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Q.1. can you store lemon pickle in an aluminium utensil?explain

Q2. give reasons for the following.

a. aluminium foils are used to wrap food items.

b.immersions rods for heating liquid are made up of metalic substance.

c. copper cannot displace zinc from its salt solution.

d.sodium and potasium are stored in kerosene.

A.1  No,  lemon pickle cannot be stored in an aluminium utensil as acids react with metals and form hydrogen gas thus spoiling the food.

A.2(a)  Aluminium foils are used to wrap food items because they do not react with food items.

  (b)  Immersion rods for heating liquids are made up of metallic substances because they are good conductors of heat. So, liquid could be heated easily.

  (c) Copper cannot displace zinc from its salt solution because copper is more reactive than zinc.

  (d)  Sodium and potassium are stored in kerosene because they are very reactive metals.They react vigorously with oxygen and water.A lot of heat is generated in the reaction.They are , therefore, stored in kerosene.

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Q.1]  No.  We  cannot   store  lemon  pickle  in  an  alluminium  utensil  .  This  is  because,  lemon  pickle  contains  citric  acid,  which  can  react  with  a  metal,  and,  alluminium  is  a  metal.  So,  the  lemon  pickle  will  react  with  the  alluminium  metal  and  can  produce  metal  salts  and  hydrogen  gas.  This  can  make  the  lemon  pickle  bad  to  eat.

Q.2]  a]  The  property  of  metals  by  which  thaey  can  be  beaten  into  thin  sheets  is  called  malleability.  Since  alluminium  is  a  metal,  it  can  be  beaten  into  sheets.  Because  of  this  property,  allunminium  is  widely  used  all  over  the  world  to  wrap  food  items.

b]  Immersion  rods  are  made  up  of  metallic  substances  because  metals  are  good  conductors  of  heat  and  electricity.

c]  In  the  reactivity  series,  only  a  more  reactive  metal  can  displace  a  less  reactive  metal.  The  vice-versa  is  not  possible.  So,  copper  cannot  displace  zinc  from  its  solution,  because,  zinc  is  more  reactive  than  copper  [ie,  copper  is  less  reactive  than  zinc  ].

d]  Sodium  and  Potassium  metals  are  very  reactive  because  they  react  with  oxygen  and  water  easily.  A  lot  of  heat  is  produced  in  the  reaction.  So,  to  avoid  the  contact  between  oxygen  and  water,  they  are  stored  in  kerosene.

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Q.1] No. We cannot store lemon pickle in an alluminium utensil . This is because, lemon pickle contains citric acid, which can react with a metal, and, alluminium is a metal. So, the lemon pickle will react with the alluminium metal and can produce metal salts and hydrogen gas. This can make the lemon pickle bad to eat.

Q.2] a] The property of metals by which thaey can be beaten into thin sheets is called malleability. Since alluminium is a metal, it can be beaten into sheets. Because of this property, allunminium is widely used all over the world to wrap food items.

b] Immersion rods are made up of metallic substances because metals are good conductors of heat and electricity.

c] In the reactivity series, only a more reactive metal can displace a less reactive metal. The vice-versa is not possible. So, copper cannot displace zinc from its solution, because, zinc is more reactive than copper [ie, copper is less reactive than zinc ].

d] Sodium and Potassium metals are very reactive because they react with oxygen and water easily. A lot of heat is produced in the reaction. So, to avoid the contact between oxygen and water, they are stored in kerosene.good day

 
 
 
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Aditya,  why   did  you  copy  my  answer?  You  are  so  cruel!....

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Q!No, lemon pickle cannot be stored in an aluminium utensil as acids(particularly citric acids used as a preservative) react with metals and form hydrogen gas thus spoiling the food

Q2 ....a.........Aluminium foils are used to wrap food items because Al is malleable and it is good conductor of heat and can keep food warmQ2.....b......Because metals are good conductorsQ2.....c....Because Cu is less reactive than Zn. and in displacement reaction strong metals replace weak metals in their aqueous solutions So,copper cannot displace zinc from its salt solution.Q2...d.....Sodium and potassium are very eager to combine with O2. Their density is low and they float on water. This, again makes them to come in contact with O2. Kerosene cuts the supply of air which contains O2 because, it is saturated. SoSodium and Potassiumare stored in wate...Hope that helps..Thumbs up plz....:-)
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Copper cannot displace Zinc from its salt solution because Zinc is more reactive to copper, therefore it cannot displace zinc.
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1) Aluminium is a metal because of its malleability it can beaten into thin sheets.It is less reactive through air and moisture and acts as a barrier through air and moisture. Since food items remains fresh in aluminium foils.
2) Metals are good conductors of heat and electricity.Immersion rods are made of metallic substance heat pass through it and make the liquid boil.
3) Copper is less reactive than zinc. For more reactive metal cannot displace less reactive metal.So copper cannot displace zinc.
4) Sodium and Potassium are very reactive metal. It reacts vigorously with oxygen and water.A lot of heat is generated in the reaction. Therefore, it is stored in kerosene.
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Answer1:
No we cannot store lemon pickel in aluminium utensil. This is because lemon pickle is acidic and can react with aluminium and can form toxic substances.
Answer2:
​a). This is because aluminium is malliable(property of metal,they can be beaten into thin sheets).
b) Immersion rods are made up of metallic substance as metals are good conductors of heat and electricity.
c) This is because in displacement reaction only more reactive metals can replace less reactive metals. As zinc is more reactive than copper, copper cannot replace zinc.
d) Sodium and potassium are highly reactive metals. They can burst if exposed to air or water.So in order to prevent this we store them in kerosene. Also kerosene avoids contact between O2 and H2O.
Hope these answers have helped you..
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Ans.1.    No, lemon pickles cannot be stored in an aluminium container.
because the citric acid present in lemon reacts with aluminium to produce metal salts and hydrogen gas.


Q2
a.     Aluminium foils are used to wrap food items because aluminium metal is malleable. Therefore, it can be beaten into thin foils.
b.    Metals are good conductor of heat and electricity, so immersion rods are made up of metallic substances.
c.    Copper is less reactive than zinc and so placed below zinc in the reactivity series of metals. A less reactive metal cannot displace a more reactive metal from its salt solution.                 Hence,copper cannot displace zinc from its salt solution.
d.    Because if they kept open they can burn and if they kept in water they can react with water. So, they are kept in kerosene.
       Sodium and Potassium are the most reactive metals on this earth.
       They react very explosively with both water and air that is why they are stored in kerosene instead.​

hope it helps....
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Ans1. Lemon pickle cannot be stored in aluminium utensils because lemon pickle contains acids which can react with aluminium (metals) liberating hydrogen gas this can lead to the spoiling of the pickle.
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