A) faqat O
2
B) Cu, O
2
C) N
2
, Cu, O
2
D) faqat
Cu
187. Rangsiz, sarimsoq hidli, suvda erimaydi, zaharli,
molekulyar kristall panjaraga ega; bu ta‘riflar qaysi fosfor
allotropiyasiga tegishli?
A) qora B) qizil C) binafsha D) oq
188. Quyidagilar orasidan sariq cho‗ kmani ko‗ rsating.
A) Ca
3
(PO
4
)
2
B) Ba
3
(PO
4
)
2
C) Ag
3
PO
4
D) AgCl
189. O‗ simlikda azot, fosfor va kaliyning o‗
zlashtirilishini tezlashtiruvchi mikroelementni ko‗
rsating.
A) Mn B) Fe C) Cu D) Zn
190. Inson tanasining 99,4 % ini tashkil etuvchi
elementlarni ko‗ rsating.
A) Ca, N, C, O, H B) Fe, Ca, N, Cl, F
C) Na, K, P, Ca, Fe D) C, N, Fe, Cl, J
191. Qo‗ sh superfosfat formulasini ko‗ rsating.
A) Ca
5
(PO
4
)F
2
B) CaHPO
4
·2H
2
O C)
NH
4
CaPO
4
D) Ca(H
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