Test: Variant #6 of the University Scholarship Examination

Vestnik: CAU Scholarship Examination | Mavzudagi savollar: 50 | Fan: Bio+Chem

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Mavzu savollari

1

What is the ground-state electron configuration of a neutral Copper (Cu) atom (Z = 29)?

Variantlar: 4

2

Which of the following elements has the highest electronegativity?

Variantlar: 4

3

What is the molecular geometry of Carbon Dioxide (CO₂)?

Variantlar: 4

4

In the redox reaction: 3H₂S + 2HNO₃ → 3S + 2NO + 4H₂O, which element is being oxidized?

Variantlar: 4

5

How many atoms are contained in 28 grams of pure Iron (Fe)? (Atomic mass of Fe = 56 g/mol, Nₐ = 6.02 × 10²³)

Variantlar: 4

6

Iron reacts with Hydrochloric acid as follows: Fe + 2HCl → FeCl₂ + H₂. If 28 g of Iron reacts with excess acid and only 0.8 g of Hydrogen...

Variantlar: 4

7

What is the molarity (M) of a solution containing 4.0 g of NaOH in 500 mL of solution? (Molar mass of NaOH = 40 g/mol)

Variantlar: 4

8

Which of the following substances is a weak electrolyte?

Variantlar: 4

9

What is the characteristic pH of a 0.1 M aqueous solution of Sodium Sulfide (Na₂S)?

Variantlar: 4

10

If the temperature of a reaction is increased by 10 °C, the rate of reaction often doubles. This is primarily because:

Variantlar: 4

11

For the equilibrium: N₂(g) + 3H₂(g) ⇌ 2NH₃(g), how will decreasing the volume of the container at constant temperature affect the system?

Variantlar: 4

12

Calculate the standard enthalpy of combustion for Ethanol (C₂H₅OH) using the following standard enthalpies of formation (ΔH°f): C₂H₅OH(l)...

Variantlar: 4

13

When Chlorine gas (Cl₂) is bubbled through a solution of Potassium Iodide (KI), what observation is made?

Variantlar: 4

14

Which of the following metals is most likely to be found in its native (uncombined) state in nature?

Variantlar: 4

15

What is the IUPAC name for the hydrocarbon CH₃-C≡C-CH₂-CH₃?

Variantlar: 4

16

Which functional group is characteristic of carboxylic acids?

Variantlar: 4

17

Which test is used to detect the presence of proteins in a food sample?

Variantlar: 4

18

Complete combustion of 1.20 g of an organic compound containing C, H, and O produced 1.76 g of CO₂ and 0.72 g of H₂O. What is its empiric...

Variantlar: 4

19

[Olympiad] Calculate the pH of a 0.15 M solution of Methylamine (CH₃NH₂). (Kb = 4.4 × 10⁻⁴)

Variantlar: 4

20

[Olympiad] The solubility product (Ksp) of Silver chromate (Ag₂CrO₄) is 1.1 × 10⁻¹². Calculate its molar solubility in pure water.

Variantlar: 4

21

[Olympiad] The rate of a reaction triples when the temperature is increased from 298 K to 308 K. Calculate the activation energy (Ea) in ...

Variantlar: 4

22

[Olympiad] For a certain process, ΔH = -85 kJ/mol and ΔG = -25 kJ/mol at 300 K. What is the entropy change (ΔS) for this process in J/mol·K?

Variantlar: 4

23

[Olympiad] A metal crystallizes in a body-centered cubic (BCC) lattice. If the unit cell edge length is 300 pm and the density is 10.0 g/...

Variantlar: 4

24

[Olympiad] How many optical isomers are possible for the octahedral complex [Co(en)₃]³⁺? (en = ethylenediamine)

Variantlar: 4

25

[Olympiad] Which of the following compounds will rotate the plane of polarized light?

Variantlar: 4

26

Which structure is found in both prokaryotic (bacterial) and eukaryotic (animal/plant) cells?

Variantlar: 4

27

Which of the following processes requires the use of metabolic energy (ATP)?

Variantlar: 4

28

What is the primary function of glycogen in the human body?

Variantlar: 4

29

How does increasing the substrate concentration affect the rate of an enzyme-catalyzed reaction?

Variantlar: 4

30

Which of the following are the required reactants for photosynthesis?

Variantlar: 4

31

Which organ in the human body produces digestive enzymes, insulin, and glucagon?

Variantlar: 4

32

What is the main component of human blood plasma?

Variantlar: 4

33

In the human eye, which layer contains the light-sensitive receptor cells (rods and cones)?

Variantlar: 4

34

In a plant, which part acts as a "source" during the summer?

Variantlar: 4

35

What is the specific site of the Krebs cycle within a eukaryotic cell?

Variantlar: 4

36

In a flowering plant, which structure produces pollen grains?

Variantlar: 4

37

Hemophilia is a sex-linked recessive disorder. If a carrier female ($X^H X^h$) has children with a normal male ($X^H Y$), what is the pro...

Variantlar: 4

38

In an ecosystem, what is the role of decomposers like fungi?

Variantlar: 4

39

What is the ultimate source of new alleles in a population?

Variantlar: 4

40

In a large-scale industrial fermenter, what is the primary purpose of the water jacket?

Variantlar: 4

41

Which gas is the most significant contributor to the "enhanced greenhouse effect" due to human activity?

Variantlar: 4

42

Which of the following is a direct consequence of sulfur dioxide emissions from factories?

Variantlar: 4

43

In plants, a deficiency of Magnesium ions results in:

Variantlar: 4

44

Which cells of the immune system are responsible for "immunological memory"?

Variantlar: 4

45

What is the main function of the placenta during human pregnancy?

Variantlar: 4

46

Which characteristic of living organisms is defined as "a permanent increase in size and dry mass"?

Variantlar: 4

47

Which class of vertebrates is characterized by having moist skin, laying jelly-like eggs in water, and undergoing metamorphosis?

Variantlar: 4

48

What happens to a plant cell when it is placed in pure water?

Variantlar: 4

49

During sexual reproduction, the fusion of a male and female gamete produces a:

Variantlar: 4

50

Selective breeding (artificial selection) is used by humans to:

Variantlar: 4

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