1. Name the gas that comes out when baking soda is
is mixed with vinegar. Coorbon dioxide
2. What kind of change takes place when you are setting curd? inrerisible
3. Name a process through which you can save iron objects from rusting.
4. Release of which can cause holes in the ozone layer? KCCFC
5. Name the process through which we get pure substances like common salt? Pat
Painting
Answers
Answer:
(1) Carbon Dioxide Gas
(2) Irreversible change and chemical change.
(3)Use Galvanized Metal
(4)chlorofluorocarbons (CFCs) and halons—gases
(5)MANNHEIM PROCESS AND HARGREAVES PROCESS..
Explanation:
carbon dioxide gas
(1)The reaction is: Sodium bicarbonate and acetic acid reacts to carbon dioxide, water and sodium acetate.
The solid baking soda was placed in li quid vinegar producing carbon dioxide gas, which is evident because of the formation of bubbles in the foaming mixture.
(2)
In the setting of curd, milk changes into new substance, curd. This is an irreversible process that means milk cannot be made from curd. Formation of new substance and irreversible process shows that setting of curd is a chemical change.
(3)Galvanization is a process used to preserve steel rust-free for many years. In the galvanizing process, a piece of steel is coated with liquid zinc. ... And third, zinc is highly reactive to oxygen and quickly forms a protective coating of zinc oxide which prevents the iron from further oxidation.
(4)Human activities cause ozone depletion and global warming
Human activities cause ozone depletion and global warmingOzone depletion occurs when chlorofluorocarbons (CFCs) and halons—gases formerly found in aerosol spray cans and refrigerants—are released into the atmosphere.
(5)Through "MANNHEIM PROCESS AND HARGREAVES PROCESS" which is used for production of Na2SO4 and HCl. HARGREAVESPROCESS: Mainly for preparation of salt cake(Na2SO4) by passing a mixture of SO2 and O2 through brine in a countercurrent manner.
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