Chemical Process
Polymerisation product of C₂F4 (carbon tetraflouride) is called P.T.F.E (poly chloro tetra flouro ethylene). It is also called

Epoxy resin
Silicone
Teflon
Polyurethane

ANSWER DOWNLOAD EXAMIANS APP

Chemical Process
Pick out the true statement pertaining to water treatment.

Normally, the turbidity is removed by adding a coagulent prior to sedimentation
Application of activated carbon reduces the temporary hardness of water
Slow sand filters can remove colour completely
Activated carbon can be used for taste & odour control without subsequent filtration

ANSWER DOWNLOAD EXAMIANS APP

Chemical Process
Fluorescent dyes are added in detergents to

Act as fabric brightener (by converting ultraviolet light to visible light) thereby improving the whiteness appearance of white fabrics
Act as tarnish inhibitor for metals like German silver
None of these
Attain distinctiveness from other brands

ANSWER DOWNLOAD EXAMIANS APP