the reason.

  1. Surface Charge Repulsion: The micelles stay separate due to repulsion between charged ions on their surfaces.
  2. Prevents Aggregation: This electrostatic repulsion prevents the micelles from aggregating into a precipitate.