metals and non-metals ch 3 ncert class 10

what is lustre

• metallic shine

• brittleness

• can be beaten into thin sheets

• can be drawn into wires

which of these are properties of non-metals?

• form basic oxides

• are brittle

• are electron gainers

• are mostly solid and gas

metal+oxygen=

copper(II) oxide is

• black in colour

• yellow in colour

• grey in colour

_____________ is a process of forming of thick oxide layer of aluminium.

which of these are amphoteric oxides?

• aluminium oxide

• lithium oxide

• zinc oxide

• magnesium oxide

which of these metals is liquid in room temperature?

• Hg

• Ga

• Ni

• Cs

which of these is the formula for sodium aluminate

• NaOAl₂

• NaO₂Al₃

• NaAlO₂

• NaAlO₃

Which of these react violently with cold water?

• potassium

• calcium

• zinc

• copper

• sodium

which pair of metals do not react with water at all?

• copper and aluminium

• silver and zinc

• gold and lead

• aluminium and ferrous