Brass

• Cu (70%) +Zn (30%)
• In making  utensils

Bronze

• Cu (90%) +  Sn (10%)
• In making coins, bells  and  utensils

German Silver

• Cu (60%) + Zn (20%) + Ni (20%)
• In making utensils

Rolled Gold

• Cu (90%)  + Al (10%)
• Making ornament

Magnalium

• Al (95%) + Mg (5%)
• Frame of aeroplane

Stainless Steel

• Fe(75%)+Cr(15%)+Ni(10%)+C( .05%)
• making utensils

© 2023, www.mindplan.in

© 2023, www.mindplan.in

• Gold is called the king of metals.

• Lightest Metal – Lithium
• Heaviest metal – Osmium
• Hardest metal – Chromium

• Copper is used in lightning conductors.

• Sodium metal is stored in kerosene.

• Sodium metal is used for street lights.

• Calcium phosphate is found in large amount in human bones

• Mobile phone batteries are mainly made of lithium metal. 

• The chemical name of Quicklime is calcium oxide. 

• **  Zinc phosphide is used for killing rats.

• Nichrome wire is used in electrical heater.( Ni,cr,Fe ).

• Potassium carbonate (K2CO3) is known as  Perl Ash.

• Palladium metal is used in aeroplanes.

• ** Co (60) Is used in cancer treatment.

• ** Onions and garlic have an odour due to potassium.

• ** In Fireworks, Crimson red colour is due to the presence of strontium  (Sr).

• Green colour is due to the presence of Barium in fireworks.

• Silver chloride is used in photochromatic glass.

• ** Silver iodide is used in artificial rain. 

• To Harden the gold, copper is mixed, pure gold is 24 carat.

© 2023, www.mindplan.in