Question

Which of the following reaction is characterised by the yellow colour

of product?

(a) Zn (s) + H2SO4 →ZnSO4 + H2

(b) Na2CO3 + H2SO4→ Na2SO4 + H2O + CO2

(c) 2Pb3O4

ℎ

>6PbO (s) + O2(g)

(d) 2KClO3

ℎ

>2KCl + 3O2(g)​

Answer 1

Answer:

B = Na2 co3 + h2so4 - na2so4 +h2o +co2

Answer 2

(c) 2Pb3O4 ->6PbO (s) + O2(g) is the reaction characterized by the yellow colour of the product.

• PbO is the chemical formula for lead monoxide or lead oxide. The precipitate of lead oxide is yellow in colour.
• ZnSo4 is the chemical formula for compound zinc sulphate. The solid is colourless.
• Na2SO4 is the chemical symbol for sodium sulphate and KCl is the chemical symbol for potassium chloride.
• Both the precipitates are white in colour.