aluminium is passive towards oxyacids due to formation of protevtive layer of oxide. this protective layer resists the contact of aluminium with water or oxygen thatswhy aluminium is passive towards oxyacids
Examples: nitric acid, sulfuric acid, phosphoric acid, perchloric acid, etc.
Laurentia was completely surrounded by passive margins during the Neoproterozoic period, approximately 750-600 million years ago. This period saw the formation of the supercontinent Rodinia, where Laurentia was a central part and was surrounded by passive margins as it drifted towards the equator.
A neutral aluminum atom has 3 valence electrons.
Aluminum foil forms a thin oxide layer on its surface that prevents further reaction with the environment. This passive layer protects the aluminum underneath from excessive corrosion and makes it suitable for cooking and food packaging. Its reactivity is controlled by this oxide layer, allowing it to be used safely for various household applications.
Wrapping hypothermia patients in aluminum foil helps to retain their body heat by preventing heat loss through conduction and evaporation. The reflective nature of aluminum foil can also help to direct heat back towards the body, assisting in the rewarming process.
Fluorine can not form oxyacids because fluorine is more electronegative than oxygen, and oxyacids are formed only from elements that are less electronegative than oxygen.
nitric acid is light sensitve , it decomposes when expose in light. when aluminium is added to the conc HNO3 it remain passive in conc nitric acid,...... and moreover aluminium oxide layer is also form due to which it remain passive in conc nitric acid...
Aluminum oxide will not decompose readily upon heating because it is a very stable oxide. Aluminum oxide is passive and is less affected by environmental factors.
Aluminum forms a passive oxide layer on its surface that protects it from further reacting with acids. This oxide layer acts as a barrier between the aluminum metal and the acid, preventing any significant reaction.
Oxyacids of iodine are:- iodic acid: HIO3- iodous acid: HIO2- hypoiodous acid: HIO- ortho periodic acid: HIO4- meta periodic acid: H5IO6
HCl4(AQ)
If you hold wheat in your hand, all passive mobs, including pigs, will come towards you.
Washing aluminum with an alkaline solution can cause the formation of aluminum hydroxide, which can result in a more passive and protective oxide layer on the surface of the aluminum. However, excessive exposure to alkaline solutions can also lead to pitting or corrosion of the aluminum. It is important to use the correct concentration and exposure time to avoid damaging the aluminum.
in my opinion flourine is very electronegative and it cannot exist in positive oxidation states in its compounds .in oxyacids of halogens ,oxygen carries a negative charge while the halogen carries a positive charge.the electronegativity of flourine is 4,while that of oxygen is 3.5. so due to high value of electronegativity ,flourine shows reluctance to form positive oxidation states and donot form oxyacids........
H2 and a polyatomic ion e.g.) H2CO3 (carbonic acid) hope that helps:)
symbols of the elements symbols of the elements
Examples: nitric acid, sulfuric acid, phosphoric acid, perchloric acid, etc.