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Assertion: Gastrectomy can lead to iron-...

Assertion: Gastrectomy can lead to iron-deficiency or anaemia.
Reason: HCl of gastric juice converts `Fe^(3+)` into `Fe^(2+)` which makes iron absorbabale.

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Assertion. The total content of iron in an adult body is 3.5 gram. The iron deficiency lead to anaemis. Reason. Iron (Fe^(2+)) combines with the pigment porphyrin to form heme.

Assertion (A) : Galvanized iron does not rust. Reason (R): Zn has a more negative electrode potential than Fe .

Assertion : Fe^(+3) is not valid for Brown Ring Test. Reason : BeCause NO_(3)^(-) first convert into NO_(2)^(-)

Assertion: Phosphorus cycle is an imperfect cycle as a sufficient amount of phosphorus combines with Al^(3+) Fe^(2+) and Ca^(2+) to form insoluble and unavailable salts. Reason: Phosphate circulation in abiotic environment in lithosphere as well as in atmosphere.

The valency of iron in Fe_2O_3 is

A 3.00 g sample containing Fe_(3)O_(4), Fe_(2)O_(3) and an inert impure substance, is treated with excess of KI solution in presence of dilute H_(2)SO_(4) . The entire iron is converted into Fe^(2+) along with the liberation of iodine. The resulting solution is diluted to 100 mL. A 20 mL of the dilute solution requires 11.0 mL of 0.5 M Na_(2)S_(2)O_(3) solution to reduce the iodine, present. A 50 mL of the dilute solution after complete extraction of the iodine required 12.80 mL of 0.25 M KMnO_(4) solution in dilute H_(2)SO_(4) medium for the oxidation of Fe^(2+) . Calculate the % of Fe_(2)O_(3) "and" Fe_(3)O_(4) in the original sample.

Assertion : Hydrochloric acid is not used to acidify a KMnO_(4) solution in volumetric analysis of Fe^(2+) and C_(2) O_(4)^(2-) because. Reason : Part of the oxygen produced from KMnO_(4) and HCl is used up in oxidising HCl to Cl_(2) .

Assertion (A) : Galvanized iron is protected from Rusting. Reason (R): Zn is less reactive than Fe . (a)If both (A) and (R) are correct, and (R) is the correct explanation of (A) . (b)If both (A) and (R) are correct, but (R) is not the correct explanation of (A) . (c)If (A) is correct, but (R) is incorrect. (d)If (A) is incorrect, (R) is correct.

Assertion (A) : Fe^(3+) (g) ion is more stable than Fe^(2+)(g) ion. Reason (R) : Fe^(3+) ion has more number of unpaired electrons than Fe^(2+) ion.

Assertion: [Fe(EDTA)]^(-) complex is octahedral in shape. Reason: EDTA is a hexadentate ligand and undergoing sp^(3)d^(2) hybridisation.

CENGAGE BIOLOGY ENGLISH-DIGESTION AND ABSORPTION -ARCHIVES
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