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100+ Free Armenia Chemistry Unified Exam Practice Questions

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Key Facts: Armenia Chemistry Unified Exam Exam

Armenia's Unified Entrance Exam in Chemistry (ATC / Dimord.am) combines Level A and Level B tasks in a single 180-minute sitting for a 4,500 AMD fee, graded on a 20-point scale on which 7.5 is the minimum positive score.

Sample Armenia Chemistry Unified Exam Practice Questions

Try these sample questions to test your Armenia Chemistry Unified Exam exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1What is the ground-state electron configuration of the chromium atom (24_Cr)?
A.1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁵ 4s¹ ([Ar] 3d⁵ 4s¹)
B.1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁴ 4s² ([Ar] 3d⁴ 4s²)
C.1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁶ ([Ar] 3d⁶)
D.1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 4p⁴
Explanation: Chromium exhibits an exceptional electron configuration where an electron from the 4s subshell is promoted to 3d to achieve a half-filled, symmetrically stable 3d⁵ subshell: [Ar] 3d⁵ 4s¹.
2Which of the following molecules has a non-polar (zero dipole moment) linear molecular geometry despite containing polar covalent bonds?
A.CO2 (Carbon dioxide)
B.H2O (Water)
C.SO2 (Sulfur dioxide)
D.NH3 (Ammonia)
Explanation: CO2 has a linear geometry (O=C=O) with an sp-hybridized carbon atom. The two equal bond dipoles point in exactly opposite directions (180°), canceling each other to produce a net zero dipole moment.
3In the reaction 2NO(g) + O2(g) <=> 2NO2(g) + Q (exothermic), which change will shift the chemical equilibrium toward the formation of more products (to the right)?
A.Increasing the pressure or decreasing the temperature
B.Decreasing the pressure or increasing the temperature
C.Adding a catalyst
D.Removing NO(g) from the reaction vessel
Explanation: By Le Chatelier's Principle: increasing pressure favors the side with fewer gas moles (3 moles on left -> 2 moles on right), and decreasing temperature favors the exothermic forward reaction (+Q).
4What is the oxidation state of sulfur in sodium thiosulfate (Na2S2O3)?
A.+2
B.+4
C.+6
D.+2.5
Explanation: In Na2S2O3: Na is +1 (total +2), O is -2 (total -6). Sum of oxidation numbers = 0: 2(+1) + 2(S) + 3(-2) = 0 => 2 + 2S - 6 = 0 => 2S = +4 => S = +2.
5What is the pH of a 0.005 M aqueous solution of barium hydroxide (Ba(OH)2), assuming complete electrolytic dissociation at 25°C?
A.12.0
B.11.7
C.2.0
D.11.0
Explanation: Ba(OH)2 -> Ba²⁺ + 2OH⁻. Hydroxide concentration [OH⁻] = 2 * 0.005 M = 0.010 M = 10^-2 M. pOH = -log10[OH⁻] = -log10(10^-2) = 2.0. pH = 14.0 - pOH = 14.0 - 2.0 = 12.0.
6Which of the following salts undergoes cationic hydrolysis, producing an acidic aqueous solution (pH < 7)?
A.NH4Cl (Ammonium chloride)
B.Na2CO3 (Sodium carbonate)
C.K2SO4 (Potassium sulfate)
D.CH3COONa (Sodium acetate)
Explanation: NH4Cl is formed by a weak base (NH3*H2O) and a strong acid (HCl). The ammonium cation hydrolyzes: NH4⁺ + H2O <=> NH3*H2O + H⁺, generating excess H⁺ ions and creating an acidic solution (pH < 7).
7Which gas is evolved when concentrated nitric acid (HNO3) reacts with metallic copper (Cu)?
A.NO2 (Nitrogen dioxide, brown pungent gas)
B.H2 (Hydrogen)
C.N2O (Nitrous oxide)
D.NH3 (Ammonia)
Explanation: Concentrated nitric acid acts as a strong oxidizing agent on copper according to: Cu + 4HNO3(conc) -> Cu(NO3)2 + 2NO2(uparrow) + 2H2O, producing dense brown fumes of NO2.
8Which of the following oxides is amphoteric (capable of reacting with both strong acids and strong bases)?
A.Al2O3 (Aluminum oxide)
B.CaO (Calcium oxide - basic)
C.SO3 (Sulfur trioxide - acidic)
D.CO (Carbon monoxide - neutral/non-salt forming)
Explanation: Al2O3 and ZnO are classic amphoteric oxides: Al2O3 + 6HCl -> 2AlCl3 + 3H2O; Al2O3 + 2NaOH + 3H2O -> 2Na[Al(OH)4] (sodium tetrahydroxoaluminate).
9What is the qualitative test reagent and characteristic observation used to identify sulfate ions (SO4²⁻) in an aqueous solution?
A.Addition of BaCl2 solution, forming a white precipitate (BaSO4) insoluble in concentrated mineral acids
B.Addition of AgNO3 solution, forming a yellow precipitate
C.Addition of NaOH solution, forming a blue precipitate
D.Addition of HCl solution, evolving a gas with rotten-egg odor
Explanation: Barium chloride (BaCl2) reacts with sulfate ions to precipitate dense white barium sulfate (Ba²⁺ + SO4²⁻ -> BaSO4(downarrow)), which is uniquely insoluble in dilute and concentrated hydrochloric and nitric acids.
10What is the primary organic product obtained from the catalytic hydration of propene (CH3-CH=CH2 + H2O) in the presence of sulfuric acid according to Markovnikov's rule?
A.Propan-2-ol (Isopropanol / CH3-CH(OH)-CH3)
B.Propan-1-ol (1-Propanol / CH3-CH2-CH2-OH)
C.Propanal (CH3-CH2-CHO)
D.Propanoic acid (CH3-CH2-COOH)
Explanation: According to Markovnikov's rule, the hydrogen ion (H⁺) adds to the carbon with more hydrogen atoms (C1), and the hydroxyl group (OH⁻) adds to the more substituted secondary carbon (C2), yielding propan-2-ol.

