SSC
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Granite is an igneous rock that contains the minerals quartz, feldspar, mica and others. The exact composition will vary from sample to sample. Granite is a(n) ____
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element
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compound
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heterogeneous mixture
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homogenous mixture/solution
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Explanation:
Detailed explanation-1: -Granite is an igneous rock that is composed of four minerals. These minerals are quartz, feldspar, mica, and usually hornblende. Granite forms as magma cools far under the earth’s surface. Because it hardens deep underground it cools very slowly.
Detailed explanation-2: -The chemical composition of granite is typically 70-77% silica, 11-13% alumina, 3-5% potassium oxide, 3-5% soda, 1% lime, 2-3% total iron, and less than 1% magnesia and titania. Volcanic rock of equivalent chemical composition and mineralogy is called rhyolite.
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