Question

give reason
1)magnesium is used for making fireworks
2)oxy-hydrogen and oxy-acetylene flame I'd used for cutting and welding
3)nitrogen is used for packaging of kurkure packets
4)iron and aluminum containers are not used to store the pickles and chutneys

Answer 1

Dear friend your answers :

1) Magnesium (Mg) is used for making fireworks as it burns vigorously in the contact of oxygen.

2) The oxy-hydrogen and oxy- acetelene flame is used for cutting and welding metals as the flame is composed of hydrogen and oxygen its flame burns with a lot of heat and thus makes the cutting and welding work easier .

3) Nitrogen is a less reactive give as compared to the oxygen or other gases so the food particles like the Kurkure are packed with it ,as the food don't gets easily oxydised by it.

4) The iron and aluminium containers are not used to store the pickles and chutneys as these are acidic in nature and get reacted with the aluminium and iron to produce hydrogen gas .

ThAnKs !✌️✌️

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Answer 2

1)magnesium has low ignition temperature so it can burn efficiently .
2)oxy-hydrogen and acetylene is used as hydrogen has high calorific value and melts metel easily.
3)nitrogen is used as preservative,and to keep kurkure chrispy .
4)pickles are sour ,this shows they are aciditic ,so if they are stored in these containers they will react with each other and taste will be spoiled