[" Life without air would be "],[" (A) reductional."],[" (B) free from oxidative damage."],[" (C) impossible."],[" (D) anaerobic."]

[" The metal which can be purified "],[" by auto reduction or self reduction "],[" (A) "Fe],[" (B) "Zn],[" (C) "Cu],[" (D) "Al]

[" By which process "Pb" and "" Sn are extracted by "-],[" (A) Extracted carbon reduction: Self reduction "],[" (B) Self reduction: Carbon reduction "],[" (C) Electrolytic reduction: Cyanide process "],[" (D) Cynide process electrolytic reduction "]

(a) Carboxylation (b) Reduction (c) Regeneration (d) Evolution

Which of the following statements is correct regarding redox reactions ? (A)An increase in oxidation number of an element is called reduction (B)A decrease in oxidation number of an element is called oxidation. (C)A reagent which lowers the oxidation number of an element in a given substance is reductant. (D)A reagent which increases the oxidation number of an element in a given substance is reductant

"Life would be impossible without plants". Explain.

Which of the following is true for Photosynthesis ? (A) Reduction of CO_(2) and water. (B) Oxidation of CO_(2) and water. (C) Reduction of CO_(2) and oxidation of water. (D) Oxidation of CO_(2) and reduction of water.

Cannizaro reaction involves (A) oxidation of aldehyde (B) Reduction of aldehyde (C) oxidation as well as reduction of aldehyde (D) Re arrangement in aldehyde molecule

{:("LIST - 1","LIST - 2"),("A) "NH_(3),"1) Oxidant"),("B) "KMnO_(4),"2) Both oxidant and reductant"),("C) "SO_(2),"3) Neither oxidant nor reductant"),("D) "He,"4) Reductant"),(,"5) Dehydrating agent"):} The correct match is

Select the correct match {:("(A) Nirosomonas - Nitrite to nitrate"),("(B) Thiobacillus - Denitrification"),("(C) Nostoc - Free-living nitrogen-fixer"),("(D) Azotobacter - Anaerobic nitrogen-fixer"):}