CBSE Class 10 - Science Quiz (2020)
Q1: The shiny finish of wall after white wash is because of
(a) CaO
(b) Ca(OH)₂
(c) CaCO₃
(d) Ca₃(PO₄)₂
Q2: Chemical formula for baking soda is:
(a) NaHCO₃
(b) Na₂CO₃
(c) CaCO₃
(d) Mg(OH)₂
Q3: Green colour coating on copper utensils due to atmospheric corrosion is due to the formation of