81.

Who is the founder of 'Facebook' which is currently the No.1 social networking website in India?

• Martin Cooper

• Orkut Buyukkokten

• Mark Zuckerberg

• Bill Gates

In programming, repeating some statements is usually called

• structure

• looping

• control structure

• compiling

Silicon is a polymer of 

• silicon tetrachloride

• dialkyl dichlorosilane

• silane

• tetraalkyl silane

Which is a natural colloid?

• Urea

• Cane-sugar

• Blood

• Sodium chloride

Which one of the following does not contain silver?

• Lunar caustic

• German silver

• Horn silver

• Ruby silver

The presence of cobalt in vitamin B₁₂ was established for the first time by

• spectroscopy

• borax-Bead test

• sodium nitroprusside test

• hydrolysis test

Which bacterial strain developed from natural isolates by genetic manipulations can be used for treating oil spills?

• Agrobacterium

• Clostridium

• Nitrosomonas

• Pseudomonas

Coating of solid waste with impervious material is known as

• chemical fixation

• landfill

• capping

• encapsulation

Ultraviolet rays can be used in water treatment as

• precipitator

• hydrolyser

• disinfectant

• flocculator

Thiamidine dimer formation in DNA is caused by

• X-rays

• β and γ-rays

• UV-rays

• IR-rays