Organic Chemistry — Chemistry STD 10 — Question

Explain the following :
zinc is used to cover iron so as to prevent rusting of iron. why?

Explain the following:
(a) Almost 90% of all known compounds are organic in nature.
(b) It is dangerous to burn methane in an insufficient supply of air.

Electron affinities of two elements A and B are given below:
A = 3.79 electron volts
B = 3.56 electron volts
Which of them will ionize more easily and why?

An important industrial reaction is represented by the equation 2SO₂ + O₂ → 2SO₃. The formation of sulphur trioxide is exothermic. State the conditions of temperature and state the name of the catalyst required for the above reaction to take place.

Under what conditions does ethane get converted to acetaldehyde .

Write the equation for the reaction of dilute nitric acid and conc. nitric acid with copper.

State two relevant observation of the following:
Ammonium hydroxide solution is added to zinc nitrate solution in minimum quantities and then in excess

How would you separate gold from a mixture of gold and copper filling?

By drawing the dot diagram, show the lone pair effect leading to the formation of hydronium ion from water and hydrogen ion.