Which of the following groups of elements are mobile?

Fe, Ca, B

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Mg, K

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B, K, N

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Ca, Mg, P

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Solution

The correct option is B Mg, K
Mobility of elements refers to their transportability within the plant.

Mobile nutrients are nitrogen in the form of nitrate, phosphorus (P) in the form of phosphate, potassium (K), magnesium (Mg), chlorine (Cl), zinc (Zn) and molybdenum (Mo). Calcium (Ca), sulfur (S), iron (Fe), boron (B) and copper (Cu) are immobile.

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C a, G e, M g, G a

K

Question 29
Can the following groups of elements be classified as Dobereiner’s triad?

(a) Na, Si, Cl

(b) Be, Mg, Ca

Atomic mass of Be 9; Na 23; Mg 24; Si 28; Cl 35; Ca 40. Explain by giving reason.

Which of the following elements would lose an electron easily?

(a) Mg (b) Na (c) K (d) Ca

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