Q. On Moh's scale, materials with hardness number less than 4 are (Solved)
1. Topaz, Corundum, Diamond
2. Hardened and tempered
3. Felspar, corundum, Diamond
4. Fluorite, Felsper, Talc
5. Talc, gypsum, calcite
- e. Talc, gypsum, calcite
1. Topaz, Corundum, Diamond
2. Hardened and tempered
3. Felspar, corundum, Diamond
4. Fluorite, Felsper, Talc
5. Talc, gypsum, calcite