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SubjectsScience
भौतिक और रासायनिक गुणधर्म
In this Class 10 Science topic from the chapter Metals and Non-metals, students learn how to distinguish physical properties from chemical properties and compare metals with non-metals. The topic covers lustre, hardness, malleability, ductility, sonority, conductivity, and melting points, along with chemical reactions involving oxygen, water, acids, and salts. Students also understand reactivity, the formation of ionic compounds, and how these properties explain the uses and behaviour of common elements.
TOPIC PRACTICE
Up to 5 questions from this page. Select your focus, then start.
Metals have free electrons. These electrons move easily to carry electric charge and also help transfer heat energy. Therefore, metals are generally good conductors of both heat and electricity. Options B and C are incomplete because metals generally show both types of conductivity. Exam tip: Copper and aluminium are common examples of conducting metals.
View question detailsSilver is the best electrical conductor because it has very low electrical resistance and its free electrons move easily. Copper is also an excellent conductor and is used more often in wires because it is cheaper, but its conductivity is lower than that of silver. Exam tip: Remember that silver ranks above copper in electrical conductivity.
View question detailsThe property by which a metal can be drawn into thin wires without breaking is called ductility. Copper and aluminium are ductile metals, so they are commonly used for electrical wires. Malleability refers to forming thin sheets by hammering, not drawing wires. Exam tip: associate wires with ductility and sheets with malleability.
View question detailsThe ability of a metal to be hammered into thin sheets without breaking is called malleability. Ductility is the ability to be drawn into wires, so it is a close but incorrect option. Exam tip: remember—sheets indicate malleability, while wires indicate ductility.
View question detailsMercury is liquid at room temperature because its melting point is about
ext{−39}^
ext{°C}, which is below normal room temperature. Iron, copper and aluminium have much higher melting points, so they remain solid at room temperature. Exam tip: Remember mercury as the metal that is liquid at room temperature.
QUIZ COMPLETE
