METALS AND NONMETALS 2

Metals are lustrous whereas __________ have no lustre.

• NON METALS

• METALLOIDS

On burning, metals react with oxygen to produce metal oxides which are__________in nature.

• ACIDIC

• BASIC

• NEUTRAL

• NONE

Non-metals react with oxygen to produce non- metallic oxides which are________ in nature.

• BASIC

• ACIDIC

• NEUTRAL

• NONE

Some metals react with water to produce metal hydroxides and ___________ gas

• OXYGEN

• NITROGEN

• HYDROGEN

• HELIUM

Metals react with acids and produce metal salts and ____________gas.

• OXYGEN

• HYDROGEN

• NITROGEN

• HELIUM

When a _______ vessel is exposed to moist air for long, it acquires a dull green coating. The green material is a mixture of copper hydroxide (Cu(OH)2) and copper carbonate (CuCO3).

The following is the reaction

2Cu+H2O+CO2+O2→Cu (OH)2 + CuCO3 moist air

• IRON

• CUPPER

• ALUMINIUM

• STEEL

Metals like _____ and ______are soft and can be cut with a knife. Mercury is the only metal which is found in liquid state at room temperature.

• SODIUM

• POTASSIUM

• BOTH OF THESE

Since metals produce ringing sounds, they are said to be ____________

• SONOROUS

• NON-SONOROUS

The property of metal by which it can be drawn into wires is called ____________

• DUCTILITY

• MALLEABILITY

The property of metals by which they can be beaten into thin sheets is called___________

• DUCTILITY

• MALLEABILITY