1. Explain about ductility.
2. Explain the physical properties of metals with suitable examples.
3. Gold jewellery does not become dull.Why?
4. Draw the diagram of identifying electric conductivity of a material.
5. Which gas makes a Pop Sound when it exposed to lighted match stick?
please answer it fast exam is going on..........
Answers
Answer:
1.Ductility is the ability of a material to sustain a large permanent deformation under a tensile load up to the point of fracture, or the relative ability of a material to be stretched plastically at room temperature without fracturing.
2.Most metals have many physical properties in common. For example, they are shiny silvery-grey solids with high melting points and boiling points, high density, good conductors of heat and electricity, malleable (easily bent or beaten into any shape) and ductile (strong enough to be drawn into wire).
3.Gold cannot become dull because they did not get moisture and does not react with air. Gold is non reactive to oxygen and other reactive metal.
Explanation:
5.Hydrogen
Hydrogen is the gas that makes a distinct 'pop' sound when exposed to a small fire of a lighted matchstick. This property is used in the identification of hydrogen in the Burnt Splint test of the gases in the laboratories, as no other gas is ever found to make such a sound on coming in contact with fire.
sorry friend don't know 4th one
Answer:
Ductility is the ability of a material to sustain a large permanent deformation under a tensile load up to the point of fracture, or the relative ability of a material to be stretched plastically at room temperature without fracturing.....Gold cannot become dull because they did not get moisture and does not react with air. Gold is non reactive to oxygen and other reactive metal.
Hydrogen
Hydrogen is the gas that mathat makes a distinct 'pop' sound when exposed to a small fire of a lighted matchstick. This property is used in the identification of hydrogen in the Burnt Splint test of the gases in the laboratories, as no other gas is ever found to make such a sound on coming in contact with fire