Senior One Quiz No.5 (Nano Part 2 )

Nano pollution refers to the pollution caused by very small particles, typically with a size of less than 100 nanometers. These particles can come from various sources such as vehicle exhaust, industrial emissions, and burning of fossil fuels. Nano pollution is a growing concern as these tiny particles can easily enter the human body through inhalation and cause adverse health effects. It can also have detrimental effects on the environment, including air quality and ecosystem balance. Therefore, the correct answer is Nano pollution.

Nano silicon is the correct answer because it refers to the use of silicon at the nanoscale level. By reducing the size of silicon particles to the nanoscale, the surface area increases, allowing for more efficient absorption of sunlight and conversion of energy. This increased surface area also enhances the electrical conductivity of the solar cells, resulting in improved performance and higher energy conversion efficiency compared to normal silicon. Using nano silicon in solar cells can therefore enhance their ability to convert energy from sunlight.

Nano fibers can help in solving problems related to impurities in drinking water. Nano fibers have a high surface area to volume ratio, which allows them to effectively filter out contaminants and impurities from water. They can trap particles, bacteria, and other pollutants, ensuring cleaner and safer drinking water. Nano fibers also have a strong mechanical strength and chemical stability, making them durable and effective in water filtration systems. Therefore, the use of nano fibers can be a viable solution to address the impurities in drinking water in certain places.

The correct answer is 1D because nano filters are made using one-dimensional nano materials. One-dimensional nano materials refer to materials that have a nanoscale dimension in one direction, such as nanowires or nanotubes. These materials are used to create filters with extremely small pore sizes, allowing them to effectively remove contaminants at the nanoscale level.

Nano is the least quantity because it is the smallest unit of measurement among the given options. Mili is larger than micro, which is larger than nano. Therefore, nano is the smallest quantity.