Question : Which of the following material is a conductor of electricity?
Option 1: Silver
Option 2: Glass
Option 3: Mica
Option 4: Ebonite
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Correct Answer: Silver
Solution : The correct option is Silver.
Silver is an element with an atomic number of 47. It is a soft, white, lustrous transition metal. It conducts electricity. Mica, glass, and ebonite are not conductors of electricity. It is widely used for making ornaments. Silver is used to make mirrors as it is the best reflector of visible light. It is also used in dental alloys.
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Question : Which of the following is a semiconductor?
Option 2: Copper
Option 3: Glass
Option 4: Silicon
Question : Which of the following is a dark reddish-coloured stone used as raw material in aluminium smelting?
Option 1: Mica
Option 2: Gypsum
Option 3: Bauxite
Option 4: Conglomerate
Question : Which of the following is arranged in order of decreasing conductivity?
Option 1: Copper, aluminium, steel, silver
Option 2: Aluminium, silver, copper, steel
Option 3: Copper, silver, aluminium, steel
Option 4: Silver, copper, aluminium, steel
Question : Which among the following alloys is a combination of gold and silver?
Option 1: Bronze
Option 2: Constantan
Option 3: Solder
Option 4: Electrum
Question : Which of the following is not an example of an inflammable substance?
Option 1: Glass
Option 2: Alcohol
Option 3: LPG
Option 4: Petrol
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