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The deficiencies of micronutrients, not ...

The deficiencies of micronutrients, not only affects growth of plants but also vital function such as photosynthesis and mitrochondria electron flow. Among the list given below, which group of three elements shall affect most, both photosynthesis and mitrochondrial electron transport ?

A

Co, Ni, Mo

B

Ca, K, Na

C

Mn, Co, Ca

D

Cu, Mn, Fe

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The correct Answer is:
D
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The products of bond breaking, shown below, are not stable, and cannot be isolated for prolonged study. Such species are referred to as reactive intermediate, and are belived to be transient intermediates in many reactions. The general structures and names of four such intermediates are, Charged Intermediates Uncharged Intermediates Carbocations (called carbonium ions in the older literature) are electrophiles and carbananions are nucleophiles. Carbenes have only a valence shell sextet of electrons and are therefore electron deficient. In this sense they are elecrophiles, but the non-bonding electron pair also gives carbenes nucleophilic character. As a rule, the electrophilic character dominates carbene reactivity. Carbon radicals have only seven valence electrons, and may be considered electron deficient, however, they do not in general bond to nucleophilic electron pair, so their chemistry exhibits differences from that of conventional electrophiles. Radical intermediates are often called free radicals. Intermediates are in general stabilised with conjugation, electron donating and electron with drawing groups. R-N^(+) equiv N" "Cl^(-) rarr R^(+)+N_(2)+Cl^(-) based on the above, which of the following from R^(+) most readily

The products of bond breaking, shown below, are not stable, and cannot be isolated for prolonged study. Such species are referred to as reactive intermediate, and are belived to be transient intermediates in many reactions. The general structures and names of four such intermediates are, Charged Intermediates Uncharged Intermediates Carbocations (called carbonium ions in the older literature) are electrophiles and carbananions are nucleophiles. Carbenes have only a valence shell sextet of electrons and are therefore electron deficient. In this sense they are elecrophiles, but the non-bonding electron pair also gives carbenes nucleophilic character. As a rule, the electrophilic character dominates carbene reactivity. Carbon radicals have only seven valence electrons, and may be considered electron deficient, however, they do not in general bond to nucleophilic electron pair, so their chemistry exhibits differences from that of conventional electrophiles. Radical intermediates are often called free radicals. Intermediates are in general stabilised with conjugation, electron donating and electron with drawing groups. R-N^(+) equiv N" "Cl^(-) rarr R^(+)+N_(2)+Cl^(-) based on the above, which of the following from R^(+) most readily

AAKASH SERIES-MINERAL NUTRITION-Exercise - III
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  5. A free living, nitrogen-fixing cyanobacterium which can also form symb...

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  8. Which one of the following mineral elements plays an important role in...

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  10. Boron in green plants assists in

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  11. Grey speck of Oats' caused by the deficiency of

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  12. The major protion of the dry weight of plants comprises of

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  13. Choose the correct match Bladderwort sundew, vensufly trap

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  14. The plants grown in magnesium deficient but urea sprayed soil would sh...

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  15. Passive absorption of minerals depend on

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  16. Enzyme involved in nitrogen fixation

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  17. In plants inulin and pectin are

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  18. Which aquatic fern performs nitrogen fixation ?

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  19. Zinc as a nutrient is used by the plants in the form of

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  20. Which of the following is a free living aerobic non-photosynthetic nit...

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