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Test: Group-16 Elements - NEET MCQ


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Test: Group-16 Elements - Question 1

Group 16 elements have a lower value of first ionization enthalpy as compared to group 15 elements because:

Detailed Solution for Test: Group-16 Elements - Question 1

Group 16 elements have a lower value of first ionization enthalpy as compared to group 15 elements. As group 15 elements have half filled p-orbital due to which group 15 have got extra stability.

Test: Group-16 Elements - Question 2

Covalency of oxygen cannot exceed 2 unlike sulphur which can show +4 or +6 because

Detailed Solution for Test: Group-16 Elements - Question 2

Oxygen does not have a d-orbital thereby not exceeding its covalency beyond 2. Whereas sulphur has vacant d-orbitals hence can exceed its covalency to +4 or +6.

Test: Group-16 Elements - Question 3

Bond angle in H2​O(104.5) is higher than the bond angle of H2​S (92.1). The difference is due to:

Detailed Solution for Test: Group-16 Elements - Question 3

The difference in the bond angles is linked with the electronegativities of oxygen and sulphur atoms. As we move down the group from O to Te, the size of the central atom goes on increasing and its electronegativity goes on decreasing. 
As a result, the position of the two bond pairs shifts away and away from the central atom as we move from H2​O to H2​Te. Consequently, the repulsion between the bond pairs decreases as we move from H2​O to H2​Te and therefore, the bond angle decreases in the order.

Test: Group-16 Elements - Question 4

Arrange the following hydrides of group 16 elements in order of increasing stability:

Detailed Solution for Test: Group-16 Elements - Question 4

There is a decrease in bond enthalpy (H- E) the size of the element increases on moving down the group hence, the stability decreases on moving down group.

Test: Group-16 Elements - Question 5

The hybridisation of sulphur in sulphur tetrafluoride is:

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