Magnesium strip slowly tarnishes on keeping in air but metallic calcium is readily attacked by air. Explain:

Magnesium is heated in air.

Give balanced equation Aluminium and calcium burnt in air

Alkali metals tarnish in dry air because ______.

Apparatus: Test tube, glass rod, beaker, Bunsen burner, etc. Chemicals: Hydrochloric acid, ammonia solution, magnesium strip, quick lime, etc. Activity 3: Take water in a beaker up to half of its capacity. Add a few pieces of quick lime (calcium oxide, CaO) to it. What will you observe?

Air pressure in a car tyre increases during driving . Explain.

Fill in the blanks The slow process of decay or destruction of a metal due to effect of air, moisture and acids on it is known as......

If a spring balance is used to weigh a body, will the weight of the body be the same in vacuum and air ? Explain why

Veena observes that during winter setting of milk into curd takes more time while during summer, the same process happens faster. She asks about this difference in time taken to her elder sister. She also asks her sister about why certain reactions occur rapidly while others occur slowly. Her sister explains her about the various factors that affect the rate of chemical reactions. Based on the above scenario, answer the following questions. The reaction of aluminum metal with dilute hydrochloric acid takes place faster as compared to zinc metal. What could be the reason for this difference?

Explain how velocity of air planes is calculated

Explain the following reactions with the help of balanced equations: Cinnabar is heated in air.