Which one of the following elements is the main metallic constituent of haemoglobin?
Which of the following metal is the main constituents of haemoglobin?
Question 40 Identify the elements with the following property and arrange them in increasing order of their reactivity:
(a) An element which is a soft and a reactive metal.
(b) The metal which is an important constituent of limestone.
(c) The metal which exists in liquid state at room temperature.