Ans. The property of metals by which they can be beaten into thin sheets is called malleability.
Ans. The property of metal by which it can be drawn into wires is called ductility.
Ans. The name of the product formed in the reaction of sulphur and oxygen is sulphur dioxide gas.
Ans. It is acidic in nature. Generally, oxides of non-metals are acidic in nature.
Ans. Elements which possess characters of both metals and non-metals are called metalloids.
Ans. On burning, metals react with oxygen to produce metal oxides which are basic in nature.
Ans. Mercury is the only metal which is found in liquid state at room temperature.
Ans. Rust i.e. Iron oxide (Fe2O3) is basic in nature. In general, metallic oxides are basic in nature.
Ans. Non-metals react with oxygen to produce non- metallic oxides which are acidic in nature.
Ans. Aluminium foils are used to wrap food items because aluminium metal is malleable. Thus, it can be beaten into thin sheets.
Ans. Metals are used in making machinery, automobiles, aeroplanes, trains, satellites, industrial gadgets, cooking utensils, water boilers, etc.
Ans. Some metals react with water to produce metal hydroxides and hydrogen gas. Generally, nonmetals do not react with water.
Ans. In displacement reaction a more reactive metal can replace a less reactive metal, but a less reactive one cannot replace a more reactive metal.
Ans. Metals are hard, lustrous, malleable, ductile, sonorous and good conductors of heat and electricity.
Ans. Sodium and potassium are stored in kerosene because they react vigorously with oxygen and water.
Ans. Screw driver handle is either made up of wood or plastic because they are bad conductors of heat and electricity.
Ans. Bells are made of metal because they are sonorous. The things made of metals produce ringing sound when struck hard.
Ans. Non-metals generally do not react with acids but metals react with acids and produce hydrogen gas that burns with a ‘pop’ sound.
Ans. Immersion rods for heating liquids are made up of metallic substances because metals are good conductors of heat and electricity.
Ans. This is so because coal and pencil are non-metal and they are not malleable.
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