1. Explain displacement reaction with the help of an activity.
2. Explain the reaction of non-metals with oxygen with the help of an activity.
3. Write the uses of metals and non-metals.
4. Write the difference between metals and non-metals on the basis of their physical properties.
5. Name the two most ductile metals.
6. Sodium is stored in kerosene. Why?
7. What are oxides? Write the nature of metallic and non-metallic oxides.
8. Explain displacement reaction with the help of an example.
9. Explain the reactions of metals and non-metals with (i) Acids (ii) Air (iii) Water.
10. Write the uses of metals and non-metals in our daily life.
Answers
Answer:
Displacement reaction is a chemical reaction in which a more reactive element displaces a less reactive element from its compound. ... 2 Reaction of non - metals with oxygen : on-metals react with oxygen in the air to produce non-metal oxides. Here are two examples for the non-metals carbon and sulphur.
1)displacement reaction : High reactive metal displaces low reactive metal is called displacement reaction , example Iron (fe) +Copper sulphate( CuSo4) = Iron sulphate( FeSo4)+copper (Cu)
2)reaction with non-metals : when non-metals reacts with oxygen it catches fire,example magnesium (Mg) + oxygen (O2) =magnesiumoxide
3) used of metals :
it is used in utensils
it is used in vehicle parts
it is used in jewelries
it is used in satellites
it is used in airplane parts
it is used in thermometer (mercury)
it is used in nuclear power (uranium and thorium
uses of non-metals
it is used in fertilizers
it is used as antiseptic
it is used in crackers
it is used in bleaching powder
it is used to respiration processs
4)metals:
metals are hard
metals are sonorous
metals are ductile
metals are malleable
metals are lustrous
metals are good conductor of heat and electricity
non-metals:
non-metals are not hard
it is not sonorous
it is not ductile
it is not malleable
it is not lustrous
it is not good conductor of heat and electricity
5)Iron and copper
6)sodium is stored under kerosene because sodium is a high reactive metal when it reacts with water. so, it is stored under kerosene, because kerosene does not allow water to sodium
7)the nature of metallic oxides is basic and non-metallic oxides is acidic
9)metals with acid =when metas reacts with acid it produces hydrogen gas and burns with pop sounds
non-metals with acid =non-metals do not reacts with acid
metals with Air =metals reacts with oxygen. when it exposes to oxgen (air) it gets rusted example =Iron
non-metals with Air =when non-metals reacts with oxygen(air) it catches fire example =phosphorus
metals with water =metals reacts with water. when it reaches it will catches fire example =sodium
non-metals with water =non-metals do no reacts with water
Explanation:
i hope it is helpful