The question asks to identify the hardest known natural mineral. This requires knowledge of mineral hardness, often measured by the Mohs scale of mineral hardness.
Correct Option: B) Diamond is the hardest known natural mineral, scoring 10 on the Mohs scale of mineral hardness.
The question asks for the hardness of Talc on the Mohs Hardness Scale. This requires knowledge of the Mohs scale and the specific hardness values assigned to common minerals.
C) 1 — Talc is the softest mineral on the Mohs Hardness Scale and is assigned a value of 1.
The question asks about the range of the Mohs Hardness Scale. This is a standard scale used in mineralogy to measure the scratch resistance of various minerals. Knowing the specific range of this scale is key to answering the question.
Correct Option: C) 1 to 10
The Mohs Hardness Scale ranges from 1 (talc) to 10 (diamond), representing the relative scratch hardness of minerals.
The question asks to identify the mineral group that is the largest and forms the backbone of most rocks. This requires knowledge of common mineral classifications and their abundance in the Earth's crust.
Correct Option: D) Silicates — Silicate minerals are by far the most abundant mineral group in the Earth's crust, making up over 90% of its mass. They are the primary rock-forming minerals, forming the backbone of igneous, metamorphic, and sedimentary rocks. Their fundamental building block is the silicon-oxygen tetrahedron (\(\text{SiO}_4^{4-}\)).
The question asks about the composition of ferrous metallic minerals. This requires knowledge of mineral classification, specifically distinguishing between ferrous and non-ferrous metals.
C) Iron and metals often mixed with iron to form various kinds of steel. This option correctly defines ferrous metallic minerals as those containing iron, which is then often alloyed with other elements to produce steel.
The question asks to identify a group of non-ferrous metallic minerals. To answer this, we need to understand the classification of minerals, specifically distinguishing between ferrous and non-ferrous metals, and also between metallic and non-metallic minerals.
Correct Option: C) Copper, lead, zinc, tin, aluminium