Which institute developed the machine learning aided filter for treating dye contaminated wastewater?

The correct answer is turmeric extract. The nanoparticles were synthesised in the laboratory of Aviru Kumar Basu using an extract of turmeric, in which naturally occurring compounds such as curcumin, flavonoids and phenolic compounds worked as the reducing and stabilising agents. This green route matters because it avoids the harmful reagents that conventional synthesis of nanoparticles depends on, so the material itself is made in an environment friendly way before it is used to clean water. The other options name plant materials that are often used in green synthesis research in general but were not the source here, which makes them plausible yet incorrect. Candidates should remember the pairing of turmeric with zinc oxide and curcumin's role as a reducing agent in this experiment.

The correct answer is 98.6 per cent in 120 minutes. Under light and ultrasonic excitation applied together, the membrane of polylactic acid and zinc oxide removed the colour of 98.6 per cent of methylene blue in that time. Option C gives the figure for the other dye tested, congo red, which lost 96.7 per cent of its colour in the same period, so it is a close but wrong choice. Options A and B are wrong because those percentages belong to the antibacterial results: the material inactivated about 75 per cent of E. coli and 71 per cent of S. aureus after 6 hours of contact. Keeping the dye results and the germ killing results apart is important, since a paper setter will often swap one figure for the other in the options.

The correct answer is photocatalysis and piezocatalysis. The filter breaks down dyes using light and mechanical vibration at the same time. The vibrations create a piezoelectric polarisation in the material, which holds back the recombination of the electrons and holes generated by light and therefore raises the formation of reactive species that attack dye molecules. Options A and C are wrong because adsorption, flocculation, sedimentation and biological treatment are older approaches: the first group separates pollutants without necessarily destroying them, and biological treatment is slow for highly stable dyes. Option D names processes that were not part of this study. Remember also that putting the catalyst inside an electrospun membrane solves the practical problem of recovering nanoparticle catalysts from treated water.

The correct answer is the Department of Administrative Reforms and Public Grievances. The National Centre for Good Governance works under this department and organises the Capacity Building Programme on Urban Service Delivery for Civil Servants of Multiple Countries, held at Mussoorie from 12 to 23 October 2026. The course is sponsored by the Ministry of External Affairs and forms part of India's international capacity building effort under the Indian Technical and Economic Cooperation Programme. Officials taking part come from countries including Peru, Cambodia, Nigeria, Kenya, Palestine, Lebanon, The Gambia, Ecuador and Spain. Option B handles civil service personnel matters but is not named as the organiser here, while option C deals with industry and trade promotion and option D with public expenditure, neither of which runs this programme. Keep the chain in mind: NCGG, DARPG, MEA sponsorship and the ITEC framework.

The correct answer is 2,353. BHASHINI, which serves as India's Language Digital Public Infrastructure, has had its language technologies built into that many government platforms, and these include more than 800 government websites, so option D names only the websites and not the full count of platforms. Options A and C are not the reported figures. The platform supports 36 Indian languages in text, 23 Indian languages in voice and 35 international languages, and it has delivered more than 9 billion cumulative artificial intelligence inferences, with the daily count running above 24 million. These numbers explain why the division was able to supply live translation at a training course for officials from several countries. Remember the set together: 2,353 platforms, over 800 websites, 36 languages in text and 23 in voice.