Question

Gallium at room temperature is in:
 $ A) $ Plasma state
 $ B) $ Liquid state
 $ C) $ Solid state
 $ D) $ Gaseous state

Answer 1

Hint: Gallium is a chemical element with the symbol $ Ga $ and nuclear number $ 31 $ . It is in group $ 13 $ of the periodic table, and thus has similarities to the other metals of the group, aluminium, indium, and thallium. Elemental gallium is a delicate, silvery metal at standard temperature and pressure, however in its liquid state it becomes silvery white.

Complete answer:
The melting point of gallium is used as a temperature reference point. Gallium alloys are used in thermometers as a non-toxic and environmentally friendly alternative to mercury, and can withstand higher temperatures than mercury. An even lower melting point of $ - {19^ \circ }C $ . Below the freezing point of water, is claimed for the alloy galinstan, but that may be the freezing point with the effect of supercooling.
The melting point of gallium permits it to soften in the human hand, and afterward set whenever eliminated. The fluid metal has a solid propensity to supercool beneath its melting point of freezing point. Gallium nanoparticles can be kept in the liquid state under $ 90K $ . Seeding with a crystal assists with starting freezing. Gallium is one of the four non-radioactive metals that are known to be liquid at, or close, typical room temperature.
Gallium is a soft, silvery metal used primarily in electronic circuits, semiconductors and light-emitting diodes. It is also useful in high-temperature thermometers, barometers, pharmaceuticals and nuclear medicine tests.
So, the correct answer is $ (B) $ Liquid state.

Note:
Gallium's boiling point, $ 2673k $ , is in excess of multiple times higher than its melting point on the total scale, the best proportion between melting point and boiling of any element. Unlike mercury, fluid gallium metal wets glass and skin, alongside most different materials, making it precisely more hard to deal with despite the fact that it is generously less poisonous and needs far less precautionary measures