B2_EC B-group

Single graphene sheet is nearly transparent because,

• extreme thinness

• extreme thickness

• the material strongly absorbs light of all visible wavelengths

• none of these

Graphite sheets are nearly black in color because,

• extreme thinness

• extreme thickness

• the material strongly absorbs light of all visible wavelengths,

• none of these

Single graphene sheet is nearly,

• blue in color

• red in color

• transparent

• black

From the following the synthetic polymer is,

• Cellulose

• DNA

• Neoprene

• Isoprene

By adding chromium to iron which of the following property is enhanced?

• Resistance to corrosion

• Electrical conductance

• Magnetic property

• Ductility

Duralumin is an alloy of,

• Aluminum and Copper

• Aluminum and iron

• Aluminum and mercury

• Aluminum and Carbon

The polymerization of glycol and diisocyanate generate the polymer…….

• Phenol-formaldehyde

• Novolak

• Poly-urethane

• Bakelite

Graphite is,

• three-dimensional material

• two-dimensional material

• one-dimensional material

• none of these

Graphite sheets are nearly,

• blue in color

• red in color

• transparent

• black in color

The polymerization of phenol and formaldehyde generate the polymer…….

• Urea-formaldehyde

• Nylon 6,6

• Kevlar

• Bakelite