Physical and Ch...

Your lab partner mixed two colorless solutions in the test tube. He sees no observable changes in the resulting mixture and is unable to detect any temperature change. Based on these observations, what type of change has taken place?

Which of the following is an example of a physical change?

What kind of change is undergone when an electric bulb glows?

What conditions are required for rusting to take place?

Rusting can be prevented by:

Take some clean iron nails and place them in the three test tubes prepared as under:

Test tube A: Contains boiled water and a thin layer of oil.

Test tube B: Contains dry air.

Test tune C: Testube half-filled with water. 

All the test tubes are tightly closed after placing the nails. After some time what will you observe?

What are the different conditions for a chemical reaction to take place?

What type of protection is galvanising?

While forming crystals, it is important to :

Which of the following is true?