Question

Which of the following is found in solid state at room temperature?

a) Stone b) Sand c) Mercury d) Both a and b​

Answer 1

Answer:

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Explanation:

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Answer 2

Answer:

Mercury is liquid at room temperature. Stone and sand are found in solid state at room temperature.

Therefore, the option (d) is correct.

Explanation:

• Mercury is the only metal in whole periodic table which is not liquid at room temperature. The electronic configuration of mercury Hg : [Xe]4f¹⁴5d¹⁰6s².
• Most of the metal have tendency to share their electrons with neighboring atoms. The mercury have very less tendency to share its electrons with other atoms.
• This unusual property of the mercury is due to electron filled orbitals which we can see from its electronic configuration. The completely filled orbitals make mercury more inert. So it doesn't share its electrons with others.
• Mercury has this property of being liquid at room temperature. Due to this reason, mercury is used in thermometers. The slightest temperature change can be noticed because Hg has very high expansion coefficient.
• Sand is solid because each individual grain of sand has its own shape. It keeps that shape at room temperature.