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Question

Question: Mark the example which is not correct....

Mark the example which is not correct.

A

Non – combustible heavy lifquid used as fire extinguisher - CCl4\mathrm { CCl } _ { 4 }

B

Blocks used to shield radioactive materials – Lead

C

Element which has property of leaving mark on paper – Graphite.

D

A gas is solid form as a refrigerant- carbon monoxide.

Answer

A gas is solid form as a refrigerant- carbon monoxide.

Explanation

Solution

: Solid CO2\mathrm { CO } _ { 2 } is used as refrigerant.