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Assertion (A): magnesium is not present ...

Assertion (A): magnesium is not present in enamel of human teeth.
Reason (R ): Magnesium is an essential elements for biological functions of human beings.

A

If both assertion and reason are true and the reason is the correct explanation of the assertion

B

If both assertion and reason are true but reason is nto the correct exaplation of the assertion

C

If assertion is true but reason is false

D

If the assertion and reason both are false

Text Solution

Verified by Experts

The correct Answer is:
B
Both assertion and reason are true but reason is not correct explanation of the assertion. Enamel the hardest substance of the body is composed of fluorine not magnesium. Magnesium is an essential element as it acts as a factor of many enzymes of glycolysis and a number of other metabolic reactions dependent upon ATP.
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ERRORLESS -S AND P BLOCK ELEMENTS-Ordinary thinking (Alkaline earth metals)
  1. Peroxide ion is present in :

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  2. Which gas is evolved by the treatment of magnesium with very dilute so...

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  3. A metal M readily forms its sulphate MSO(4) which is water soluble. It...

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  4. Which one of the following is the correct statement

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  5. Which of the following is the strongest base

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  6. Mg burns in CO to produce

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  7. Which of the following is formed when calcium combines with oxygen

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  8. Slow acting nitrogenous fertilizer among the following is

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  9. In the presence of cobalt chloride (CoCl2), bleaching powder decompose...

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  10. Bone ash contains

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  11. A metal is burnt in air and the ash on moistening smells of ammonia. T...

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  12. Alkaline earth metals belong to the

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  13. Phosphine, acetylene and ammonia can be formed by treating water with

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  14. H(2)SO(4) is added to 20% cold aqueous solution of "BaO"(2). The produ...

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  15. The fluorspar is

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  16. deep pink colour is given to flame by the salts of

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  17. Assertion: Magnesium continue to burn in nitric oxide. Reason : Duri...

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  18. Assertion: Anhydrous BaO(2)is used for preparing H(2)O(2). Reason : ...

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  19. Assertion: Barium is not required for normal biological function in hu...

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  20. Assertion (A): magnesium is not present in enamel of human teeth. Re...

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