Oliy ta’lim muassasalariga kiruvchilar uchun

Matematika

46. (x+3) : (x­­-2) = 5:3 tenglamaning ildizi x0 bo‘lsa, 2x0+61 ifodaning son qiymatini toping.

A) -80 B) 70 C) 80 D) 81
47. 4 : (2x+5) = 2 : (3x-2) tenglamaning ildizi x0 bo‘lsa, 4x0+11 ifodaning son qiymatini toping.
A) -18 B) -20 C) 19 D) 20
48. 0,8 · (1,5x - 2) - 0,4x = 0,3 · (6x - 5) - 2,6 tenglamaning ildizi x0 bo‘lsa, x0² - 0,5x0 ifodaning son qiymatini toping.
A) 5 B) 1,25 C) 6,25 D) -5
49. Uchta javonda hammasi bo‘lib 385 ta kitob bor. Birinchi javonda ikkinchisiga qaraganda 8 ta ko‘p, ammo uchinchi javondagidan 9 ta kam kitob bor. Har bir javonda nechtadan kitob bor?
A) 128; 120; 137 B) 127; 119; 139
C) 127; 122; 136 D) 126; 134; 125
50. Teng yonli uchburchakning perimetri 51 sm ga teng. Asos yon tomondan 6 sm uzun. Shu uchburchak yon tomonining asosiga nisbatini toping.
A) 7 : 5 B) 5 : 7 C) 2 : 3 D) 10 : 7
51. Teng yonli uchburchakning perimetri 42 sm ga teng. Yon tomon asosning 2/3 qismini tashkil qiladi. Shu uchburchakning asosi yon tomonidan necha santimetr uzun?
A) 7,5 sm B) 6,5 sm C) 6 sm D) 7 sm
52. Usta buyurtmani 8 kunda bajarishi kerak edi. U har kuni rejadan tashqari 6 ta mahsulot tayyorlab, buyurtmani 5 kunda bajaribgina qolmasdan, balki ortiqcha yana 12 ta mahsulot tayyorladi. Usta reja bo‘yicha bir kunda nechta mahsulot tayyorlashi kerak edi?
A) 6 B) 4 C) 5 D) 7
53. Tenglamani yeching?
8(x + 2) -5x = -2(x + 4,5).
A) -5 B) 5 C) 6 D) -4,5
54. Hisoblang: 3³∙ 9⁵ : 81³
A) 3 B) B) B)
55. Tog`ri to`rtburchakning eni 8 sm ga teng, bo`yi undan 2 sm ga ortiq bo`lsa, uning perimetrini toping.
A) 24 sm B) 28 sm C) 36 sm D) 20 sm
56. Uchburchakning tomonlari 7 sm, 11 sm, 8 sm ga teng. Uchlari shu uchburchak tomonlarining o`rtalarida yotgan uchburchak perimetrini toping.
A) 13 sm B) 16 sm C) 22 sm D) 26 sm
57. To`rtburchak 3 ta burchagi yig`indisi 280⁰. To`rtinchi burchagiga qo`shni bo`lgan burchakning qiymatini toping.
A) 80⁰ B) 70⁰ C) 100⁰ D) 110⁰
58. Uchburchakning ikkita burchaklari 20⁰ va 60⁰ ga teng bo`lsa, uning noma’lum burchagini toping.
A) 100⁰ B) 20⁰ C) 80⁰ D) 120⁰
59. Agar uchburchakning A, B va C burchaklari 4; 5 va 6 sonlariga proporsional bo`lsa, A burchakni toping.
A) 60⁰ B) 30⁰ C) 48⁰ D) 72⁰
60. Teng yonli uchburchakning asosi yon tomonidan 2 sm ga qisqa. Agar uchburchakning perimetri 19 sm bo`lsa, asosining uzunligi necha santimetrga teng ?
A) 4 B) 5 C ) 6 D) 7
61. Kasrlarning yig`indisini toping: .
A) B) C) D)
62. Kasrlarni ayiring:
A) B) C) D)
63. Kasrni qisqartiring: .
A) B) C) D)
64. Algebraik kasrning son qiymatini toping
, bunda a= 4, b= -5.
A) -3,75 B) C) 3,75 D)
65. Surati p va q sonlarining kvadratlarining yig`indisiga, maxraji esa ularning ko`paytmasiga teng bo`lgan algebraik kasrni yozing.
A) B) C) D)
66. Hisoblang:
21,3 · 27 – 2 · 21,3 + 28,7 · 53 – 28 · 28,7=
A) 1300 B) 1330 C) 1250 D) 1800
67. Ko`paytuvchilarga ajrating: a² + ab -5a – 5b
A) (a+b)(a-5) B) (b-5)(a+2)
C) (b+a)(b+2) D) (a-3b)(a-5)
68. Tenglamani yeching: (2x+3)² - 4(x-1)(x+1)=49
A) 4 B) 3 C) -3 D) -4
69. Ko`paytuvchilarga ajrating: 25a² - 4b² + 10a + 4b
A) (5a-2b)(5a +2b + 2) B) (5a + 2b)(5a – 2b + 2)
C) (5a-2b)(5a-2b -2) D) (5a+2b)(5a+2b -2)
70. Ko`paytuvchilarga ajrating: 8a³-2ab²
A) 2a(2a-b)² B) 2a(2a+b)(2a-3b)
C) 2a(2a-b)(2a+b) D) (2a-b)(4a²+ab+b²)
71. Amallarni bajaring: ( ) : ( 2a + 3b).
A) B) 6ab C) 1 D) 2a + 3b
72. Kasrlarni ko`paytiring:
A) 15 B) C) D) .
73. Kasrlarni ko`paytiring: .
A) B) C) D)

