P Block Elements Question 306
Question: Which one of the following statements regarding helium is incorrect
[AIEEE 2004]
Options:
A) It is used to produce and sustain powerful superconducting magnets
B) It is used as a cryogenic agent for carrying out experiments at low temperatures
C) It is used to fill gas balloons instead of hydrogen because it is heavier and non-inflammable
D) It is used in gas-cooled nuclear reactors
Show Answer
Answer:
Correct Answer: C
Solution:
Helium is about 7 times heavier than hydrogen, its lifting power is 92% of that of hydrogen. Helium has the lowest boiling point of any element, which makes liquid helium an ideal coolant for many extremely low temperature applications such as superconducting magnets and cryogenic research where temperatures close to absolute zero are needed.
BETA
