Plants extract phosphate from the soil A) by converting it to the dihydrogen pho

Question

Plants extract phosphate from the soil A) by converting it to the dihydrogen phosphate ion by addition of acid to the soil near roots. B) by converting it to phosphoric acid. C) by osmosis. D) by leaching. E) by fixation. Which of the following reactions is a good small-scale laboratory method for preparation of hydrogen? A) CH_4(g) + H_2O(g) CO(g) + 3H_2(g) B) 3FeCl_2(s) + 4H_2O(g) Fe_3O_4(s) + 6HCl(g) + H_2(g) C) NaH(s) + H_2O(l) NaOH(aq) + H_2(g) D) CO(g) + H_2O(g) CO_2 + H_2(g) E) None of the above methods is useful. The main end use of sulfuric acid is A) manufacture of iron and steel B) processing of petroleum. C) production of fertilizers D) production of explosives. E) production of various other chemicals. Briefly describe the three main pathways for nitrogen fixation.

Explanation / Answer

Ans.9- (B)

Ans 10- (C) , not hazardeous, not harmful

Ans 11- (C) production of fertilizers

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