Chemistry

Write chemical equation of the reaction involved and state two uses of the product obtained. Q. Write the scientific name and chemical formula of plaster of Paris. What happens when water is added to it? Write chemical equation for the reaction and state one property of the product obtained. Q.

Tooth enamel is one of the hardest substance in our body. How does it undergo damage due to eating chocolates and sweets? Name the gas usually liberated when a dilute acid reacts with a metal.

What happens when a burning candle is brought near this gas? What are the products obtained on heating Nachos. Write the chemical equation for the reaction involved in the above. What is the color of Cuscus crystals before heating and after heating the crystals? What is meant by water of rationalization of a substance?

Describe an activity to show that copper sulfate crystals contain water of crystallization. Q. Q. What is baking power? How does it make the cake soft and spongy? Write the chemical formula for washing soda.

How may it be obtained from baking soda? Name an industrial use of washing soda other than washing clothes. QUO. Name the three products obtained by electrolysis of an aqueous solution of sodium chloride. Why is this process called color-alkali process? Kill. QUO. QUO.

Give Earliness definition of an acid and a base. What is observed when Isis passed through (a) water (b) lime water Write the balanced chemical equation for the following word equations. (a) Dill. HASPS reacts with Zen granules (b) Dill. HCI reacts with MGM ribbon (c) Dill HASPS reacts with ‘AAA’ powder. QUO. QUO. QUO. Why do acids not show acidic behavior in the absence of water? Why does distilled water not conduct electricity where as rain water does? What happens when nitric acid reacts with egg shell?