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Q9)For the manufacture of NH3 by the following reaction N2 + 3H2 →2NH3+ 21.9 kCal the favorable conditions are [AFMC 2001 ]



SOLUTION

Reaction is exothermic as heat is positive. Therefore low temperature will favour reaction in forward direction. And high pressure will again shift the reaction in forward direction as in forward direction number of becomes less
Answer: (a)


Q10) Which of the following fluoride does not exist? [ MP CEE 1993]



SOLUTION

Due to non availability of d orbital in Nitrogen, NF5 do not exist
Answer: (a)


Q11) NH4Cl solution is



SOLUTION

NH4Cl is the salt of strong acid and weak base NH4+ will hydrolyses water to produce H+ makes solution acidic
Answer: (b)



Q12) The laughing gas is



SOLUTION

Nitrous oxide is also used as anesthetic
Answer: (a)


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