927.Yoruglik nuri tushish burchagi sinish burchagi sinusiga nisbatan nima deyladi
A.kofitsient
B. burchagi
C. *sinish kafitsenti
D. nuqtada
928.Tekshirila yotgan eritma = sindirish korsatkichini aniqlashga asoslanib fizik kimyoviy analiz usul bu …..?
A.*refrentometrik analiz
B.argentometrik analiz
C.bromometriya analiz
D.yodometrik analiz
930.Qaysi usul yordamida refreksiya hodisasi yani tabiatdagi kora 2 xil optik muhit chegarasida yoruglik nurining sinishi yotadi
A.yodometrik usul
B.mor usuli
C. *refroktometrik usul
D.argentometrik usuli
931.Ammiyaklibufer aralashmasini tayyorlash uchun 100 ml lilitr 20%NH 4CI eritmasini 700 ml lilitr ….% li qaysi eritmasi bilan ishlatilatdi
A.20%NH4OH
B.10%NH4OH
C.NH3 –CH2COOH
D.5%NH4 OH
932.Indikatr tayorlanadi 0,5gr qanday rangli xromagen indikatri 10 ml amiyakli buffer eritmaga etiladi
A.och sariq
B.to’q qizil
C. *to’q kok
D.och yashil
933.Indikatr tayorlashda 0,5 Toq kok rangli xromagen indikatri buffer eritmada eritilib xajmi suv bilan necha ml ga etkaziladi
A.80 ml
B. 70ml
C. *100ml D.1000 ml
934.Indikatr tayorlashda 0,5 gr qora erioxrom t ni 10 ml amiyakli buffer aralshma bilan etayorlandigan mudati qancha
A.15 sutka
B.20 sutka
C.40sutka
D *10 sutka
935.To’q ko’k rangli xromagen indikatri amiyakli buffer eritmasining yaroqlili mudati qancha
A.10 sutka
B. *40 sutka
C. 30 sutka
D. 20 suta
936.Trilon B ning ekvivalent massami necha ga teng
A.180,12 gr ekvivalent
B.*186,12 ekvivalen
C.176, 12 ekvivalent
D.190,12 ekvivalent
937.Trilon B eritmasi qanday tayorlanadi
A. *aniq eritma
B. ish eritma
C. narmal eritma
D.eplik eritma
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