G. Short Answer Type-Il Questions:
Give reasons for the following:
(a) Electric wires are made of copper.
(b) Gold and silver are used for making jewellery.
(c) Graphite is used for making electrodes in electric cells.
2.In evening, Sonu plays guitar for the poor children of his colony. They all enjoy listening to the guitar.
Sonu even teaches some of them how to play guitar, free of cost.
(a) Name the property because of which strings in guitar are made of metal.
(b) What do we learn from Sonu?
Answers
Answer:
a) because they are good conductor of electricity and allows neutrons to move from them easily.
Answer:
G ( a)
Excellent Conductor of Electricity: Copper is an excellent conductor of electricity; no other metal can compete with it in terms of electrical conductivity. The wires made of this reddish metal are capable of carrying comparatively more electric current per diameter of wire.
( b)
Platinum, gold and silver are used to make jewellery because the metals used in jewellery are always be chosen on the basis of its reactivity. ... They are highly lustrous metals which are resistant to corrosion. They are highly malleable and ductile so can be transformed into any shape or design
( c)
Graphite is used as an electrode because it conducts electricity without taking part in the chemical reaction
2....
( a)
Ductility. Ductility is a property of metals by which they can be drawn into long wires.
( b)
I don't know this answers