Which of the following metal is present in blood?
Iron
Potassium
Hydrogen
Magnesium
Iron is the metal present in haemoglobin in blood.
The metal which is always present in an amalgam is: (a) iron (b) aluminium (c) mercury (d) magnesium
Which among the following is the most reactive metal ?
(a) copper
(b) calcium
(c) iron
(d) magnesium