Generally non-metals are non-lustrous. Name one non-metal which is lustrous.
IODINE
15
Name two metals which do not react with oxygen even at high temperature.
GOLD AND SILVER
15
When non-metals react with water then (a) Hydrogen gas is formed (b) Carbon dioxide gas is formed (c) Non-metals do not react with water (d) None of these.
Non-metals do not react with water
15
Metal oxides are of nature (a) Acidic(b) Basic(c) Neutral(d) All of these.
BASIC IN NATURE
15
The most reactive metal is: (a) Iron(b) Gold(c) Zinc(d) Potassium.
POTASSIUM
15
The liquid metal at room temperature (a) Mercury(b) Bromine(c) Sodium(d) Gold.
MERCURY
15
Composition of Duralumin
Al, Cu, Mg, Mn
15
Most popular use of German Silver
Tableware
15
Composition of Gun metal
Copper, Tin and Zinc
15
The metal which can be cut with a knife (a) Sodium and potassium(b) Barium and calcium (c) Sodium and mercury(d) Potassium and calcium.
SODIUM AND POTASSIUM
15
Define Malleability.
The property of metals by which they can be beaten into thin sheets is known as malleability.
15
Define Ductility.
It is one of the properties of metals by virtue of which they can be drawn into wires.
15
What happens when Iron (Fe) reacts with Oxygen and Moisture?
Formation of Rust
15
Define the term - ALLOY.
An alloy is a solid mixture of two or more metals or a metal and a non-metal.