mani you yourself have got many answers of yours wrong.............dont mind but u should have consulted a book before posting.......
1. computers cannot classify information.
2. vinegar is the other name of acetic acid so its not an alkali the right answer is infact slaked lime
3. the temperature of liquid nitrogen is -196
4. boiling of an egg is a chemical change as u can bring the hard egg into its previous form by manipulation.
5. gases do conduct heat, whereas its a vaccum that doesnot conduct heat.
6. the density of water is greatest at 4 c.

if u dont agrreee with me do consult some one or a book.