Pick the odd word out of the following: lead, arsenic, chlorine, cadmium, mercury, nickel.

Lead

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Chlorine

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Cadmium

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Nickel

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Solution

The correct option is B
Chlorine

Chlorine is a non-metal and is used in water purification but all others are toxic metals. These "heavy metals," are individual metals and metal compounds that negatively affect the health of people.

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Similar questions

(i)	Mercury	(a)	Low blood pressure, blindness
(ii)	Lead	(b)	Hyperkeratosis, liver cirrhosis
(iii)	Arsenic	(c)	Bone deformation, testicular dystrophy
(iv)	Cadmium	(d)	Abdominal pain, haemolysis
		(e)	Anaemia, convulsions

Some of the batteries are rechargeable :

I : Dry cell battery

II : Lead-storage (acid) battery

III : Nickel-cadmium battery

IV : Lithium battery

V : Fuel cell

Select correct alternates :

What is a Nickel-Cadmium storage cell?

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