Kimyo-2012 Abiutriyent-2012 1

35. 90 g formaldegiddan necha gramm urotropin olish mumkin?
A) 84 B) 70 C)80 D)90


36. CH₃C(CH₃)₂C(Cl)(CH₃)₂,
CH₃C(CH₃)₂CH(Cl)CH₃ va CH₃CH(CH₃)CH(CH₃)CH₂Cl aralashmasiga Na metali ta`sir ettirilganda qanday alkanlar hosil bo`ladi?
1) CH₃C(CH₃)₂C(CH₃)₂C - - (CH₃)₂C(CH₃)₃
2) CH₃C(CH₃)₂CH(CH₃)CH - -(CH₃)C(CH₃)₃
3) CH₃C(CH₃)₂C(CH₃)₂CH₂CH- - (CH₃)CH(CH₃)₂
4) CH₃C(CH₃)₂C(CH₃)₂CH- - (CH₃)CH(CH₃)₂
5) CH₃CH(CH₃)CH(CH₃)(CH₂)₂CH- -(CH₃)CH(CH₃)₂
6) CH₃C(CH₃)₂C(CH₃)₂CH- - (CH₃)C(CH₃)₃
7) CH₃C(CH₃)₂CH₂CH- - (CH₃)CH(CH₃)CH(CH₃)₂
8) CH₃CH(CH₃)CH(CH₃)CH₂CH- - (CH₃)CH(CH₃)₂
9) CH₃C(CH₃)₂C(CH₃)₂CH₂CH- - (CH₃)C(CH₃)₃
10)CH₃C(CH₃)₂CH(CH₃)CH₂CH- - (CH₃)CH(CH₃)₂
A) 1, 2, 3, 5, 6, 10 B) 1, 2, 5, 7, 8, 10
C) 1, 2, 4, 7, 8, 9 D) 1, 2, 5, 6, 8, 10

KIMYO 2012
1. 400g 10%li CuSO₄ eritmasi elektroliz qilinganda uning massasi 23,6 g ga kamaydi. Elektrodlarda ajralib chiqqan moddalar massasini toping.
1) katodda 18,88g Cu; 2) katodda 0,4 g H₂;
3) katodda 2g H₂; 4) anodda 5,6 g O₂
5) katodda 16g Cu; 6) anodda 7,2 g O₂
A) 2, 4, 5 B) 3, 5, 6 C) 1, 3, 4 D) 2, 5, 6


2. Quyidagi moddalarni qaysi holat bo`yicha gidrolizga uchrashini aniqlang.
1) MgSO<sub>4</sub>; 2)FeCl<sub>2</sub>; 3) NaCl; 4) H<sub>3</sub>PO<sub>4</sub>
a) anion bo`yicha; b) kation bo`yicha;
c) uchramadi; d) ham kation, ham anion bo`yicha
A) 2a, 1a, 4d, 3d B) 4c, 1b, 3a, 2b
C) 3c, 4c, 1b,2b D) 1b, 2b, 3c, 4a


3. 1s²2s²2p⁶3s²3p⁶3d⁵ elektron konfiguratsiya ESO₄ tarkibidagi E ga tegishli bo`lsa. E ni aniqlang.
A) Cr B) Fe C) Cu D) Mn


4. Quyidagi molekulalarning qaysilarida sp³- gibridlangan uglerod atomi bor?
1) tsianid kislota; 2) C₃H₆ ; 3)tsiklopropan;
4)2-metilbutadien-1,3; 5)CO₂; 6) CH₄
A) 2, 3, 5, 6 B) 1, 2, 3, 4 C)1, 3, 4, 6
D) 2, 3, 4, 6


5. 147,2 g chumoli kislota olish uchun necha gramm kaliy formiat sarflanadi? Reaksiya unumi 80%
A) 420 B) 252 C) 336 D) 378


6. Hajmiy nisbatlari 1:2:1 bo`lgan ammiak, kislarod va azotdan iborat gazlar aralashmasi yondirildi va boshlang`ich sharoitga keltirildi. Reaksiyadan keyingi gazlar aralshmasining o`rtacha molar massasini (g/mol) hisoblang
A) 29,8 B) 30,0 C) 28,7 D) 29,0


7. Noma`lum modda kumush oksidining ammiakdagi eritmasi bilan oksidlanganda 39,2 g kislota, qaytarilganda 36,4 g spirt hosil qilsa, spirtni aniqlang.
A) CH₂OH(CHOH)₄CH₂OH
B) CH₂OH(CHOH)₃CH(OH)CH₃
C) CH₂OH(CHOH)₃CH₂OH
D) CH₃(CH₂)₄CH₂OH


8. Meditsinada narkoz sifatida ishlatiladigan sikloalkani 2 molini to`la yondirish uchun qancha hajm (m³) havo sarflanadi? (O₂)=0,2
A)0,8064 B) 1,26 C) 0,9072 D) 1,008