Tag: group 16 elements - trends in chemical properties

Questions Related to group 16 elements - trends in chemical properties

Name of the group-16 element which shows maximum catenation.

chemistry p- block elements-ii group 16 elements - general properties group 16 elements - trends in chemical properties group 16 elements

  1. Oxygen

  2. Sulphur

  3. Selenium

  4. Tellurium

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Correct Option: B
Explanation:

The greater the element-element bond strength, the higher is the tendency towards catenation. 

As the size increases from S to Te, the bond dissociation energy decreases. O - O bond energy is, however, smaller than that of S-S because of inter electronic repulsions within the smaller size of oxygen atoms. 

Thus, sulphur has a maximum tendency towards catenation.

In 16 group element, sulphur, selenium and tellurium are respectively :

chemistry p- block elements-ii group 16 elements - general properties group 16 elements - trends in chemical properties group 16 elements

  1. Insulator, Semiconductors and Semiconductor.

  2. Semiconductors , Insulator and Insulator.

  3. Insulator, Insulator and Semiconductor.

  4. Semiconductors, Insulator and Semiconductor.

Show answer
Correct Option: A
Explanation:
 Sulphur is non metal.It has the properties of poor conductor of both heat and electricity.It is weak,dull and can be easily breakable.

As we  move from top to bottom in  group the conductivity of elements increases so the sulfur, selenium  and tellurium are Insulator, Semiconductors and Semiconductors respectively.

Hence option A is correct.

Which of the following bonds has the highest energy?

chemistry p- block elements-ii group 16 elements - general properties group 16 elements - trends in chemical properties group 16 elements

  1. Se-Se

  2. Te-Te

  3. S-S

  4. O-O

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Correct Option: C
Explanation:

Due to lower size and less electron-electron repulsion, S-S have highest bond energy.

An element X forms an oxide $XO _3$. What is the valency of X?

chemistry p- block elements-ii group 16 elements - general properties group 16 elements - trends in chemical properties group 16 elements

  1. 1

  2. 2

  3. 3

  4. 6

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Correct Option: D
Explanation:

Valency of Oxygen is 2

The colour of mercuric oxide is:

chemistry p- block elements-ii group 16 elements - general properties group 16 elements - trends in chemical properties group 16 elements

  1. blue

  2. pink

  3. red

  4. black

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Correct Option: C
Explanation:

Mercuric chloride is red in colour.

As many as ______ different combinations of water are possible from $H _1^1, H _1^2, H _1^3, O _8^{16}, O _8^{17}, O _8^{17}$ ?

chemistry p- block elements-ii group 16 elements - general properties group 16 elements - trends in chemical properties group 16 elements

  1. $16$

  2. $5$

  3. $18$

  4. $24$

Show answer
Correct Option: C
Explanation:

Different combinations can be used in the preparation of water. Using these isotopes, a total of 18 combinations are possible. At first it might seem that kinds of water with the chemical structure $H _2O$ based on isotope differences only, are 9 in number:

$H^1 _2O^{16}, H^2 _2O^{16}, H^3 _2O^{16},$
$H^1 _2O^{17},H^2 _2O _{17},H^3 _2O^{17},$
$H^1 _2O^{17}, H^2 _2O^{18}, and H^3 _2O^{18}$

However, there are actually 18 differing isotope kinds of water. This is because each of the two hydrogen atoms in a particular molecule can be a different isotope, giving these 9 additional varieties of water:

$H^1H^2O^{16}, H^1H^3O^{16}, H^2H^3O^{16},$
$H^1H^2O^{17}, H^1H^3O^{17}, H^2H^3O^{17},$
$H^1H^2O^{18}, H^1H^3O^{18}, and H^2H^3O^{18}$

Assertion: Dinegative anion of oxygen $(O^{2-})$ is quite common but dinegative anion of sulfur $(S^{2-})$ is less common.

Reason: Covalency of oxygen is two.

chemistry p- block elements-ii group 16 elements - general properties group 16 elements - trends in chemical properties group 16 elements

  1. If both assertion and reason are true and the reason is a correct explanation of the assertion

  2. If both assertion and reason are true but reason is not a correct explanation of the assertion

  3. If the assertion is true but reason is false.

  4. If both the assertion and reason are false

  5. If the assertion is false but the reason is true

Show answer
Correct Option: B
Explanation:

Usually, oxygen forms 2 bonds. So the covalency of oxygen is 2 as in $H _2O$. 


Oxygen is the second most electronegative element after fluorine. So, it can easily gain electrons to form dinegative anion ($O^{2-}$) while sulphur is not so electronegative element as oxygen.

Therefore dinegative anion of oxygen is common because of high electron gain enthalpy.

All the elements of oxygen family are:

chemistry p- block elements-ii group 16 elements - general properties group 16 elements - trends in chemical properties group 16 elements

  1. non-metals

  2. metalloid

  3. radioactive

  4. polymorphic

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Correct Option: A,D
Explanation:

All the elements of oxygen family exist in more than one form (polymorphic).

The allotrope of this element is the primary absorber of UV solar radiation in Earth's atmosphere. The element is:

chemistry p- block elements-ii group 16 elements - general properties group 16 elements - trends in chemical properties group 16 elements

  1. carbon

  2. nitrogen

  3. oxygen

  4. neon

  5. argon

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Correct Option: C
Explanation:

Allotrope of oxygen which is known as ozone, is the primary absorber of UV radiation in arth's atmosphere.

All the elements in oxygen family are:

chemistry p- block elements-ii group 16 elements - general properties group 16 elements - trends in chemical properties group 16 elements

  1. Non-metal

  2. Mettaloids

  3. Radioactive

  4. Polymorphic

Show answer
Correct Option: D
Explanation:

All the elements in oxygen family are polymorphic (Polymorphism is the ability a material to exist in two or more forms or crystalline structures of the same chemical compound or element).
Hence option D is correct.