Gujarati
p-Block Elements - I
medium

Soft heavy metal melts at ${30\,^o}C$ and is used in making heat sensitive thermometers the metal is

A

Galium

B

Sodium

C

Potassium

D

Caesium

Solution

Gallium is a silvery, glass-like, soft metal. Its properties are close to the nonmetals in the periodic table and its metallic properties are not as metallic as most other metals. Solid gallium is brittle and is a poorer electrical conductor than lead. Gallium has the second largest liquid range of any element and is one of the few metals that is liquid near room temperature (m.pt. $29.76$), melting in the hand. So it is used in thermometer.

Standard 11
Chemistry

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