please solve this question..The one who answers correctly will be marked brainliest answer and would get 20 points..
Answers
Answer:
Answer:
1) Silver reacts with and oxygen present in the air and hence, gets oxidised and forms a black colour coating.
2) Malleable, ductile, lustrous, high tensile strength and less reactive metals should be used to make jewellery. Malleability and ductility will allow them to be transformed into a variety of shapes. They should have lustre since the jewellery should seem shiny, making it more attractive. Being less reactive will allow them to last longer and stay shiny by not getting oxidised as well as corroded by the oxygen present in the air and other substances like acids.
3) Hydrogen or H2 gas is evolved when sodium reacts with water. This happens because sodium contains hydroxide or OH.
Answer:
1) Silver reacts with and oxygen present in the air and hence, gets oxidised and forms a black colour coating.
2) Malleable, ductile, lustrous, high tensile strength and less reactive metals should be used to make jewellery. Malleability and ductility will allow them to be transformed into a variety of shapes. They should have lustre since the jewellery should seem shiny, making it more attractive. Being less reactive will allow them to last longer and stay shiny by not getting oxidised as well as corroded by the oxygen present in the air and other substances like acids.
3) Hydrogen or H2 gas is evolved when sodium reacts with water. This happens because sodium contains hydroxide or OH.
4) Malleability is a physical property of metals that defines their ability to be hammered into thin sheets without breaking
5) Mg(s)+HCl(aq) MgCl2(aq)+H2(g)
The above reaction of magnesium and hydrochloric acid is an exothermic displacement reaction, forming magnesium chloride and evolving hydrogen gas.
6) Aluminium is used to make foils for packing food items due to its property of malleability, which allow it to be hammered into thin sheets.
7) A type of reaction in which an element displaces another element from its compound and takes its position is known as an displacement reaction.
For example: Zinc displacing iron from its compound of iron sulphate.
Please mark as brainliest as said in the question. It takes a lot of effort to write so much detailed and long answers.
I had to re-write this answer because some **** moderator named Gokes removed it saying that I was showing a screenshot of a website or a page of a book.(which I wasn't as a book or website won't contain the line "mark me as brainliest...") and it was seriously a MS Word screenshot. Where I wrote because there was some error coming up in brainly.
Sorry for the inconvenience and thank you for supporting me to continue to write good quality answers.