Metals and non metals

Question 1

Physical properties of ionic compounds

Answer 1

Solid and somewhat hard as it is held by strong forces of attraction bw positive and negative ion
Soluble in water but not solvents
Have high mp and bp as considerable amt of energy is required to break inter ionic attraction
Conduction of electricity requires movement of ions –> in water move to opp electrode when electricity is passed
Not possible Is solids rigid structure no movement of ions
Possible in molten state as electrostatic forces of attraction are overcome due to heat

Question 2

What is ionic compound what is it also known as

Answer 2

Compounds formed by the transfer of electrons from a metal to a non metal
Electrovalent compound

Question 3

Opposite charge…

Answer 3

Attract each other and are held by strong electrostatic forces

Question 4

Reactivity of a metal explains..

Answer 4

Tendency to attain a completely filled valency shell
Gain = -ve charge
Lose = +ve charge

Question 5

Reactivity series

Answer 5

k
Na
Ca
Mg
Al
Zn
Fe
Pb
H
Cu
Hg
Ag
Au

Question 6

Metals react with acid to form…H2 is not involved when…Exception

Answer 6

Metal + dilute acid –> Slt + H2
Not involved when metal reacts with HN03
Manganese and magnesium
Copper doesn’t react with acid

Question 7

Mention the diff metals that react with water

Answer 7

Metals like na and k are soluble nd react violently with hot water
Ca is less violent and soluble to form metal hydroxide and h2
Mg does not react with hot water but cold to form metal hydroxide and h2
Al fe and zn do not react with hot or cold but with steam to form metal oxide and h2
Silver gold cu and pb do not react with water at all

Question 8

Metal reaction with water

Answer 8

Metals - soluble metal + water –> Metal hydroxide + h2

Metals - less reactive - insoluble –> Metal oxide + h2

Question 9

Which 2 metals do not react with oxygen? Copper does not burn when it reacts but it forms a…
Iron reacts with oxygen to form…

Answer 9

Silver and gold
Black layered coat
Rust (Fe203.xh20)

Question 10

More reactive metals are kept in kerosene why? What are these metals and why do they have a thin layer of oxide

Answer 10

To avoid accidental fires
Na and k
To avoid further oxidation

Question 11

Xmetal + o2 –> XmetalO. This reaction forms a black oxide. Name the metal

Answer 11

Copper

Question 12

What is metal oxides nature? What are amphoteric oxides? Are metal oxides insoluble in water?

Answer 12

Basic but some of them are both acidic and basic in nature like cuo and al203 which react with both acids and bases which are known as amphoteric oxides. Metal oxides are insoluble but some of them dissolve to form alkalis like K2O and NA2O

Question 13

What happens when a metal reacts with air?

Answer 13

Metal + o2 –> Metal Oxide

Question 14

Physical properties of non metals and exceptions

Answer 14

Usually soft ( except diamond allotrope of carbon)
Bad conductors ( except graphite)
Do not have lustre (except iodine) 
Usually solid or gas ( except br which is liquid) 
Low density and mp

Question 15

Physical properties of metals and exceptions

Answer 15

Lustrous
Ductile 
Malleability 
Good conductors of heat and electricity --> gold and silver best conductors of heat, hg and lead least 
Sonorous 
Hard 
Solid
High mp ( except gallium and caesium)