Question

1. Which of the following is malleable? a Aluminium b. Oxygen C. Coal 2. Which of the following is used to make vulcanised rubber? a Nitrogen b. Gold c Sulphur 3. Which of the following is not used to make ornaments? a Mercury b. Gold C. Silver 4 Which method cannot prevent rusting? a Electroplating b. Galvanisation o c. Painting O 5. Which metal is used as a filament in bulbs? a. Copper b Silver C. Tungsten 6. Which metal can be cut with a knife? a Potassium b. Diamond O c. Mercury O d. Platinum d. Boiling O d. Chromium d. Gold 79​

Answer 1

Answer:

HERE IT IS

Explanation:

1-A  2-C  3-A  4-C  5-C  6-A  

Answer 2

Answer:

a) Aluminium is malleable

c) Sulphur is used to make vulcanized rubber.  

a) Mercury is not used to make ornaments.  

d) Boiling method cannot prevent rusting

c) Tungsten is used as a filament in bulbs.  

a) Potassium metal can be cut with a knife.

Explanation:

• Aluminium is a lightweight, silvery-white metal. It's pliable and malleable. Cans, foils, culinary utensils, window frames, beer kegs, and aeroplane parts are all made of aluminum.
• Natural rubber and other polydiene elastomers are converted to cross-linked polymers through vulcanization, a chemical process. Sulfur is the most prevalent vulcanization agent.
• Because of its toxicity and liquid condition at normal temperatures, mercury has little utility as a jewelry metal.
• Tin, a less reactive metal than iron, is electroplated on the inside of a steel food can. It creates a physical barrier between the can and oxygen and water, preventing corrosion. Galvanizing is a rust-prevention technique. A thin layer of zinc is applied to the iron or steel workpiece. By keeping moisture from reaching the metal, a good quality paint will inhibit rusting.
• Tungsten is used for making filament of an electric bulb due to them being an alloy it has a very high melting point. It has very high resistivity so it does not burn easily at room temperature
• Sodium, potassium, lithium are soft metals and can be easily cut.