Olympiad – Class X – Science - Che - Carbon and Its Compounds

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Question - 1

Identify the product formed when ethanol reacts with sodium.

  • A Sodium ethanoate
  • B Sodium ethoxide
  • C Sodium ethanol
  • D Sodium acetate

Question - 2

Which of the given feature(s) of carbon enables it to form a large number of compound(s)?

  • A Tetravalency
  • B Catenation
  • C Atomic size
  • D Both (A) and (B)

Question - 3

Which property of methane helps it to be used as a fuel?

  • A It burns exothermically
  • B It is a gas
  • C It is odourless
  • D It has a low boiling point.

Question - 4

All the members of a homologous series have the same

  • A empirical formula
  • B general formula
  • C molecular formula
  • D physical properties.

Question - 5

Vinegar is a solution of ethanoic acid made by the reaction of ethanol with air. Which gas in air takes part in this reaction?

  • A Hydrogen
  • B Nitrogen
  • C Oxygen
  • D Carbon dioxide

Question - 6

In which of the following is ethanol used?

  • A Tincture iodine
  • B Cough syrup
  • C Alcoholic drinks
  • D All of the above

Question - 7

Which of the followinq is a part in the homologous series?

  • A Haloalkanes and alcohols
  • B Aldehydes and ketones
  • C Carboxylic acids
  • D All of the above

Question - 8

Identify the product formed when ethanoic acid reacts with carbonates and bicarbonates apart from water and carbondioxide

  • A Sodium acetate
  • B Ethane
  • C Hydrogen peroxide
  • D Acetic acid

Question - 9

Which of the following is an allotrope of carbon?

  • A C12
  • B C14
  • C C60
  • D C72

Question - 10

When carboxylic acid is treated with NaHCO3, brisk effervescence is seen. Which gas is evolved?

  • A Oxygen gas
  • B Carbon dioxide gas
  • C Hydrogen gas
  • D Ammonia gas.