Ans: B

Exp:

Statement 1 is correct:. Numerous nanotechnology goods are unreliable in terms of their composition, size, or shape. This ambiguity increases the possibility of environmental toxicological contamination. Because they are so tiny, nanoparticles can easily enter living cells. The human body is built to recognize foreign items and to develop phagocytes that will digest them. However, phagocytes in the body cannot destroy bacteria or other detritus if they are continuously digesting nanoparticles. Thus, it will decrease the immunity of the person.

Statement 2 is incorrect: Fullerenes or carbon-60 are non-biodegradable nanomaterials. They are molecular spheres of carbon which have been used in products like industrial lubricants and sports equipment. Fishes have been proven to suffer brain damage from fullerenes, and lung damage akin to that brought on by asbestos has been found in humans breathing in fullerene-contaminated air.

Statement 3 is correct:  According to experts, the exhaust from cars and manganese oxide from building sites expose individuals to significant levels of nano pollution in metropolitan areas, and scientists are working hard to identify and categorize the toxicity of these pollutants.

Ans: B

Exp:

Statement 1 is incorrect: The International Conference on Nano Science and Technology, or ICONSAT, is a series of biennial international conferences held in India under the auspices of the Nano Mission, Department of Science and Technology, Government of India. ICONSAT offers a global forum for interactions between eminent scientists to highlight the most recent developments in the field of nanoscience.

Statement 2 is correct: The Conference welcomes a number of speakers from the academic community, business community, and young entrepreneurs from all around the world. Additionally, it seeks to give young researchers and students from home and abroad a platform where they can stay up with advancements in the rapidly developing fields of nanoscience and nanotechnology.

Ans: D

Exp:

Indian Farmers Fertilizer Cooperative Limited (IFFCO) Nano DAP is a cutting-edge agricultural input based on nanotechnology that gives plants nitrogen and phosphorus. In order to practise smart agriculture and prevent climate change, farmers can use nano DAP. The introduction of IFFCO’s liquid DAP nano is a significant first step in achieving India’s fertiliser independence.

Ans: A

Exp:

Plasmonic semiconductor nanomaterials (PSN) are metal-like materials with free electrons on the surface that oscillate collectively when hit by light. It uses solar light to increase the photocatalytic efficiency to degrade pollutants as well as generate renewable hydrogen. It can be utilized for hydrogen energy generation, a process which has shown high photon-to-hydrogen conversion efficiency under visible and near-infrared light.

PSN can easily absorb toxic ions like arsenic and fluoride, helping to remove water contamination.

Nanotech fibres are carbon nanotube (CNT) based fibre that looks and acts like textile thread but is able to conduct heat and electricity. It Behaves like both metal wires and strong carbon fibres. Hence, option a is incorrect.

Ans: C

Exp:

UNNATI (UNispace Nanosatellite Assembly & Training by ISRO), a training program in nanosatellite assembly and construction, is offered by the Indian Space Research Organization (ISRO), Department of Space. Foreign engineers, scientists, and government employees are eligible for training along with the domestic personnals. The program gives the participating nations the chance to improve their nanosatellite integration, testing, and assembly skills. 

During the Symposium to mark the 50th Anniversary of the First United Nations Conference on the Exploration and Peaceful Uses of Outer Space (UNISPACE+50), held in Vienna in 2018, India announced this program.

This two-month residential program has already benefited 60 participants from 33 different nations. The U.R. Rao Satellite Centre (URSC), located in Bengaluru, is where the program is presented. Hence, Option c is correct