Metal and Non metal

A non metal used to preserve food material is:

• Carbon dioxide
• Nitrogen
• Hydrogen
• Oxygen

The metals that float when treated with water are:

• Mn and Ca

• Mg and Ca

• Na and Ca

• Mg and Na

Which metal is liquid at room temperature

• mercury

• bromine

• lithium

• sodium

Tags

NGSS.MS-PS1-4

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

• Hg and C

• Cu and Zn

• None of these

The most abundant metal in the Earth's crust is

• Gold
• Aluminum
• Copper
• Iron

-- is an allotrope of carbon and is the hardest natural substance.

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

• Gallium

• Aluminium

• Silver

• Zinc

Which property of Gold makes it suitable for making electric wires?

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• Good conductor of electricity
• Ductile
• Malleable

• Good conductor of heat