The elements arsenic, copper and mercury have which of the following effect?
A
Catalytic effect
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B
pH effect
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C
Toxic effect
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D
Antagonastic action
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Solution
The correct option is C Toxic effect All the elements show toxic effect. Hg causes mercury poisoning. A common disease is Minamata disease which occurs due to high exposure to methylmercury. Similarly, intake of arsenic-rich water results in thickened and darker skin, abdominal pain, vomiting and even leads to cancer. Intake of high doses of Zn leads to vomiting, nausea, cramps etc.