Ch 3 METALS AND NON METALS Flashcards
Name Some Physical Properties of Metals.
•Metals are Shiny they have metallic Lustre.
•They are Malleable and Ductile
•They can Conduct Electricity
•They have high melting point
•They are Sonorous
Name the Metals which are Poor Conductors of heat.
Lead
Mercury
Name the metals which are best conductors of heat.
Silver
Copper
Full form of PVC?
Polyvinylchloride
Which Metal exists in liquid form at Room temperature?
Mercury
Name metals with very low melting point?
They can melt on palm
Gallium
Caesium
Name the metals and it’s type which are so soft that they can be cut with a knife.
Alkali Metals like Sodium Lithium and Potassium
*They have low densities and low melting points
Which oxides are produced by Non metals and Metals?
Non metals produce Acidic Oxides when dissolved in water
Metals produce Basic Oxides
What are Amphoteric Oxides ?
Give eg
Oxides which react with both acids as well as bases to produce salt and water are called Amphoteric Oxides
Eg
Zinc Oxide
Aluminium Oxide
What happens when Potassium and Sodium are kept in Open?
They catch fire
Hence kept in kerosene
What’s Anodising ?
Process of forming a thick oxide layer of aluminium
Metal + water gives???
Metal Oxide+Hydrogen
Metal Oxide + water gives????
Metal Hydroxide
When does Metals like Potassium and Sodium react violently??
They react violently with Cold water
This reaction is exothermic and evolved hydrogen immediately catches fire.
What happens when calcium reacts with water???
Why does Calcium floats ??
It’s less violent. Heat evolved is not sufficient for hydrogen to catch fire
Calcium starts floating bcz bubbles of hydrogen gas formed stick to the surface of metal.
Does Magnesium reacts with cold water or hot water??
It reacts with hot water and forms Magnesium hydroxide and hydrogen and it also floats like calcium due to same reason.
Name the metals which reacts with steam and not with hot or cold water.
Aluminium, Iron , Zinc
Name the metals which do not react with water at all.
Lead
Copper
Silver
Gold
Which Non metal is liquid when all are either gases or solids?
Bromine
Which Non metal is lustrous ?
Iodine
Name the non metal which Is conductor of electricity and a non metal which is hardest and has very high melting point?
Con of elect - Graphite
Hardest and high melting point - Diamond
Both are allotrope of Carbons
