Non metal generally donot displaces hydrogen from dilute acid ? why
why electric wire coated with PVC ?
why metal oxides are basic in nature?
copper vessels get a green coat when exposed to air in rainy season
why oxdes of very reactive metals cannot be reduced with carbon ? how these metals are obtained from their ores?
why zinc is used in the galvanisation of iron and not the copper?
Why Magnesium , Manganese does react with dilute HNO3 to evolve hydrogen gas
while other metals dont produce hydrogen gas when reacted with HNO3
An ore on treatment with dilute hydrochloric acid produces brisk effervescence. What type of ore is this? What steps will be required to obtain metal from the enriched ore?
name the gas evolved when dilute hcl reacts with sodium hydrogen carbonate. how is it recognised?
What is the difference b/w electrolytic reduction and electrolytic refining?
Name the constituents and uses of Brass,Bronze and Solder.
Give Reason:-
1)Gold ans silver are used to make jewellery.
2)Carbonate and sulphide ores are usually converted into oxides prior to reduction during the process of extraction.
why metal are not found in free state generally?
Differenciate between Flux and Slag.
. What are antacids? Name two compounds which are used as antacids
Non metal generally donot displaces hydrogen from dilute acid ? why
why electric wire coated with PVC ?
why metal oxides are basic in nature?
copper vessels get a green coat when exposed to air in rainy season
why oxdes of very reactive metals cannot be reduced with carbon ? how these metals are obtained from their ores?
why zinc is used in the galvanisation of iron and not the copper?
Why Magnesium , Manganese does react with dilute HNO3 to evolve hydrogen gas
while other metals dont produce hydrogen gas when reacted with HNO3
An ore on treatment with dilute hydrochloric acid produces brisk effervescence. What type of ore is this? What steps will be required to obtain metal from the enriched ore?
name the gas evolved when dilute hcl reacts with sodium hydrogen carbonate. how is it recognised?
What is the difference b/w electrolytic reduction and electrolytic refining?
Name the constituents and uses of Brass,Bronze and Solder.
Give Reason:-
1)Gold ans silver are used to make jewellery.
2)Carbonate and sulphide ores are usually converted into oxides prior to reduction during the process of extraction.
why metal are not found in free state generally?
Differenciate between Flux and Slag.
. What are antacids? Name two compounds which are used as antacids