Can Q and S, both be metals. Justify your answer.

What is observed when:-
Neutral litmus solution is added to sodium hydrogen carbonate solution.

Acid dissolves in water to produce positively charged ions. Draw the structure of these positive ions.

What is observed when:-
Hydrogen sulphide gas is passed through Lead acetate solution

Dilute Nitric acid is generally considered a typical  acid except for its reaction with metals. In what way is dilute Nitric acid different from other acids when it reacts with metals?

Explain why carbon tetrachloride does not dissolve in water.

Write the equations for the following laboratory proparations:-
Methanol from Iodomethane

Electrons are getting added to an element Y.

I) Is Y getting oxidized or reduced?

II) What charge will Y have after the adition of electrons?

III) Which electrode will Y migrate to during the process of electrolysis?

What is observed when:-
A small piece of iron is placed in copper sulphate solution.

The prepartion of Lead sulphate from Lead carbonate is a two steps process. 
(Lead sulphate cannot be prepared by adding dilute Sulphuric acid to Lead Carbonate.)

i) What is the first step that is required to prepare Lead sulphate from Lead carbonate?

ii) Write the equation for the reaction that will take place when this first step is carried out.

iii) Why is the direct addition of dilute sulphuric acid to Lead carbonate an impractical method of preparing lead sulphate.