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99 Percentile Qs Bank for JEE MainChemistryp Block Elements (Group 15, 16, 17 & 18)

Which of the following pair of gases is used to prepare Holme's signals?

Options

  1. APhosphine and acetylene.
  2. BPhosphine and ethylene.
  3. CAmmonia and acetylene.
  4. DPhosphine and ammonia.

Correct answer

A. Phosphine and acetylene.

Step-by-step solution

Phosphine and acetylene Holmes signal are the containers containing calcium carbide and calcium phosphide gas. These two gases are pierced in a container and thrown in water. Then, they produce gases PH 3 and C 2 H 2 , which burn and it is served as a signal.

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