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Which of the following statements are incorrect regarding Group 16 elements:

(1)Oxygen and Sulphur are considered as non-metals.

(2)Selenium and tellurium are metals, while polonium is a metalloid.

(3)Down the group due to increase in atomic number, melting and boiling point also increases.

(4)The elements of Group 16 exhibit allotropy except oxygen and sulphur.

(5)There is a large difference exists between the melting and boiling points of oxygen and sulphur.

 

Option: 1

(1), (2) and (3)

 

 


Option: 2

(1), (3), (4) and (5)


Option: 3

(2), (4) and (5)

 


Option: 4

(2) and (4)


Answers (1)

best_answer

Correct option (d)

Oxygen and sulphur are non-metals, selenium and tellurium are metalloids, whereas polonium is a metal.Polonium is a radioactive and is short lived (Half life 13.8 days). Oxygen, sulphur, selenium, tellurium and polonium all these exhibit allotropy.Metal selenides and tellurides in sulphide ores are also found of selenium and tellurium.The existence of Polonium in nature is in the form of decay product of thorium and uranium minerals.

 

Posted by

Irshad Anwar

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