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Q81) Which of the following is used as fertilizer? [ CPMT 1998]




SOLUTION


Answer: (c)


Q82) In modern process, white phosphorus is manufactured by .. [ CPMT 1994]




SOLUTION

2Ca3(PO4)2 + 6caSiO3 → 6CaSiO3 + P4P10
P4O10 + 10C → P4 + 10CO
Answer: (a)


Q83) When excess of water is added to BiCl3 solution .. [ AFMC 1994]



SOLUTION

BiCl3 + H2O → 2Hcl + BiOCl ( white ppt)
Answer:(c)



Q84) Which of the following is a cyclic phosphate? [ Haryana CEET 1996]



SOLUTION

H5P5O15 is metaphosphoric acid which is pentameric . (HPO3) and will give cyclic phosphate
Answer: (c)


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