When hydrogen gas is passed over heated copper (II) oxide, copper and steam are formed. Write the balanced chemical equation for this reaction and state (i) the substance oxidized and (ii) the substance reduced in the reaction.

When hydrogen is passed over copper oxide. copper and steam are formed. Write a balanced chemical equation for this reaction and state which of the chemicals are non-metals.

When hydrogen gas is passed over heated copper oxide ,copper and steam are formed. Write the balanced chemical equation with physical states. State what kind of chemical reaction is this.

When Hydrogen gas is passed over heated copper (II) oxide, copper and steam are formed. Write the balanced chemical equation with physical states for this reaction. State what kind of chemical reaction is this?

(a) When sodium is brunt in chlorine, sodium chloride is formed, and when molten sodium chloride is electrolysed, then sodium and chorine are formed. What type of reaction takes place: (i) in the first case ? (ii) in the second case ? (b) When hydrogen is prossed over heated copper oxide, copper and stem are formed. write a balanced chemical equation for this reaction. state which of the chemicals is oxidised and which is reduced ? (c) what would you observe when zinc is added to a solution of iron sulphate ? write the chemical equation of the reaction which takes place. why does this reaction occur?

What is an oxidation reaction (i) the substance oxidised and (ii) the substance reduced: ZnO+ C to Zn + CO

Write balanced chemical equation only for the reaction of hydrogen with lead oxide

Hydrogen gas is passed over black copper oxide. Give balanced reaction.

(a) Example the folloeing in terms of gain or loss of oxygen with one example each : (b) When copper powder is heated strongly in air, it forms copper oxide. Write a balanced chemical equation for this reaction. Name (i) substance oxidised, and (ii) substance reduced.

Name a gas which reduces hot copper (II) oxide to copper.