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Q40 (CDS-II/2022) Science & Technology › Space & Defence Technology › Space astronomy missions Answer Verified

The atmosphere of Planet Venus is made up of thick and yellowish clouds of

Result
Your answer: —  Â·  Correct: B
Explanation

The atmosphere of Venus is the densest among the terrestrial planets and is primarily composed of carbon dioxide [1]. It is characterized by a thick, permanent layer of clouds that totally obscure the planet's surface [1]. These clouds are composed of droplets of concentrated sulfuric acid (H2SO4) [1]. The sulfuric acid is formed through chemical reactions involving sulfur dioxide (SO2) and water vapor (H2O), often triggered by photo-oxidation from solar ultraviolet radiation. These clouds are highly reflective, contributing to the planet's high albedo and intense greenhouse effect [1]. While traces of other substances like nitrogen and water vapor exist, the defining chemical component of the visible, yellowish cloud deck is sulfuric acid.

Sources

  1. [1] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 2: The Solar System > Venus > p. 28
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