Many metals react with oxygen to form metal oxides. Potassium and sodium are soft metal which are easily cut exposing a shiny surface which changes to dull rapidly. The change from shiny to dull is ...

Here you get the CBSE Class 10 Science chapter 3, Metals and Non-Metals: NCERT Exemplar Solution (Part-III). This part of the chapter includes solutions for Question No.1 to 36 from the NCERT Exemplar ...

The oxide layer acts like a physical barrier, further slowing down the reaction between oxygen and magnesium. Therefore, cleaning the magnesium ribbon removes this oxide layer, exposing fresh ...

Here you get the CBSE Class 10 Science chapter 5, Periodic Classification of Elements: NCERT Exemplar Problems and Solutions (Part-III). This part of the chapter includes solutions for Question No.42 ...