Give reasons : Aluminium is a highly reactive metal, yet it is used to make utensils for cooki

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3. Metals and Non-metals

medium

Give reasons : Aluminium is a highly reactive metal, yet it is used to make utensils for cooking.

Option A

Option B

Option C

Option D

Solution

Though aluminium is a highly reactive metal, it is resistant to corrosion. This is because aluminium reacts with oxygen present in air to form a thin layer of aluminium oxide. This oxide layer is very stable and prevents further reaction of aluminium with oxygen. Also, it is light in weight and a good conductor of heat. Hence, it is used to make cooking utensils.

Standard 10

Science

You are given a hammer, a battery, a bulb, wires and a switch.

$(a)$ How could you use them to distinguish between samples of metals and non-metals ?

$(b)$ Assess the usefulness of these tests in distinguishing between metals and non-metals.

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Samples of four metals $A$, $B$, $C$ and $D$ were taken and added to the following solution one by one. The results obtained have been tabulated as follows.

Metal Iron $(II)$ sulphate Cooper $(II)$ sulphate zinc sulphate Silver nitrate

$A.$ No reaction Displacement

$B.$ Displacement No reaction

$C.$ No reaction No reaction No reaction Displacement

$D.$ No reaction No reaction No reaction No reaction

Use the Table above to answer the following questions about metals $A$, $B$, $C$ and $D$.

$(i)$ Which is the most reactive metal ?

$(ii)$ What would you observe if $B$ is added to a solution of Copper $(II)$ sulphate ?

$(iii)$ Arrange the metals $A$, $B$, $C$ and $D$ in the order of decreasing reactivity.

hard

Give reasons why copper is used to make hot water tanks and not steel (an alloy of iron).

medium

What type of oxides are formed when non-metals combine with oxygen?

easy

Give an example of a metal which

$(i)$ is a liquid at room temperature.

$(ii)$ can be easily cut with a knife.

$(iii)$ is the best conductor of heat.

$(iv)$ is a poor conduct of heat.

medium

Metal	Iron $(II)$ sulphate	Cooper $(II)$ sulphate	zinc sulphate	Silver nitrate
$A.$	No reaction	Displacement
$B.$	Displacement		No reaction
$C.$	No reaction	No reaction	No reaction	Displacement
$D.$	No reaction	No reaction	No reaction	No reaction

Give reasons : Aluminium is a highly reactive metal, yet it is used to make utensils for cooking.

Solution

Similar Questions

You are given a hammer, a battery, a bulb, wires and a switch. $(a)$ How could you use them to distinguish between samples of metals and non-metals ? $(b)$ Assess the usefulness of these tests in distinguishing between metals and non-metals.

Give reasons why copper is used to make hot water tanks and not steel (an alloy of iron).

What type of oxides are formed when non-metals combine with oxygen?

Give an example of a metal which $(i)$ is a liquid at room temperature. $(ii)$ can be easily cut with a knife. $(iii)$ is the best conductor of heat. $(iv)$ is a poor conduct of heat.

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You are given a hammer, a battery, a bulb, wires and a switch.

$(a)$ How could you use them to distinguish between samples of metals and non-metals ?

$(b)$ Assess the usefulness of these tests in distinguishing between metals and non-metals.

Give an example of a metal which

$(i)$ is a liquid at room temperature.

$(ii)$ can be easily cut with a knife.

$(iii)$ is the best conductor of heat.

$(iv)$ is a poor conduct of heat.