Molecular mass of Ca(OH)2 is:

Explanation:

Molecular mass of Ca(OH)₂ = Atomic mass of Ca + 2 × Atomic mass of O +  2 × Atomic mass of H

Atomic mass of Ca = 40 u

Atomic mass of O = 16 u

Atomic mass of H = 1 u

Molecular mass of Ca(OH)₂  = 40 + 2 × 16 + 2 × 1=74u

Final Answer:

Hence the correct answer is (C) 74.