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Deficiency of Nutrients

Which of the ...

Question

Which of the following are micronutrients?

Fe, Zn, B, Cl and Ni

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Fe, Zn, B, Cl and Na

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Fe, Zn, B, Co and Ni

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Fe, Zn, Si, Cl and Ni

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Solution

The correct option is A Fe, Zn, B, Cl and Ni
Based on their quantitative requirements, plant nutrients are divided into:

(i) Macronutrients: They are generally present in large amounts (more than 10 mmole/kg of dry matter).
Examples: C, H, O, N, P, S, K, Ca and Mg.

(ii) Micronutrients: They are needed in very small amount (less than 10 mmole/kg of dry matter).
Examples: Fe, Mn, Cu, Mo, Zn, B, Cl and Ni.

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Similar questions

Given the standard reduction potentials:

Zn²⁺/Zn = - 0.74 V, Cl₂/Cl^- = 1.36 V, H⁺/1/2H₂ = 0 V and Fe³⁺/Fe²⁺ = 0.77 V.
The order of increasing strength as reducing agent is

Q. Which of the comparison regarding

Z n, C d, H g

is/are correct?

(I)

Z n {C l}_{2}

is ionic whereas

C d {C l}_{2}

and

H g {C l}_{2}

are covalent.

(II)

Z n

and

C d

dissolves in dilute acid

(H C l)

liberating

H_{2}

whereas

H g

do not.

(III)

Z n

and

C d

forms precipitate of

Z n (O H)_{2}

and

C d {(O H)}_{2}

but

H g

forms coloured precipitate of

H g (O H)_{2}

(IV) All forms

A_{2}^{2 +}

type ion.

In the reaction Zn +2 $H^{+}$ +2 $C l^{-}$ $⟶$ $Z n^{+} 2$ + 2 $C l^{-}$ + $H_{2}$ the spectator ion

$Z n + 2 H^{+} + 2 C l^{-} - - - - - - - > Z n^{2 +} + 2 C l^{-} + H_{2}$

1) Zn + 2HCl ----> Zn Cl2 + H2

Z n (s) + C u {C l}_{2} (a q) \to Z n {C l}_{2} (a q) + C u (s)

In the reaction shown above, which substance is reduced?

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