Excess of Mn in soil leads to deficieny of Ca, Mg and Fe. Justify.

A farmer adds/ supplies Na, Ca, Mg and Fe regularly to his field and yet he observes that the plants show deficiency of Ca, Mg and Fe. Give a valid reason and suggest a way to help the farmer improve the growth of plants.

Name the following: An alloy of Ni, Cr, Mn and Fe.

Can improper kidney function lead to brittle bones? Justify your answer.

Excessive consumption of foods with added food colours leads to diseases like …………… .

For which of the following pairs, indicate which of the two species is of large size : Fe^(2+) or Fe^(3+) b. Mg^(2+) or Ca^(2+)

Read the following statements and justify the same in your own words with the help of suitable examples: Geographical and reproductive isoloation of organisms gradually leads to speciation.

Which of the following redox couple is stronger reducing agent ? a. Li (E^0 = -3.05 V) and Mg (E^0= -2.36 V) b. Zn (E^0 = -0.76 V) and Fe (E^0 = -0.44 V)

Answer the following questions: Arrange the following metals in the decreasing order of chemical reactivity: Cu, Mg, Fe,Ca, Zn, Na.