GRE Chemistry Practice Test 1

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Online GRE Chemistry Practice Test 1 for different Competitive Exams, Entrance Tests & Job Interviews. Test yourself. Take various online tests and find out how well you score before appearing in your upcoming interviews and written tests.

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Total questions: 20

Time limit: 30 minutes

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1. Which of the following elements has the highest electronegativity?
  1. Sodium
  2. Magnesium
  3. Fluorine
  4. Chlorine
2. Match the following compounds with their respective shapes:
  1. CO2 – Trigonal Planar
  2. H2O – Bent
  3. NH3 – Linear
  4. CH4 – Square Planar
3. A student performs a titration experiment using 0.1 M NaOH and an unknown weak acid. The pH at the equivalence point is found to be 8.7. What can be concluded about the acid?
  1. It is a strong acid.
  2. It is a weak acid.
  3. The concentration of the acid is very high.
  4. The NaOH was not standardized properly.
4. Arrange the following steps in the correct order for the synthesis of aspirin:
  1. Purification, Esterification, Neutralization
  2. Esterification, Neutralization, Purification
  3. Neutralization, Esterification, Purification
  4. Purification, Neutralization, Esterification
5. The process of _______ involves the movement of solvent molecules through a semipermeable membrane from a dilute solution to a concentrated one.
  1. Diffusion
  2. Osmosis
  3. Dialysis
  4. Effusion
6. Assertion (A): The rate of a chemical reaction doubles with every 10°C rise in temperature.
Reason (R): Increasing temperature increases the number of effective collisions.
  1. Both A and R are true, but R is not the correct explanation of A.
  2. Both A and R are true, and R is the correct explanation of A.
  3. A is true, but R is false.
  4. A is false, but R is true.
7. Which of the following is NOT a characteristic of an ideal gas?
  1. Particles are in random motion.
  2. No intermolecular forces.
  3. High density.
  4. Elastic collisions.
8. In the reaction 2H2 + O2 → 2H2O, if 4 moles of H2 react completely, how many moles of water are produced?
  1. 1 mole
  2. 2 moles
  3. 4 moles
  4. 8 moles
9. Which spectroscopic technique is best suited for determining the functional groups in an organic compound?
  1. NMR
  2. IR
  3. UV-Vis
  4. Mass Spectrometry
10. A buffer solution is prepared using acetic acid (CH3COOH) and sodium acetate (CH3COONa). What happens when a small amount of HCl is added to this buffer?
  1. The pH increases sharply.
  2. The pH decreases sharply.
  3. The pH remains almost unchanged.
  4. The solution becomes neutral.
11. In the periodic table, which group of elements are known as chalcogens?
  1. Group 1
  2. Group 16
  3. Group 17
  4. Group 18
12. Match the following reagents with their primary use in organic synthesis:
  1. NaBH4 – Polymerization
  2. Grignard reagent – Carbon-carbon bond formation
  3. PCC – Protein digestion
  4. DCC – Redox titration
13. A chemist observes that a reaction proceeds 50% faster when the concentration of a reactant is doubled. What is the order of the reaction with respect to that reactant?
  1. Zero order
  2. First order
  3. Second order
  4. Third order
14. Arrange the following in increasing order of bond dissociation energy: N≡N, O=O, F-F, Cl-Cl
  1. F-F < Cl-Cl < O=O < N≡N
  2. F-F < Cl-Cl < N≡N < O=O
  3. Cl-Cl < F-F < O=O < N≡N
  4. O=O < N≡N < F-F < Cl-Cl
15. The _______ rule states that electrons occupy degenerate orbitals singly before pairing.
  1. Pauli’s exclusion
  2. Hund’s
  3. Aufbau
  4. Heisenberg’s
16. Assertion (A): Transition metals exhibit variable oxidation states.
Reason (R): They have partially filled d-orbitals.
  1. Both A and R are false.
  2. Both A and R are true, and R explains A.
  3. A is true, but R is false.
  4. A is false, but R is true.
17. Which of the following is NOT a colligative property?
  1. Boiling point elevation
  2. Freezing point depression
  3. Surface tension
  4. Osmotic pressure
18. In NMR spectroscopy, the chemical shift of TMS (Tetramethylsilane) is set at:
  1. 10 ppm
  2. 1 ppm
  3. 0 ppm
  4. 5 ppm
19. A student observes that a blue solution turns colorless upon adding a reducing agent. Which ion is likely present in the solution?
  1. Na+
  2. Cu2+
  3. K+
  4. Ca2+
20. The IUPAC name of the compound CH3-CH2-CO-CH3 is:
  1. Propanal
  2. Butanone
  3. Ethyl methyl ketone
  4. 2-Butanol

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