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Which element when supplied in excess le...

Which element when supplied in excess leads, to appearence of brown spots surrounded by chlorotic venis ?

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Magnesium
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In order to maintain soil fertility , it is necessary to add containing nitrogen , phosphorous and potassium in the form of manures. Manures are two type they are a ) Natural and b) Artificial , Artifical manures are chemical compounds obtained by artificial mean containing N,P or K. These chemical compounds are generally called fertilizers. The chemical substance which are added to the soil as to make up the deficiency of essential elements are called fertilizers. Every chemical compounds of N,P , & K can be used as fertilizer and it must have chracteristic properties. Fertilizers are classified according to the element (N,P or K) which they are supplied to the soild. Super phosphate of lime is obtained by treating

Walls of stomach secrets acids to make the stomach acidic and for the digestion of food, when the acid is secreted in excess it leads to indigestion, heart burn, (or) gastric ulcers. The chemicals which are used to neutralize the excess acid present in the gastric juice and to raise the pH of stomach upto an appropriate level are called antacids. Which acts as natural antacid ?

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Oxidation number is the charge which an atom of an element has in its ion or appears to have when present in the combined state. It is also called oxidation state. Oxidation number of any atom in the elementary state is zero. Oxidation number of a monoatomic ion is equal to the charge on it. In compounds of metals with non metals, metals have positive oxidation number while non metals have negative oxidation numbers. In compounds of two difference elements, the more electronegative element has negative oxidation number whereas the other has positive oxidation number. In complex ions, the sum of the oxidation number of all the atoms is equal to the charge on the ion. If a compound contains two or more atoms of the same element, they may have same or different oxidation states according as their chemical bonding is same or different. The oxidation state of the most electronegative element in the products of the reaction between BaO_(2) and H_(2)SO_(4) are

Oxidation number is the charge which an atom of an element has in its ion or appears to have when present in the combined state. It is also called oxidation state. Oxidation number of any atom in the elementary state is zero. Oxidation number of a monoatomic ion is equal to the charge on it. In compounds of metals with non metals, metals have positive oxidation number while non metals have negative oxidation numbers. In compounds of two difference elements, the more electronegative element has negative oxidation number whereas the other has positive oxidation number. In complex ions, the sum of the oxidation number of all the atoms is equal to the charge on the ion. If a compound contains two or more atoms of the same element, they may have same or different oxidation states according as their chemical bonding is same or different. A compound of Xe and F is found to have 53.3% Xe (atomic weight =133). Oxidation number of Xe in this compound is

VIKRAM PUBLICATION ( ANDHRA PUBLICATION)-MINERAL NUTRITION -EXERCISES
  1. Which element is required for the formation of mitotic spidle ?

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  2. What is the role of sulphur in plant life ?

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  3. The micro essential mineral element which has been reported recently i...

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  4. Which element is necessary for the synthesis of the chief photosynthet...

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  5. What is photolysis of water ?

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  6. Which enzyme is activated by the 17th essential element ?

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  7. When is an element considered to be toxic ?

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  8. Which element when supplied in excess leads, to appearence of brown sp...

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  9. Name an anaerobic, free living, photo-hetrotrophic nitrogen fixing bac...

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  10. Which aquatic fern performs nitrogen fixation ?

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  11. Explain the role of the pink colour pigment in the root nodule of legu...

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  12. Apart from the cortical cells, which other cells are stimulated to div...

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  13. Which of the following can fix atmospheric nitrogen ?

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  14. What acts as oxygen scavenger in the legume - root nodule combination ...

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  15. In what why does aspargine differ from aspartic acid ?

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  16. Through which tissue the amino acids are transported inside the plant ...

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  17. Plants like the Pitcher and Venus fly trap have special nutritional ad...

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  18. Excess of maganese induce the deficiency of

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  19. What acts as a reservoir of essential elements for plants ? By what pr...

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  20. Fixation of nitrogen is a source for

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