Some substances when placed in a magnetic field, are feebly magnetised in the direction of the magnetising field. These substances, when brought close to a pole of a powerful magnet. are attracted towards the magnet. These are called 'paramagnetic' substances and their For examples : of paramagnetic substances are aluminium, sodium, platinum, copper, manganese, antimony, chloride, liquid oxygen. Solution of salts of iron and nickel, etc. So, correctly matched pair are paramagnetic - Sodium.