Science & Technology MCQs - 2026-07-25

Multiple Indian institutions, including ISRO, DRDO, and TIFR, are actively engaged in various aspects of quantum communication research and development, contributing to India's advancements in this field.

Quantum states are extremely fragile and susceptible to environmental noise, leading to decoherence. This loss of quantum information over distance is a major hurdle for establishing robust, long-distance quantum communication networks.

Quantum entanglement, where two or more particles become linked and share the same fate regardless of the distance separating them, is crucial for QKD. Any attempt to eavesdrop on the entangled particles disturbs their state, alerting the communicating parties.

The Gaganyaan mission is designed to carry a crew of three astronauts into space for a mission duration of up to seven days.

The Gaganyaan mission's primary focus is on human spaceflight within Earth's orbit. Establishing a permanent lunar base is a long-term goal for space exploration but not a direct objective of the Gaganyaan program itself.

The Vikas engine, in its cryogenic configuration, is designed to power the upper stages of the launch vehicle, providing the necessary thrust for achieving orbital velocity after the initial stages have been completed.