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METALLMASLAR 2018

A) potash va PbO B) fayans
C) potash D) FeO yoki Cu2O
4. Havo aralashgan azot (IV) oksid solingan idishga mayda ko’mir bo’lakchalari solib yaxshilab aralashtirilsa va bir oz tinch qoldirilsa azot (IV) oksidning ko’mirga yutilishi natijasida idishdagi aralashma rangsizlanadi. Bu hodisa nima deyiladi?
A) adsorbsiya B) diffuziya
C) flotatsiya D)sublimatsiya
5. Billur shisha olish uchun kerak bo’ladigan xom ashyoni ko’rsating.
A) potash, qum, PbO
B) potash, qum, CrO
C) potash, qum, oxaktosh
D) oxaktosh, qum, PbO

6 .Qanday qattiq modda ham izotrop, ham kristall holatlarda bo’lishi mumkin?


A) yelim B) kanifol
C) shisha D) kremniy (IV) oksid

7. Ftorapatitdagi ftorning massa ulushi olevindagi kremniyning massa ulushidan necha marta kichik?


A) 58 B) 8 C) 4 D) 62

8. Kainitdagi oltingugurtning massa ulushi taxir tuzdagi kislorodning massa ulushidan necha marta kichik?


A) 58,66 B) 5,56 C) 41,3 D) 0,18

9. Kir sodasidagi uglerodning massa ulushi kaustik sodadagi kislorodning massa ulushidan necha marta kichik?


A) 40 B) 0,1 C) 45 D) 9,53

10. Kalsitdagi kislorodning massa ulushi temir sodadagi kislorodning massa ulushidan necha marta kichik?


A) 0,94 B) 1,06 C) 2,4 D) 48

11. Kizeritdagi magniyning massa ulushi kriolitdagi natriyning massa ulushidan necha marta kichik?


A) 0,58 B) 0,64 C) 0,71 D) 0,62


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