Assertion (A): In expensive scientific instruments, silica gel is kept in watch-glasses or in semipe

Question

Assertion (A): In expensive scientific instruments, silica gel is kept in watch-glasses or in semipermeable membrane bags. 
Reason (R): Silica gel adsorbs moisture from air via adsorption, thus protects the instrument from water corrosion (rusting) and / or prevents malfunctioning.

Professor PC Thomas Classes · Answer

Silica gel acts as a strong adsorbent for moisture, lowering humidity and preventing corrosion, fully explaining the assertion.