The use of sulphur to vulcanize rubber is mad to make it<...
The use of sulphur to vulcanize rubber is mad to make it
blacker
cheaper
more elastic
tougher
softer
Correct answer is D
No explanation has been provided for this answer.
The gas given off when ethanol reacts with sodium is ...
35 cm3 of hydrogen was sparked with 12 cm3 of oxygen at 110°C and 760mm Hg to produce steam. Wha...
The process that occurs when two equivalent forms of a compound are in equilibrium is ...
The species with no electron in the 3d-orbital is ...
The negatively charged particle in an atom is the ...