Practical Work — Chemistry STD 10 — Question

With reference to the reduction of copper (II) oxide , iron (II) oxide, lead (II) oxide and magnesium oxide; place the oxides in order of increasing ease of reduction.[i.e. first write the oxide that is most difficult to reduce and at last, the oxide, that is most easily reduced.]

The electrons present in the outermost shell of an atom.

The law that groups elements in family of three.

Name the following:
A toxic alcohol

Give one example in the following case:
a hydroxide which is insoluble in water.

Calcium carbide and water.

Identify the anion present of the following compound:
When barium chloride solution is added to salt solution E a white precipitate insoluble in dilute hydrochloric acid is obtained

Name the substance used for drying ammonia.

Ethyne is more reactive than ethane.