34. In order for nitrogen to be used by most plants and all animals, it must be

Question

34. In order for nitrogen to be used by most plants and all animals, it must be (A) purified. (B) separated. (C) liquefied. (D) Fixed. 35. The reaction (industrial process) of nitrogen (N2) with hydrogen (Ha) to produce ammonia (NHy) is called (A) Respiration. (B) Combustion. (C) Photosynthesis (D) the Haber process. (E) none of these. 36. The reaction of carbon dioxide with water to produce glucose and oxygen is called (A) Photosynthesis. (B) Combustion. (C) the Haber process (D) Metabolism. (E) none of these. 37. How many moles of O2 are required to burn 6 moles of methane (CHa)? Balanced equation for the combustion of methane : CH4+ 2 O2 CO2 + 2 H2O (A) 2 (B) 4 (C) 6 (D) 12

Explanation / Answer

34)          by volume, air contains more than 78% nitrogen and most plants and animals need nitrogen, but the form of nitrogen in air is no suitable for the use, so atmospheric nitrogen should be attached with some organic compound so that plant and animals can use them. This process is called as nitrogen fixation

So answer is nitrogen fixation

35) production of ammonia using gaseous H2 and N2 under pressure of about 200 bar, this process is called THE HABER PROCESS

So answer is C

36) reaction of CO2 with H2O to produce glucose (energy ) and oxygen is nothing but PHOTOSYNTHESIS, All plant produce there food by the same process

So answer is A

37)

Balanced equation for combustion of methane is given

CH4 + 2O2 ---> CO2 + 2H2O

The reaction tell us that for the 1 mole of CH4 2 moles of O2 are required for the combustion

For the 6 moles of CH4 we need 6 *2 moles of O2

That means 6*2= 12 moles of O2 are required for the complete combustion of 6 moles of CH4

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