Monday, August 10, 2020

G2013 Q1

The number of hydrous minerals in the Moh's scale of hardness is __________.

The hydrous minerals in the Moh’s scale of hardness are

Talc                Mg3Si4O10(OH)2

Gypsum         CaSO4.2H2O

Apatite           CaS(PO4)3(F1Cl1OH)

Topaz             Al2SiO4(F1OH)2






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G2013 Q2

  It takes approximately ______ minutes for sunlight to reach the Earth. We know that, Earth-Sun distance = 1.496 x 108m Velocity of light r...