Tag: physical properties of metals and non-metals

Questions Related to physical properties of metals and non-metals

Metallic lustre is explained by :

chemistry metals physical properties of metals and non-metals some physical properties of metals general characteristics and uses of metals

  1. oscillation of loose electrons 

  2. diffusion of metal ions

  3. excitation of free protons

  4. existence of B.C.C. lattice

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Correct Option: A
Explanation:

The metallic lustre of a metal is due to the oscillation of loosely bound electrons.


When light falls upon the electrons, they absorb energy and are set into oscillation, and they emit radiations which are responsible for the metallic lustre.

Hence, te correct option is $\text{A}$

Which among the following elements is not lustrous?

chemistry metals physical properties of metals and non-metals some physical properties of metals general characteristics and uses of metals

  1. Cooper

  2. Gold

  3. Iron

  4. Iodine

  5. None of these

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Correct Option: E

Arrange the following in increasing order of solubility in $H _2O$.


$AgCl,\  AgBr,\ AgI,\ AgF$

chemistry metals physical properties of metals and non-metals some physical properties of metals general characteristics and uses of metals

  1. $AgI < AgBr < AgCl < AgF$

  2. $AgI < AgBr < AgF < AgCl$

  3. $AgI < ACl < AgBr < AgF$

  4. None of these

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Correct Option: A
Explanation:

Solubility in water depends on the size. Smaller is the size of the anion, more it is solvated and more is the solubility.


AgI < AgBr  < AgCl < AgF

Arrange the following in increasing order of solubility in $H _2O$?

$NaF, MgO, AlN$

chemistry metals physical properties of metals and non-metals some physical properties of metals general characteristics and uses of metals

  1. $AlN < MgO < NaF$

  2. $MgO < AIN < NaF$

  3. $AlN < NaF < MgO$

  4. None of these

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Correct Option: A
Explanation:

More the charge on the ions, more is the covalent character. Hence, the order of covalent charcter is $AlN  > MgO > NaF$. More is the covalent character, less is the solubility in water.

The order of solubility in water is $AlN < MgO < NaF$.

Choose the most elastic substance from the following option.

chemistry metals physical properties of metals and non-metals some physical properties of metals general characteristics and uses of metals

  1. Rubber

  2. Nylon

  3. Steel

  4. Iron

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Correct Option: C
Explanation:

Elasticity is the property of solid materials to return to their original shape and size after the forces deforming them have been removed.


Steel is more elastic than any other thing because steel comes back to its original shape faster than rubber when the deforming forces are removed.

Hence, option C is correct.

A piece of steel has a volume of 12 cm$^{3}$ and a mass of 96 g. Find its density in kg/m$^{3}$.

Density $= x \times 10^3\ kg/m^3$. What is the value of $x$?

chemistry metals physical properties of metals and non-metals some physical properties of metals general characteristics and uses of metals

  1. 9

  2. 10

  3. 11

  4. 8

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Correct Option: D
Explanation:

We have, $1\ cm^3 = 10^{-6}\ m^3$


So, $12\ cm^3 = 12\times10^{-6} m^3$


Again, $1\ g = 10^{-3}\ kg$

So, $96 \ g = 96\times 10^{-3} \ kg$

Therefore, density $=\dfrac{mass}{volume}=\dfrac{96\times 10^{-3}}{12\times 10^{-6}} = 8\times 10^3\ kg/m^3$ 

 
 Hence option D is the correct answer.

The metal with the lowest density is :

chemistry metals physical properties of metals and non-metals some physical properties of metals general characteristics and uses of metals

  1. $Mg$

  2. $Li$

  3. $Ag$

  4. $Au$

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Correct Option: B
Explanation:

Under standard conditions, lithium is the lightest metal and the least dense solid element. It is a soft, silver-white metal belonging to the alkali metal group of chemical elements.

Which of the following metal is present in native state?

chemistry metals physical properties of metals and non-metals some physical properties of metals general characteristics and uses of metals

  1. platinum

  2. iron

  3. potassium

  4. copper

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Correct Option: A
Explanation:

Very few metals exist in the free or native state. Only metals like gold, platinum and mercury are occasionally found in the free state i.e in the pure form.

Metals tends to form:

chemistry metals physical properties of metals and non-metals some physical properties of metals general characteristics and uses of metals

  1. cations

  2. anions

  3. cations and anions

  4. do not form ions

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Correct Option: A
Explanation:

Metals have low ionization enthalpy value and as a result of which they have a high tendency to donate the electrons and achieve inert configuration,

Because of their high electron-donating tendency, they are the strong reducing agent

$M \rightarrow M^{n+} + ne^-$

After the donation of electrons, metal gets a positive charge and the species having a positive charge are known as cations.

Hence, Metals tends to form cations.

Hence, te correct option is $\text{A}$

State True or False.
All metals are solids.

chemistry metals physical properties of metals and non-metals some physical properties of metals general characteristics and uses of metals

  1. True

  2. False

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Correct Option: B
Explanation:

The given statement is false as mercury,gallium and caesium are liquids at room temperature.