Science & Technology MCQs - 2026-04-07

Finding planets in habitable zones helps scientists assess the conditions under which life might arise and understand how common potentially life-supporting planets are in the universe.

NASA's Transiting Exoplanet Survey Satellite (TESS) is designed to discover exoplanets by observing the slight dimming of a star when a planet passes in front of it (transits).

TOI-700 e is described as a 'Super-Earth', indicating it is larger than Earth but smaller than ice giants like Neptune.

The habitable zone, also known as the 'Goldilocks zone', is the range of orbital distances from a star where a planet could potentially have liquid water on its surface, a key ingredient for life as we know it.

An exoplanet is a planet that orbits a star other than our Sun.

By exploring and adopting green hydrogen technology, India is actively working towards reducing its carbon footprint and meeting its national and international climate change commitments.

Green hydrogen is particularly promising for heavy-duty transport because it offers higher energy density and faster refueling times compared to battery-electric solutions, which are more suitable for lighter vehicles.

The pilot project is designed to evaluate how well the hydrogen buses perform in real-world conditions, their energy efficiency, and what infrastructure (like hydrogen refueling stations) is required for wider adoption.

Hydrogen fuel cells combine hydrogen and oxygen to produce electricity, with water vapor being the only emission, making them a zero-emission technology.

Green hydrogen is produced by splitting water molecules (electrolysis) using electricity generated from renewable sources like solar or wind power, making its production process emission-free.