The metal which is an important constituent of limestone?

K

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N a

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M g

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C a

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Solution

The correct option is D $C a$
Limestone has formula $C a C O_{3}$ . Hence calcium is present in this. Limestone is a sedimentary rock composed largely of the minerals calcite and aragonite, which are different crystal forms of calcium carbonate. Hence answer is calcium.

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Question 40
Identify the elements with the following property and arrange them in increasing order of their reactivity:

(a) An element which is a soft and a reactive metal.

(b) The metal which is an important constituent of limestone.

N a, K, C a

M g

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