Talc, $M g_{3} S i_{4} O_{10} (O H)_{2}$ is the softest material. It has a smooth, greasy touch. It is used in talcum powder. Muscovite, $K A l_{2} (S i_{3} A l) O_{10} (O H)_{2}$ , is one of the micas which split into thin layers extremely easily. Both minerals have layer structures. If Vander Waal's forces holds the layers together then enter 1, else enter 0.

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Solution

Talc, $M g_{3} S i_{4} O_{10} (O H)_{2}$ is the softest material. It has a smooth, greasy touch. It is used in talcum powder. Muscovite, $K A l_{2} (S i_{3} A l) O_{10} (O H)_{2}$ , is one of the micas, which split into thin layers extremely easily. Both minerals have layer structures and the Vander Waal's forces holds the layers together.
Hence, option 1 is correct.

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