When a copper rod is dipped in aqueous silver nitrate solution, the colour of the solution changes to blue. This is because

The image formed by a convex mirror of a real object is larger than the object

Match List 1 with List 2 and select the correct answer using the code given below the lists :

All the elements in a group (family) have a common valency. For example, all the elements of the carbon family (carbon, silicon, germanium, tin and lead ) have common valency four. However, some of these elements can also have valency two. Which of the following can have valency two?

The major component used in preparation of different types of glasses is

The main constituent of vinegar is