Question:

Helium is used in balloons in place of hydrogen because it is

Updated On: Jun 15, 2024
  • incombustible
  • lighter than hydrogen
  • radioactive
  • more abundant than hydrogen
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The Correct Option is A

Solution and Explanation

Helium (He) is a non-flammable (incombustible) gas and its lifting power is $93 \%$ as compared to flammable hydrogen gas, due to these reasons it is used in filling balloons and other lighter air-crafts.
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Top Questions on p -Block Elements

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Concepts Used:

P-Block Elements

  • P block elements are those in which the last electron enters any of the three p-orbitals of their respective shells. Since a p-subshell has three degenerate p-orbitals each of which can accommodate two electrons, therefore in all there are six groups of p-block elements.
  • P block elements are shiny and usually a good conductor of electricity and heat as they have a tendency to lose an electron. You will find some amazing properties of elements in a P-block element like gallium. It’s a metal that can melt in the palm of your hand. Silicon is also one of the most important metalloids of the p-block group as it is an important component of glass.

P block elements consist of: