Electrolysis — Chemistry STD 10 — Question

Explain with reason:
Roasting is carried out on sulphide ores and not on carbonate ores?

Using ammonium hydroxide, how would you distinguish between the following pair of ions in solution?
Ferrous ion and Ferric ion.

What is observed when dilute hydrochloric acid is added to silver nitrate solution. Write the equation involved.

State four periodic properties which are responsible for the formation of covalent compounds.

Solution A is a strong acid.
Solution B is a weak acid.
Solution C is a strong alkali.
(i) Which solution contains solute molecules in addition to water molecules?
(ii) Which solution will give a gelatinous white precipitate with zinc sulphate solution? The precipitate disappears when an excess of the solution is added.
(iii) Which solution could be a solution of glacial acetic acid?
(iv) Give an example of a solution which is a weak alkali.

Draw the structural formula of a compound with two carbon atoms in each of the following cases:
(a) An alkane with a carbon to carbon single bond.
(b) An alcohol containing two carbon atoms.

Ethylene forms and addition product with chlorine. name this addition product and write its structural formula.