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
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Correct Answer: Electrum
Solution : The correct option is Electrum.
The alloy composed of gold and silver is known as electrum. It occurs naturally and has been historically used for coins and jewellery. The proportion of gold and silver in the electrum can vary, leading to different shades of colour.
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Question : Which of the following is a semiconductor?
Option 1: Silver
Option 2: Copper
Option 3: Glass
Option 4: Silicon
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 of the following material is a conductor of electricity?
Option 2: Glass
Option 3: Mica
Option 4: Ebonite
Question : Which among the following is not one of the important gold mines in the country?
Option 1: Kolar
Option 2: Hospet
Option 3: Ramagiri
Option 4: Hutti
Question : Haemoglobin in the blood is a complex protein rich in:
Option 1: Iron
Option 2: Silver
Option 3: Copper
Option 4: Gold
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