Question

i) With copper wires Siya switches on light ii) Goldsmith made a sheet by hammering a gold ball. iii) Maya stretched the strings of the Satar. iv) Raghav put a spoon
$1$
in boiling soup and the spoon got hot_​

Answer 1

Answer:

this all are the properties of metal.

a)metal are ductile

b)metal are malleable

c)metal are sonorous

d)metal are good conductor of heat and electricity

Answer 2

THE PROPERTIES OF METAL ARE:

1. GOOD CONDUCTOR OF ELECTRICITY:
2. MALLEABILITY
3. DUCTILITY
4. METALS ARE SONOROUS
5. Conductor of heat

GOOD CONDUCTOR OF ELECTRICITY:

• ALL metals are good conductors of electricity because each metal atom has free electrons which means that they allow energy in the form of current to flow across a potential difference. Silver is the best conductor of electricity.

MALLEABILITY:

• Malleability is one of the physical properties by which a metal can be deformed into sheets, pressed, or rolled under compressive forces. The degree of malleability depends upon 2 factors; temperature and strength of the metallic bond. Gold is the most malleable metal.

DUCTILITY:

• Ductility is the property of metals that allows them to stretch without getting deformed. Ductility occurs as a result of tensile stress, while malleability is due to compressive stress on a metal. Gold silver and aluminum alloys are the most ductile metals.

METALS ARE SONORUS-

• Metals that are drawn into sheets or strings are capable of producing a ringing or deep sound, this is why strings of musical instruments are made up of metals.
• The characteristic feature of metal is that they have a lesser number of electrons in their outermost shell.
• Therefore when metal is hit, the electron cloud moves easily with low dissipation of energy. This allows the kinetic energy to travel in the form of waves which produces sound.

waves which produces sound.Conductor of heat :

• All metals are good conductors of heat.
• Thermal conductivity is the measure of the ability of a metal to transport heat from one point to another.
• Conduction of heat depends on electronic conduction
• Hence, heat is conducted from one point to another by the free electrons at a higher speed than that in insulators.

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