EC B2 D-group

From the following the synthetic polymer is,

• Cellulose

• DNA

• Neoprene

• Isoprene

Corrosion is a reverse process of metal,

• A. Destruction

• B. Extraction

• C. Rusting

• D. Galvanizing

Graphene oxide can be synthesized by using,

• A. modified Hummers method

• B. Aldol condensation method

• C. grinding of graphite

• D. none of these

Major constituents of Nichrome are ---------

• A. Nickel

• B. Chromium

• C. Copper

• D. Tin

Reddish scale of iron oxide has molecular formula,

• IrO2

• FeCl3

• Fe3O4

• FeSO4

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

• Phenol-formaldehyde

• Novolak

• Poly-urethane

• Bakelite

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

• Urea-formaldehyde

• Nylon 6,6

• Kevlar

• Bakelite

Destruction (Corrosion) of metal starts ,

• A. At the surface

• B. Just on layer below from surface

• C. In the middle

• D. At the bottom

Heating borazine at 70 °C expels hydrogen with formation of,

• A. benzene

• B. borazole

• C. polyborazylene

• D. piezoelectric materials

Borazine can be synthesized by,

• A. treating diborane and ammonia in a 1 as 2 ratio at 250-300 °C

• B. treating Benzene and ammonia in a 1 as 2 ratio

• C. treating diborane and benzene in a 1 as 2 ratio

• D. none of these