Do the weights of the flask and its contents change during the activity ?

Do you think that a chemical reaction has taken place in the flask? Give reasons. Do the weights of the flask and its contents change during activity?

B.P. will change according to the activity

How the colour of iron rod changes during the heating?

How do the impurities change during smelting ?

What are the wastes produced during metabolic activities ?

Do animals change their habitats ?

What do you understand from this activity ?

What is the equlivalent weight of methane during its Combustion?

Write the Do.s and Don.ts during cyclones.