Question

anyone send me the notes of chemistry class10 lesson 1​

Answer 1

Hey Ma8 ,

✌✌✌

¤=> chemical reaction is the process in which substance undergo a chemical change

¤ properties of chemical reaction :-

# change in temperature

# change in colour

# change in state

# formation of precipited

# evolution of gases

=> types of chemical reaction

# combination reaction

# decomposition reaction

# displacement reaction

# double displacement reaction

# redox reaction

¤ combination reaction => a chemical reaction in which two or more elements combine to form a single product

2Mg + O2 = 2MgO

¤ decomposition reaction => a chemical reaction in which substance breakdown to produce two or more simpler substance

=> types of decomposition reaction

¤ electrolytic decomposition reaction => when decomposition reaction is carried out by electricity

2H2O = 2H2 + O2

¤ photodecomposition reaction => when decomposition reaction is carried out with the help of sunlight

2AgCl = 2Ag + Cl2

¤ thermal decomposition reaction => when decomposition reaction is carried out by heating

2FeSO4 = Fe2O3 + SO2 + SO3

¤ displacement reaction => a chemical reaction in which more reactive element displace less reactive element

Zn + CuSO4 = ZnSO4 + Cu

¤ double displacement reaction=> a chemical reaction in which two or more elements exchange their atoms and ions to form product

Na2SO4 + BaCl2 = BaSO4 + 2NaCl

¤ redox reactions => a chemical reaction in which both reduction reaction and oxidation reaction takes place simultaneously

CuO + H2 = Cu + H2O

¤ oxidation reaction => gain of oxygen or removal of hydrogen is called oxidation reaction

¤ reduction reaction => gain of hydrogen or removal of oxygen is called reduction reaction

¤ corrostion => when metal is exposed to the air moist water acid etc for some time a thin layer of oxide is formed

¤ rancidity => it is the process in which taste and smell of food gets spoiled due to oxidation

¤ corrostion can be prevented by :-

# oiling

# painting and greasing

# galvanisation

# alloying

# tin or chromium plating

¤ alloy => alloy is a homogeneous mixture of two or more metals or Metal and non metal

¤ rancidity of food can be prevented by :--

# packing them in nitrogen gas

# adding the antioxidants

# keeping the food in refrigerator

# storing in air tight container


GK => iron pillar of delhi do not corrode because they developed a process which prevented iron from rusting

*****

follow me then i will follow you BACK

Answer 2

Answer:

Just refer to the 7 pics sent in the attachment.......

Mark as Brainliest.......