Question

Applications of Metalloids
Metalloids show intermediate properties between those of metals and non-metals and these
are called as semiconductors. Examples of semiconductors are Boron, Silicon, Germanium,
Arsenic, Antimony, Tellurium, Polonium. Metalloids are too brittle to have any structural
uses in their pure forms. Metalloids are mixed with other elements to Increase conductive
ability. They have specific uses as glasses, fire retardants, alloying components,
semiconductors, electronics and optical storage media. Boron is heat resistant alloy; it gives
green colour on explosion of crackers. Boron filaments are used in aerospace structure as
they are lightweight but possess high strength. Germanium is used in solar panels to increase
efficiency. Silicon combines with oxygen to form a number of substances like sand, glass and
cement. Arsenic is a toxic for creatures. It is used as insecticide and also for preservation of
wood. Antimony in its pure form, it acts as a semiconductor in things like diodes. Once
alloyed with other metals, it is used in batteries, cable sheathing and other similar
applications.
Question Answers
i) An unknown sample is crystalline solid with a blue-grey metallic luster. It is a
semiconductor and works well for technological applications such as the computer chip in
your phone. Which of the following has these properties?
a) zinc b) silicon c) sulphur d) lead and silicon
ii) Choose the correct one:
(a) Silicon is a metalloid present abundantly in Glass. Yes/No
(b) Metalloid is an element with all properties of Metal and Non-metal. Yes/No
ii) Support the statement with reasons that Hydrogen is not a Metalloid.​

Answer 1

Answer: Metalloids are usually too brittle to have any structural uses. They and their compounds are used in alloys, biological agents, catalysts, flame retardants, glasses, optical storage and optoelectronics, pyrotechnics, semiconductors

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Answer 2

Answer:

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