An element with variable (more than one) valency and stored under water, is :

phosphorous

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arsenic

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sulphur

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sodium

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Solution

The correct option is A phosphorous
Phosphorous has valency which is variable 3 and 5 belonging to group 15 and period 3. Phosphorous is only slightly soluble in water and it is stored under water.It is soluble in benzene, oils, carbon disulfide. It is highly reactive and spontaneously combusts when exposed to air. It is kept safe from self igniting when submerged in water.

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Similar questions

Question 41
Properties of the elements are given below. Where would you locate the following elements in the periodic table?

(a) A soft metal stored under kerosene.

(b) An element with variable (more than one) valency stored under water.

(d) An element which is an inert gas with atomic number 2.

(e) An element whose thin oxide layer is used to make other elements corrosion resistant by the process of “anodizing”.

(a) Explain the terms 'valency' and 'variable valency'.

(b) How are the elements with variable valency named ? Explain with an example.

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