Solved NDA Question
A solved NDA PYQ - decoded step-by-step.
Solve it the standard way once - then learn the shortcut.
Q · Rocks and Rock CyclesMedium · 45s
Which of these rocks is glassy in texture due to rapid cooling?
TopicRocks and Rock Cycles
Question Typemultiple choice
DifficultyMedium
Marking+1 / −0.25
Test Duration30 min
Step-by-Step Solution
The complete worked solution.
Every step explained - no skipped algebra.
Obsidian cools so quickly that crystals do not form, giving a glassy texture.
Final Answer: Option A - Obsidian