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Classification of Essential Elements

Which of the ...

Question

Which of the following is a group of trace elements?

A

Mo, Mn, Zn, Cu

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B

Mo, Zn, Mn, Mg

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C

Mg, Mn, Co, Zn

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D

Mn, Mg, Zn

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Solution

The correct option is C Mo, Mn, Zn, Cu
Minerals essential for plants can be grouped into two categories macroelements and microelements. The microelements are the trace elements which are required in small amounts only. For example, molybdenum, manganese, zinc, copper etc.
Thus, the correct answer is option A.

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Similar questions

Q. Which of these is the correct group reagent for

M n^{2 +}, C o^{2 +}, Z n^{2 +} & N i^{2 +}

Q. Different solutions containing

M n S, F e S, Z n S a n d H g S

have the following concentrations :

0.01 M

concentration of each

M n^{2 +}, F e^{2 +}, Z n^{2 +}

H g^{2 +}

[S^{2 -}] = 10^{- 8} M

K_{s p}

M n S, F e S, Z n S a n d H g S

10^{- 14}, 10^{- 19}, 10^{- 25}

10^{- 54}

respectively.
Which of the following statements are correct?

Q. Short / Long answer type questions
Why are the elements Mn, Zn, B, Cu, and MO referred to as trace elements?

Q. A solution which is

10^{- 3} N

M n^{2 +}, F e^{2 +}, Z n^{2 +}

H g^{2 +}

is treated with

10^{- 16} M

sulphide ion. If

K_{s p}

M n S, F e S, Z n S

H g S

10^{- 15}, 10^{- 23}, 10^{- 20}

10^{- 54}

respectively, which one will precipitate first ?

Z n^{2 +}

is diamagnetic whereas

M n^{2 +}

is paaramagnetic?

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