Question : The chemical formula of borax is
Option 1: Na2B5 O7 .10H2O
Option 2: Na2B4O7.10H2O
Option 3: Na2B4O7.5H2O
Option 4: Na2B4O7.12H2O
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Correct Answer: Na2B4O7.10H2O
Solution : The correct answer is Na2B4O7.10H2O.
The chemical formula of Borax is Na2B4O7·10H2O. It consists of two sodium (Na) atoms, four boron (B) atoms, seven oxygen (O) atoms, and ten water (H2O) molecules.
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Question : The chemical formula of gypsum is ______.
Option 1: CaSO4.2H2O
Option 2: CaSO4.H2O
Option 3: CaSO4
Option 4: CaSO4.(1/2)H2O
Question : The chemical formula of washing soda is ______.
Option 1: Na2CO3.10H2O
Option 2: Na2SO4
Option 3: NaOH
Option 4: NaHCO3
Question : The chemical formula of Gypsum is _________.
Option 1: CaSO4.12H2O
Option 2: MgSO4.12H2O
Option 3: MgSO4.2H2O
Option 4: CaSO4.2H2O
Question : What is the total surface area of a cone, if the slant height and radius of a cone are 30 cm and 14 cm, respectively?
Option 1: 1980 cm2
Option 2: 1963 cm2
Option 3: 1908 cm2
Option 4: 1936 cm³
Question : The term of a Governor is
Option 1:
4 years
Option 2:
5 years
Option 3:
6 years
Option 4: 3 years
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