74. Amallarni bajaring:

A) B) 0 C) D)
75. Kasrlarni bo`ling: : .
A) B) C) D)


Kimyo

76. Jism keltirilmagan qatorni tanlang?

A) Qoshiq B) Probirka
C) Shisha D) Kitob
77. Atom tushunchasini XVI asrda qaysi olim fanga kiritgan?
A) Dalton B) Demakrit
C) Gassendi D) Rezerford
78. Elektron zarracha tabiatiga ega ekanligining sababi nimada?
A) to’lqin uzunligi B) muayyan massasi borligi
C) kichkina ekanligi D) ega emas
79. Izobarlar joylashgan qatorni aniqlang?
A) ¹³⁶Xe, ¹³⁸Ba, ¹³⁹La B) ¹³⁷Xe, ¹³⁷Ba, ¹³⁸La
C) ⁵⁹Co, ⁵⁹Ni, ⁵⁹Fe D) ³⁴Cl, ³⁶Cl, ³⁷Cl
80. Quyidagi orbitallarning qaysi birlari mavjud?
𝐴) 1𝑠,2d 𝐵) 2𝑝,2𝑑 𝐶) 3𝑝,4𝑑 𝐷) 1𝑝,3𝑓
81. Atom elektron biriktirsa …….
A) zaryadi bittaga ortadi, massasi o’zgarmaydi
B) zaryadi ikkitaga ortadi, massasi to’rttaga ortadi
C) zaryadi ham, massasi ham bittaga ortadi
D) zaryadi bittaga kamayadi, massasi o’zgarmaydi
82. Quyidagi nomlardan qaysi biri ham oddiy
moddani, ham kimyoviy elementni anglatadi?
A) ko’mir B) temir C) grafit D) ozon
83. Har qaysi energetik pog’onadagi elektronlar soni (N) qaysi formula bilan hisoblanadi ?
A) N=2n² B) N=n² C) N=2l+1 D) N=2(2l+1)
84. Ham malaxit, ham kuprit tarkibiga kiradigan
element atom(lar)ini belgilang?
A) mis, kislorod, uglerod B) mis
C) mis, kislorod D) kislorod
85. Suvning suyuq, bug’, qattiq holda mavjud
bo’lishida uning … o’zgarmaydi?
A) tuzilishi B) molekulasi tarkibi
C) shakli D) holati
86. Grafit ham olmos ham aynan uglerodning
allotropiyasi ekanligini (ikkalovi ham uglerod
atomlaridan tashkil topganligini) qanday
aniqlash mumkin?
A) fizik xossalariga ko’ra
B) kislorodda yoqib ko’rib
C) nisbiy atom massasidan
D) tashqi belgilariga ko’ra
87. Quyidagilardan nechtasi kimyoviy moddaga
taalluqli emas?
1) izotop 2) yadro zaryad 3) zichlik 4) oksidlanish darajasi 5) suyuqlanish harorati 6) elektr o’tkazuvchanlik 7) xossa 8) agregat holat
A) 4 B) 2 C) 5 D) 3
88. Atomlarida elektron ko‘chish kuzatilmaydigan elementlarni belgilang?
1) texnetsiy; 2) mis; 3) xrom; 4) palladiy; 5) oltin;
6) volfram; 7) platina; 8) molibden; 9) kumush.
A) 4,7 B) 3,8 C) 2,4,5,9 D) 1,6
89. P₂O₅ N₂O₅ SO₂ NO₂ N₂O₃ Ushbu qatorda proton, neytron va elektronlar yig’indisi qanday o’zgarishini aniqlang?
a) ortadi; b) kamayadi; c) o’zgarmaydi;
A) 1b , 2b, 3b, 4a B) 4a, 3a, 2a, 1b C) 3a, 4c, 1c, 2a D) 2b, 1b, 4c, 3b
90. Zaryadsiz nuklonlar soni barcha zarrachalarning
