CHEMICAL PROPERTIES OF METALS AND NON METALS

Which one of the following gas burns with the "pop" sound?

• Oxygen

• Hydrogen

• Chlorine

• Hydrogen Sulphide

MgO +H₂O =

• MgOH

• Mg₂O

• Mg(OH)₂

• Mg(O)₂

Potassium + Oxygen gives

• 2K₂O

• 2CaO

• 2mgO

• 2N₂O

Which one of the following metal reacts vigorously with oxygen and water?

• Sodium

• Potassium

• Calcium

• Magnesium

When MgO is dissolved in water, Mg(OH)2 is obtained. The solution thus obtained is _______________ in nature.

• Amphoteric

• Alkaline

• Neutral

• Acidic

Identify the non-metal which exists in a liquid state in room temperature 25∘C.

• Aluminium

• Mercury

• Iodine

• Bromine

What is the chemical formula of copper sulphate?

• CuSO₄

• CuCO₃

• CuCI₂

• CuO

When magnesium reacts with water and oxygen, what can we observe?

• Coated with black layer

• Does not burn

• Burns with a yellow flame

• Burns with a brilliant white flame.

Zinc + Sulphuric = Zinc Sulphate + ______________

• Oxygen

• Hydrogen Gas

• Nitrogen

• Hydrogen Sulphate

Metals react with acids to produce _____________.

• Oxygen

• Smoke

• Hydrogen

• Nitrogen