1. Mr va m nechta zarrachaga tegishli massa?

A) 0,5 B) 1 C) 0,8 D) 0,4
17. Bosh va orbital kvant sonlari yig’indisi 8 ga teng bo’lgan jami necha xil holat mavjud.
A) 6 B) 5 C) 4 D) 8
18. Sxemaning quyi (a, b, c, d) katakchalariga mos keluvchi moddalar to‘g‘ri ko‘rsatilgan javobni belgilang.
A) a –H₂O₂; b – K₂Cr₂O₇ c − NH₄NO₃;
d − (NH₄)₂Cr₂O₇
B) a − HgO; b − NaHCO₃;
c − (NH₄)₂CO₃; d − (NH₄)₂Cr₂O₇
C) a − AgNO₃; b − CaCO₃; c − NH₄NO₃;
d − NH₄Cl
D) a – CrO₃; b – K₂Cr₂O₇;
c − (NH₄)₂CO₃; d − NH₄Cl
19. yadro reaksiyasida 12,7 mg No yemirilishidan hosil bo’lgan elektronlar sonini aniqlang.
( a-x 239 x+y 9 )
A) 36,12 10²³ B) 12,04 10¹⁹
C) 18,06 10¹⁸ D) 96,32 10¹⁸

20. Mis sim qizdirilganda massasi 20% ortgan. Hosil bo‘lgan aralashmadagi misning massa ulushini aniqlang.

A) 5/12 B) 1/6 C ) 1/12 D) 5/6
21. 4p⁶ va 4d² lardagi oxirgi elektronlari o’zaro bir-biridan qaysi kvant soni bilan farq qiladi.
A) orbital va magnit B) magnit
C) orbital D) spin va magnit
22. Quyidagi minerallarni ularning tarkibiga to’g’ri keladigan moddalar formulasi bilan juftlab ko‟rsating.
1) grinokit 2) kinovar 3) argentit 4) xalkozin a) Cu₂S b) Ag₂S c) HgS d) CdS
A)1a; 2b; 3c; 4d B)1c; 2a; 3b; 4d
C)1b; 2c; 3d; 4a D)1d; 2c; 3b; 4a
23. O‘zgarmas hajmli reaktorda borayotgan
A_(g) 5B_(g) jarayon uchun zichlik (1), molyar hajm(2) qanday o‘zgaradi?
a) ortadi; b) kamayadi; c) o’zgarmaydi
A) 1 – a; 2 – b B) 1 – a; 2 – c
C) 1 – b; 2 – a