Chemistry Past Questions and Answers

What are the values of x, y and z respectively in the equation: xCu + yHNO₃ → xCu(NO₃)₂ + 4H₂O + zNO?

The iron (III) oxide impurity in bauxite can be removed by?

Which of the following does NOT contain aluminium as component?

A white solid suspected to be lead trioxonitrate (V) zinc trioxocarbonate (IV) or calcium trioxocabonate (IV) was heated strongly. Its residue which was yellow when hot and white when cold is?

Which of the following compounds would give lilac flame coloration and a white precipitate with acidified barium chloride solution?