Answer to Question #71670 in Inorganic Chemistry for u m e

Question #71670
Question 16 : Although diamond occur in nature but it can be obtained artificially by __________.
By boiling and quick quenching of carbon, silicon and germanium
By boiling and quick quenching of carbon and silicon
Subjecting carbon to high temperature and pressure
Subjecting silicon to high temperature and pressure

Question 17 : _______ is formed when petroleum gases or natural gas is burnt in a limited supply of air.
Coke
Carbon black
Charcoal
Silicon oxide

Question 18 : ________ is used to strenghten rubber, as a pigment in inks, paints, paper and plastics.
Carbon black
Lead
Coke
Graphite
1
Expert's answer
2017-12-10T06:54:07-0500
Question 16: Subjecting carbon to high temperature and pressure(HPHT - High Pressure High Temperature)
Question 17: Carbon black
Question 18: Lead (Pb(OH)2•PbCO3 ; PbCrO4 )

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