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⚜??Brainly Buddy??⚜ 6 years, 1 month ago
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Meghna Thapar 6 years, 1 month ago
Metals are shiny because they have a lot of free (i.e. delocalized) electrons that form a cloud of highly mobile negatively charged electrons on and beneath the smooth metal surface
⚜??Brainly Buddy??⚜ 6 years, 1 month ago
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Yogita Ingle 6 years, 1 month ago
Substances which show the acidic or basic behavior of other substance by change in colour are known as indicator.
Type of Indicator: There are many types of indicators. Some common types of indicators are
- Natural
- Olfactory Indicator
- Synthetic Indicator
- Universal Indicator
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Yogita Ingle 6 years, 1 month ago
DNA copying mechanism is extremely necessary for reproduction as copying of DNA helps in transfer of information or characters from parents to offspring. It also generates variations during sexual reproduction. This variation leads to evolution. DNA copying is also necessary because DNA (Deoxyribonucleic acid) is the genetic material found in chromosomes, which are present in the nucleus of a cell. DNA determines the body design of an individual. It carries the genetic information and key for the production of every type of cell proteins, which control the function of living organisms. DNA copying also helps in proper survival of the organism by similar copying and variation during DNA copying leads to evolution.
During sexual reproduction, the reproducing cells or germ cells have half the number (amount) of chromosomes and DNA as compared to somatic or body cells or non-reproducing cells. As the offspring receives one DNA copy from each parent, this complex mechanism helps to maintain the amount of DNA constant in an individual. If the DNA had to get doubled during sexual reproduction, then each generation would have double the amount of DNA content as compared to the previous generation. That is why, the amount of DNA does not get doubled during sexual reproduction.
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꧁༒☬Sowndu ☬༒꧂??? ꧁༒????༒꧂??? 6 years, 1 month ago
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Yogita Ingle 6 years, 1 month ago
Uses of Baking Soda
- It is used in making soft and fluffy bread and cakes due to the production of carbon dioxide when it is heated or mixed in water.
NaHCO3 + H+ → CO2 + H2O + sodium salt of acid
- It is used for making soda-acid fire extinguisher.
- It is used as an ingredient in the manufacturing of antacids.
Uses of bleaching powder:-
- It is used for bleaching cotton and linen in textile industry.
- It is used for bleaching wood pulp in paper factories and for bleaching washed clothes in laundry.
- As an Oxidising agent in many chemical industries.
- It is used for disenfecting drinking water to make it free of germs.
Posted by Rahul Kumar 6 years, 1 month ago
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Yogita Ingle 6 years, 1 month ago
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Posted by Asutosh Mishra 6 years, 1 month ago
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Yogita Ingle 6 years, 1 month ago
The plaster gets its name because, its main ingredient gypsum is found abundantly in Paris. The white powder will form a paste when it is mixed with water and it will harden into solid structures when dried. Thus, Plaster of Paris is used to make casts and moulds.
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Neha Bhagat 6 years, 1 month ago
1Thank You