Which of the Following Statements About Helium Is Inconsistent with Its

question 222

Multiple Choice

Which of the following statements about helium is inconsistent with its chemistry?

• A)A helium oxygen mixture is used as a deep-sea diving gas instead of compressed air.
• B)In its liquid form it is used as a cryogenic coolant for superconductors.
• C)It is one of the more reactive elements of its group.
• D)Its melting point is -272.2°C and its boiling point is -268.9°C.

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Definitions:

Low-Viscosity

Describes a fluid that easily flows because it has a low resistance to deformation.

Pyroclastic Flow

A fast-moving current of hot gas and volcanic materials that flows down the side of a volcano during an explosive eruption, capable of destroying everything in its path.

Volcanic Breccia

A coarse-grained volcanic rock composed of angular fragments of volcanic material cemented together by finer particles or a mineral matrix.

Dome Collapse

The falling in of the roof of a volcanic dome due to gravitational failure, often leading to pyroclastic flows.