Tag: p- block elements-ii

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Questions Related to p- block elements-ii

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

A group 16 element exists in the monoatomic state in the metallic lattices. It also exists in two crystalline forms. The metal is:

  1. Po

  2. S

  3. Se

  4. Te
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

polonium has two metallic allotropes, the $\alpha $ atom has the simple cubic structure in a single atom basis at STP and $\beta $ atom of it has rhombohedral structure. Po belongs to group 16.

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

Arrange the following elements in order of their increasing ionisation energies $O, S, Se, Te, Po$ :

  1. $Se, Te, S, Po, O$
  2. $O, S, Se, Te, Po$
  3. $Po, Te, Se, S, O$
  4. $Te, O, S, Po, Se$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Ionisation energy decreases from top to bottom in a group. So increasing order will be
Po < Te < Se < S < O

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

Which is the following order is INCORRECT?

  1. ${ Na } _{ 2 }O<{ SiO } _{ 2 }<{ Cl } _{ 2 }{ O } _{ 7 }$ Acidic character order
  2. ${ PH } _{ 3 }<{ AsH } _{ 3 }<{ SbH } _{ 3 }$ basic character order
  3. ${ PH } _{ 3 }<{ AsH } _{ 3 }={ SbH } _{ 3 }$ acidic character order
  4. $I{ EA } _{ 1 }$>$I{ EA } _{ 2 }$>$I{ EA } _{ 1 }$ Successive electron affinity order.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The basic character of hydrides of group 15 elements decreases down the group (NH3 > PH3 > AsH3 > SbH3) because the lone pair becomes more diffuse. Thus, the order PH3 < AsH3 < SbH3 is incorrect.

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

Group $16$ element are called:

  1. Carbon family

  2. Chalcogen family

  3. Halogen family

  4. Nitrogen family
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
The chalcogens are the chemical elements in the group $16$ of the periodic table. 

This group is also known as the oxygen family. It consists of the elements oxygen, sulfur, selenium, tellurium, and the radioactive element polonium. 

Hence, the correct answer is option $B$.
Multiple choice chemistry p- block elements-ii group 16 elements - general properties group 16 elements - trends in chemical properties group 16 elements

The element with highest boiling point in the following is :

  1. Oxygen

  2. Sulphur

  3. Tellurium

  4. Polonium
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Boiling point is a physical property so depends on van der waal forces of attraction and van der waal forces $\propto$ molecular mass $\propto$ High boiling point
$\therefore $ Boiling point order :- $Te > Se > S > O$

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

Which of the following is a true Chalcogen:

  1. Nitrogen

  2. Oxygen

  3. Polonium

  4. Chlorine
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation


Chalcogen is VI group (Oxygen family)
having elements:-
                 O
                  S
                  Se
                   Te
                    Po