Question : Which element of the boron family has a high boiling point, making it ideal for recording temperatures that would vaporise a thermometer?
Option 1: Thallium
Option 2: Aluminium
Option 3: Gallium
Option 4: Indium
Correct Answer: Gallium
Solution : The correct answer is gallium.
Most metals can be easily alloyed with gallium, particularly those that melt at lower temperatures. Gallium has a high boiling point, making it ideal for measuring temperatures that would cause a thermometer to evaporate. It is a chemical element with the symbol Ga and atomic number 31 and is part of Group 13 on the periodic table. Gallium shares similarities with other metals in the same group, such as thallium, indium and aluminium.
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Question : Which chemical element has an atomic number of 31?
Option 1: Aluminium
Option 2: Gallium
Option 3: Indium
Option 4: Thallium
Question : Which of the following statements is correct regarding fuse wire?
Option 1: It has a low melting point and low conductivity.
Option 2: It has a high melting point and low conductivity.
Option 3: It has a low melting point and high conductivity.
Option 4: It has a high melting point and high conductivity.
Question : Sapphire and Ruby are varieties of natural:
Option 1: Aluminium sulphide
Option 2: Aluminium hydroxide
Option 3: Aluminium carbonate
Option 4: Aluminium oxide
Question : Aluminium salt commonly used to stop bleeding is:
Option 1: Aluminium nitrate
Option 2: Aluminium sulphate
Option 3: Aluminium chloride
Option 4: Potash alum
Question : Which element behaves chemically both as metal and non-metal?
Option 1: Argon
Option 2: Boron
Option 3: Xenon
Option 4: Carbon
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