Question

6. What are the uses of polyester?


7. Will force of friction come into play when a rain drop rolls down a glass

window pane?


8. In a chemical reaction iron is unable to displace Zinc from Zinc Sulphate.

Why?


9. Explain the physical and chemical properties of metals with suitable

examples.

​

Answer 1

Explanation:

6. Polyesters are widely used in clothing fabrics. Polyester is also employed in the manufacture of many home furnishing materials such as bedsheets, curtains, blankets, and pillowcases. Polyester is also used in upholstered furniture. Another important application of this polymer is in the manufacture of mouse pads.

7. Yes, force of friction comes into play when a raindrop rolls down a glass window pane.

8. Iron cannot displace zinc from the zinc sulphate because zinc is more reactive metal . More reactive metal can displace less reactive metal from its salt solution.

Answer 2

6. What are the uses of polyester?

=Industrial polyester fibers, yarns and ropes are used in car tire reinforcements, fabrics for conveyor belts, safety belts, coated fabrics and plastic reinforcements with high-energy absorption. Polyester fiber is used as cushioning and insulating material in pillows, comforters and upholstery padding.

7. Will force of friction come into play when a rain drop rolls down a glass window pane?

=Yes , the force of friction come into play when a rain drop rolls down a glass window pane because the pane is in contact with the drop and the drop is in motion. And the surface of both the object are interlocking with each other.

8.In a chemical reaction iron is unable to displace Zinc from Zinc Sulphate. Why?

= Iron cannot displace zinc from the zinc sulphate because zinc is more reactive metal . More reactive metal can displace less reactive metal from its salt solution.

9. Explain the physical and chemical properties of metals with suitable  examples.

=Most metals are silvery looking, high density, relatively soft and easily deformed solids with good electrical and thermal conductivity, closely packed structures, low ionisation energies and electronegativities, and are found naturally in combined states.The density of metals is usually high. Metals are malleable and ductile. Metals form an alloy with other metals or non – metals. Some metals react with air and corrode.Metals are good conductors of heat and electricity.