Atomic number of element Z is 16

(i) State the period and group to which Z belongs.

(ii) Is Z a metal or a non-metal?

(iii) State the formula of the compound between Z and hydrogen.

(iv) What kind of a compound is this?

M is a metal above hydrogen in the activity series and its oxide has the formula M₂O. This oxide when dissolved in water forms the corresponding hydroxide which is a good conductor of electricity. In the above context answer the following :

(i) What kind of combination (bond) exists between M and O?

(ii) How many electrons are there in the outermost shell of M ?

(iii) State the reaction taking place at the cathode.

(iv) Which electrode: anode or cathode is the oxidising electrode? Why?

Name the following :

(i) The property possessed by metals by which they can be beaten into sheets.

(ii) A compound added to lower the fusion temperature of electrolytic bath in the extraction of aluminium.

(iii) The ore of zinc containing its sulphide.

Give one equation each to show the following properties of sulphuric acid:

(i) Dehydrating property

(ii) Acidic nature

(iii) As a non-volatile acid