What is the standard form for 1 nanometre?1 × 10-8 m0.1 × 10-8 m0.1 × 10-9 m1 × 10-9 m2What size are nanoparticles?100-1000 nmMore than 1000 nmLess than 1 nm1-100 nm3Why are only very small amounts of nanoparticles required in industry compared with other molecules?Because they are unreactiveBecause they have a very large surface area to volume ratioBecause they have a very small surface area to volume ratioBecause they are highly flammable4Why do some people have concerns about the use of nanoparticles in sunscreens?They are flammableThey may not be very effectiveThey may enter the bloodstream with unpredictable resultsThey are very expensive

What is the typical size range of nanoparticles?a) 1 to 100 millimetersb) 1 to 100 micrometersc) 1 to 100 nanometersd) 1 to 100 picometers

The size of colloids is :  1 point1 to 10000 nm10 to 100 nm1 to 1000 nm1 to 100 nm

Nanomaterials have large fraction of surface atoms.

Which of the following statements are correct in the case of nanomaterials1. They have a large surface area2. They have large imperfections compared to their counter parts3. They are used in Fuel Cells4. They have large fraction of surface atoms*1 point1, 2, 4 are correct1, 2, 3 are correct2, 3, 4 are correct

Nanotechnology is science, engineering and technology conducted at the nanoscale, 1 to 1,000 nanometers, Group of answer choicesTrueFalse