New RBI Grade B 2025 Notification will come Soon! Enroll Here

    Question

    What is the primary reason for the non-expanding nature

    of fine-grained micas within the 2:1-type minerals?
    A Presence of potassium ions Correct Answer Incorrect Answer
    B Larger crystal size Correct Answer Incorrect Answer
    C Octahedral sheet dominance Correct Answer Incorrect Answer
    D Water adsorption Correct Answer Incorrect Answer
    E Strong hydrogen bonding Correct Answer Incorrect Answer

    Solution

    Potassium ions act as binding agents, preventing the expansion of the crystal structure, thus making fine-grained micas non-expanding .

    Practice Next