The metal which is always present in an amalgam is:
(a) iron (b) aluminium (c) mercury (d) magnesium

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Solution

(c) mercury
An amalgam is an alloy of mercury with one or more metals. The combination of sodium with liquid mercury is called sodium amalgam. The amalgam of mercury with gold, silver or zinc is widely used for dental fillings.

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The metal which is always present in an amalgam is: (a) iron (b) aluminium (c) mercury (d) magnesium

(c) mercury An amalgam is an alloy of mercury with one or more metals. The combination of sodium with liquid mercury is called sodium amalgam. The amalgam of mercury with gold, silver or zinc is widely used for dental fillings.

The metal which is always present in an amalgam is:
(a) iron (b) aluminium (c) mercury (d) magnesium

(c) mercury
An amalgam is an alloy of mercury with one or more metals. The combination of sodium with liquid mercury is called sodium amalgam. The amalgam of mercury with gold, silver or zinc is widely used for dental fillings.