2 thoughts on “Where should an object be placed from a converging lens of focal length 20cm, <br />so as to obtain a real magnified image”
Answer:
Copper is comparatively less reactive but reacts with reagents like oxygen and water in atmosphere in a slow time. Also carbon dioxide helps in the reaction. As it is a metal, it will start corroding[tex].[/tex]
After some days, we will observe greenish layer on the surface of copper vessel due to the formation of copper carbonate. The required reaction is:
Copper when reacts with carbon dioxide, water and oxygen forms basic copper carbonate.
Copper is comparatively less reactive but reacts with reagents like oxygen and water in atmosphere in a slow time. Also carbon dioxide helps in the reaction. As it is a metal, it will start corroding[tex].[/tex]
After some days, we will observe greenish layer on the surface of copper vessel due to the formation of copper carbonate. The required reaction is:
Copper when reacts with carbon dioxide, water and oxygen forms basic copper carbonate.
Answer:
Copper is comparatively less reactive but reacts with reagents like oxygen and water in atmosphere in a slow time. Also carbon dioxide helps in the reaction. As it is a metal, it will start corroding[tex].[/tex]
After some days, we will observe greenish layer on the surface of copper vessel due to the formation of copper carbonate. The required reaction is:
Copper when reacts with carbon dioxide, water and oxygen forms basic copper carbonate.
[tex]{ \boxed{ \rm{2Cu + CO_2 + O_2 + H_2O \longrightarrow CuCO_3.Cu_(OH)_2}}}[/tex]
The basic carbonate is a green coloured substance formed due time. Another example is the statue of liberty in New York, USA.
Answer:
Copper is comparatively less reactive but reacts with reagents like oxygen and water in atmosphere in a slow time. Also carbon dioxide helps in the reaction. As it is a metal, it will start corroding[tex].[/tex]
After some days, we will observe greenish layer on the surface of copper vessel due to the formation of copper carbonate. The required reaction is:
Copper when reacts with carbon dioxide, water and oxygen forms basic copper carbonate.
[tex]{ \boxed{ \rm{2Cu + CO_2 + O_2 + H_2O \longrightarrow CuCO_3.Cu_(OH)_2}}}[/tex]
The basic carbonate is a green coloured substance formed due time. Another example is the statue of liberty in New York, USA.