Metal and Non - Metal

A non metal used to preserve food material is :

• Carbon

• Phosphorus

• Sulphur

• Nitrogen

The metals that float when treated with water are:

• Maganese and Sodium

• Sodium and Calcium

• Magnesium and Sodium

• Magnesium and Calcium

Which metal is liquid at room temperature

• Bromine

• Sodium

• Lithium

• Mercury

Process by which metal with high reactive series obtained

• Electrolysis reduction

• Calcination

• Reduction

• Thermit reduction

Alloy in which one of the metal is mercury known as

• Anode mud

• Amalgam

• Ore

• Gangue

Brass is a mixture of

• Cu and Sn

• Cu and Zn

• Hg and C

• None of these

The most abundant metal in the earth's crust is

• Iron

• Calcium

• Aluminium

• Sodium

Galvanisation is a method of protecting iron from rusting by coating with a thin layer of

• Galium

• Aluminium

• Silver

• Zinc

Amalgam is an alloy of

• Copper and Tin

• Mercury

• Lead and Tin

• Copper and Zinc

_______is an allotroph of carbon and is the hardest natural substance.