Question:
Which one of the following statements regarding helium is not true ?
Which one of the following statements regarding helium is not true ?
Updated On: Jul 7, 2022
- It is used to produce and sustain powerful super conducting magnets
- It is used in gas cooled nuclear reactors
- It is used to fill gas balloons instead of hydrogen because it is lighter and non inflammable
- It is used as a cryogenic agent for carryingout experiments at low temperature
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The Correct Option is C
Solution and Explanation
He is twice as heavy as hydrogen, its lifting power is 92% of that of hydrogen. He has the lowest melting point of any element which makes liquid helium an ideal oolant for many extremely low temperature applications based on super conducting magnet and cryogenic research where temperature close to absolute zero are needed
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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:
- Group 13 Elements: Boron family
- Group 14 Elements: Carbon family
- Group 15 Elements: Nitrogen family
- Group 16 Elements: Oxygen family
- Group 17 Elements: Fluorine family
- Group 18 Elements: Neon family