Answer all the questions:
1. Can we store solution of zinc sulphate in a vessels of aluminium? Why?
2. State two uses of each sulphur and phosphorus?
3. Sodium is store in kerosene.
4. What are advantage of using CNG and LPG as a fuel?
5.Explain about safety-matches in brief?
Class - 8th
Answers
Answer:
Explanation:hwqbbababaqbbanqbavabqbabwajbabwkabbqqbjaaj
1. Cᴀɴ ᴡᴇ sᴛᴏʀᴇ sᴏʟᴜᴛɪᴏɴ ᴏғ ᴢɪɴᴄ sᴜʟᴘʜᴀᴛᴇ ɪɴ ᴀ ᴠᴇssᴇʟs ᴏғ ᴀʟᴜᴍɪɴɪᴜᴍ? Wʜʏ?
→ No, aluminium is more reactive than zinc. So, it will displace zinc from its solution and so if we store zinc sulphate in a vessel of Aluminium to displacement reaction there will be holes in the vessel.
2. Sᴛᴀᴛᴇ ᴛᴡᴏ ᴜsᴇs ᴏғ ᴇᴀᴄʜ sᴜʟᴘʜᴜʀ ᴀɴᴅ ᴘʜᴏsᴘʜᴏʀᴜs?
→ Uses of sulphur :-
i) Sulphur is used in crackers.
ii) Sulphur is used in making creams for skin diseases.
Uses of phosphorus :-
i) phosphorus is used in making for burning.
ii) Used for making fertilisers and insecticides.
3. Sᴏᴅɪᴜᴍ ɪs sᴛᴏʀᴇ ɪɴ ᴋᴇʀᴏsᴇɴᴇ.
→ Sodium and patossium are very reactive metals. They reacts with air and water very violently and produces a lot of heat. So, they are started in kerosene. So, that it does not react with air and water.
4. Wʜᴀᴛ ᴀʀᴇ ᴀᴅᴠᴀɴᴛᴀɢᴇ ᴏғ ᴜsɪɴɢ CNG ᴀɴᴅ LPG ᴀs ᴀ ғᴜᴇʟ?
→ The advantages of using CNG and LPG as fuels are :
- They are clean fuel.
- They produces less polution.
- They can be used directly for burning.
- Their cast is low.
5.Exᴘʟᴀɪɴ ᴀʙᴏᴜᴛ sᴀғᴇᴛʏ-ᴍᴀᴛᴄʜᴇs ɪɴ ʙʀɪᴇғ?
→ A mixture of antimony trisulphicle potlusium and chlorate and white phosphorus with same glue and strach was applied on the head of a match made of suitable wood. However, white phosphorus proved to be dangerous. So their days, the head of the match contain only antimony trisulphide and potassium chlorate. When the match is struck against the rubbing suface, some red phosphorus glue spark due to friction igniting antimony trisulphid and start burning while potassium chlorate supplied oxygen,