About the Armenia Chemistry Unified Exam Exam

The Chemistry Unified Entrance Examination (Միասնական քննություն՝ «Քիմիա») is the official national entrance examination in Armenia for admission to medical, pharmaceutical, biological, chemical, agricultural, and environmental engineering programs. Administered centrally by the Assessment and Testing Center (ATC) and Ministry of ESCS via Dimord.am, the test rigorously evaluates general theoretical chemistry, inorganic compounds, organic functional groups, reaction mechanisms, and stoichiometric problem-solving on a 20-point scale. This practice bank provides an English-language MCQ study adaptation featuring step-by-step stoichiometric calculations and reaction analyses.

Assessment

Standardized nationwide written examination lasting 180 minutes (3 hours), built from Level A and Level B tasks with sub-tasks. ATC sub-task types are four-option multiple choice, short written answer, and clusters of six statements marked True / False / Don't know. The raw score is converted to Armenia's 20-point admission scale.

Time Limit

180 minutes (3 hours)

Passing Score

7.5 out of 20 is the minimum positive score (RA Government Decision N 597-Ն, clause 67, as amended). Admission to faculties such as Yerevan State Medical University is decided competitively on the sum of two unified exam scores, and ATC publishes the annual cut-off for each programme.

Exam Fee

4,500 AMD (Assessment and Testing Center (ATC / ԳԹԿ - atc.am) / Ministry of ESCS)

Armenia Chemistry Unified Exam Exam Content Outline

25%

General Chemistry Principles

Electronic configurations, periodic trends, chemical bonding, thermochemistry, reaction rate factors, equilibrium constants, and redox half-reactions.

25%

Inorganic Chemistry

Main-group and transition elements, mineral acids, coordination complexes, hydrolysis of salts, and qualitative ion identification.

25%

Organic Chemistry

Homologous series, electrophilic/nucleophilic additions, Markovnikov's rule, esterification, polymerisation, and biochemical macromolecules.

25%

Stoichiometry & Quantitative Analysis

Molar masses, percentage yields, gas molar volume at STP (22.4 L/mol), solution concentration (mass percent, molarity), and multi-step mixture calculations.

How to Pass the Armenia Chemistry Unified Exam Exam

What You Need to Know

  • Passing score: 7.5 out of 20 is the minimum positive score (RA Government Decision N 597-Ն, clause 67, as amended). Admission to faculties such as Yerevan State Medical University is decided competitively on the sum of two unified exam scores, and ATC publishes the annual cut-off for each programme.
  • Assessment: Standardized nationwide written examination lasting 180 minutes (3 hours), built from Level A and Level B tasks with sub-tasks. ATC sub-task types are four-option multiple choice, short written answer, and clusters of six statements marked True / False / Don't know. The raw score is converted to Armenia's 20-point admission scale.
  • Time limit: 180 minutes (3 hours)
  • Exam fee: 4,500 AMD

Keys to Passing

  • Work through all 100 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

Armenia Chemistry Unified Exam Study Tips from Top Performers

1Master the electron-balance method for balancing complex oxidation-reduction reactions in acidic and basic media.
2Review the core functional group transformation pathways in organic synthesis (alkenes -> alcohols -> aldehydes -> carboxylic acids -> esters).
3Practice solving multi-step mixture problems (e.g., metal alloy reactions with acids or carbonate mixtures with HCl) by hand without calculators.
4Solve past ATC test booklets (շտեմարաններ) under timed conditions.

Frequently Asked Questions

What is the Chemistry Unified Exam in Armenia?

It is the standardized national entrance examination administered by the Assessment and Testing Center (ATC) for applicants to medicine, pharmacy, dentistry, biochemistry, and chemical technology across Armenian universities.

How many tasks are on the exam and what is the testing time?

The examination combines Level A and Level B tasks with sub-tasks and is sat during a single 180-minute (3-hour) session. ATC does not publish a fixed task count for this subject.

What is the passing score?

A score of 7.5 or higher out of 20 is a positive result and admits the candidate to the competitive ranking, which is decided on the sum of two unified exam scores.

Are reference tables provided during the exam?

Yes, candidates receive standard reference sheets containing Mendeleev's Periodic Table of Elements, the Solubility Table of Salts, Acids, and Bases in Water, and the Electrochemical Series of Metal Reactivity.