40 % ini tashkil etadigan noma’lum element izotopi temirning massasi 56 bo’lgan izotopiga izobar bo’lsa, noma’lum elementning neytronlar soni qancha ?
A) 28 B) 32 C) 24 D) 26
91. Atom massasi 58 bo’lgan X²⁺ ionida protonlar soni neytronlar sonidan 6 taga kam, undagi elektronlar Y³⁺ ionidagi elektronlarga teng. Y elementi toping.
A) Ni B) Pt C) Co D) Fe
92. 3d⁶ elektron uchun kvant sonlari qiymatini (n,l,m_l,m_S) aniqlang?
A) 3;2;-2;-1/2 B) 3;2;-1;-1/2
C) 3;2;-2;+1/2 D) 3;1;+1;-1/2
93. Cr²⁺ va V tarkibidagi nechta elektron uchun to’rtala kvant sonlari qiymati bir xil?
A) 22 B) 20 C) 21 D) 23
94. A va B pog’onachadagi maksimal elektronlar soni yig’indisi 148, ayirmasi esa 48 bo’lsa, elektronlari ko’p bo’lgan pog’onaning bosh kvant soni qiymatini toping?
A) 5 B) 6 C) 7 D) 8
95. Xlor atomining elektron formulasini aniqlang?
A). .3p⁶4s¹ B). .3d⁴4s² C). .3d¹4s² D). .3p⁵3s²
96. Fe −atomining qo`zg`algan xolatdagi toq elektronlar sonini aniqlang?
A) 14 𝑡𝑎 B) 3 𝑡𝑎 C) 2 𝑡𝑎 D) 4 𝑡𝑎
97. Oltingugurt atomining qo’zg’algan holatida atomning energetik afzallikka ega bo’lishi qaysi qoida bilan tushuntiriladi?
A) Hund qoidasi
B) Klechkovskiyning 1-qonuni
C) Pauli prinsipi
D) Klechkovskiyning 2-qonuni
98. quyidagi radioaktiv o’zgarishda qanday jarayon sodir bo’lishini aniqlang?
A) - chiqarish B) α-chiqarish C) - chiqarish
99. 15,24 mg nobeliy izotopi parchalanganda necha mg kyuriy izotopi hosil bo’ladi?
(A – x = 249 x + y = 9 )
A) 29 B) 39,6 C) 9,36 D) 14,04
^{100. Agar nisbiy atom massasi birligi sifatida uglerod absolyut massasining 1/12 qismi emas,
2/3 qismi olinsa, nisbiy atom massa qiymati qanday o’zgaradi?
A) 4 marta ortadi B) 4 marta kamayadi
C) 8 marta ortadi D) 8 marta kamayadi}
101. 0,75 mol pirit (FeS2) ning massasini (g)
aniqlang?
A) 79,2 B) 39,6 C) 90 D) 36
102. 1,25 mol CaXO3 birikma tarkibida X ning massasi Ca va O ning birgalikdagi massasidan 70 g ga kam bo’lsa, shu birikma tarkibida necha % (massa jihatidan) Ca bor?
A) 34,5 B) 100/3 C) 40 D) 50
103. 0,125 mol XH4 ning massasi 2 g keladi. 0,25 mol X2Hn ning massasi 7,5 ni tashkil qilsa, “n” ning qiymatini aniqlang?
A) 6 B) 3 C) 4 D) 2
104. 122 g X3(YO4)2 da 1,2 mol X va massa jihatdan 49,2% Y bor. 183 g shu modda tarkibidagi neytronlar sonini aniqlang? (NA - Avogadro doimiysi)
A) 65,2 • NA B) 40,8 • NA
C) 97,8 • NA D) 81,6 • NA
105. Massa nisbatlari 3,3 : 2,3 bo’lgan N₂O va NO₂ ning atomlar soni nisbati qanday bo’ladi?
A) 1,4 : 2 B) 2,8 : 5 C) 1 : 3 D) 1,2 : 2,4