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AP Intermediate 1st Year Chemical Thermodynamics — practice questions

Explore 46 free Chemical Thermodynamics questions in AP Intermediate 1st Year Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Chemical Thermodynamics questions and exercises with answers

Showing questions 1–30 of 46.

Which of the following are the elements of group 18?Read the answer and worked solution →The number of moles in 23.3 g of zinc (atomic mass ≈ 65.4) is approximately _____.Read the answer and worked solution →In the modern periodic table, elements with atomic numbers 11 to 18 are placed in which period?Read the answer and worked solution →Which of the following inert (noble) gases is placed in period 4 of the periodic table?Read the answer and worked solution →In the modern periodic table, elements of which group have a complete outermost shell?Read the answer and worked solution →In Rutherford's α-particle scattering experiment, the principal conclusion was that:Read the answer and worked solution →The wavelength λ associated with a particle of momentum p (de Broglie hypothesis) is:Read the answer and worked solution →According to Bohr's model, the radius of the n-th orbit in a hydrogen atom is proportional to:Read the answer and worked solution →The energy of the n-th orbit in a hydrogen atom (Bohr) varies as:Read the answer and worked solution →When an electron in a hydrogen atom transitions from n = 3 to n = 2, the emitted photon belongs to the:Read the answer and worked solution →The four quantum numbers (n, ℓ, m_ℓ, m_s) for the last electron of sodium (Z = 11) in its ground state are:Read the answer and worked solution →Pauli's exclusion principle states that:Read the answer and worked solution →Hund's rule of maximum multiplicity says that in a set of degenerate orbitals:Read the answer and worked solution →The maximum number of electrons that can occupy the 4th principal shell (n = 4) is:Read the answer and worked solution →The shape of a 2p orbital is:Read the answer and worked solution →The Heisenberg uncertainty principle states that the product Δx · Δp is at least of the order of:Read the answer and worked solution →The ground-state electronic configuration of Cu (Z = 29) is:Read the answer and worked solution →An electron in a hydrogen atom falls from n = 4 to n = 2. The wavelength of the emitted photon (R_H = 1.097 × 10⁷ m⁻¹) is closest to:Read the answer and worked solution →The number of radial nodes in a 3s orbital is:Read the answer and worked solution →Isotopes of an element differ in:Read the answer and worked solution →A covalent bond involves:Read the answer and worked solution →According to VSEPR theory, the geometry of CH₄ around the carbon atom is:Read the answer and worked solution →The geometry of water (H₂O) is:Read the answer and worked solution →The hybridisation of carbon in ethylene (C₂H₄) is:Read the answer and worked solution →The hybridisation of nitrogen in ammonia (NH₃) is:Read the answer and worked solution →Among HF, HCl, HBr and HI, the molecule with the highest dipole moment is:Read the answer and worked solution →The maximum number of bonds an oxygen atom can normally form is:Read the answer and worked solution →Bond order in molecular orbital theory is defined as:Read the answer and worked solution →Among N₂, O₂, F₂ and Ne₂, the molecule with the highest bond order is:Read the answer and worked solution →Which of the following diatomic species is paramagnetic in its ground state?Read the answer and worked solution →

Worked practice questions

Which of the following are the elements of group 18?

  1. Alkaline earth metals
  2. Halogens
  3. Alkali metals
  4. Noble gases
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Correct answer: D. Noble gases

1. Group 18 is the last column of the periodic table. 2. These elements have completely filled outer shells and are chemically inert. 3. They are known as the noble gases. _Source: RRB Group D CEN-02/2018 PYQ, Q.3._

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The number of moles in 23.3 g of zinc (atomic mass ≈ 65.4) is approximately _____.

  1. 0.25
  2. 0.53
  3. 0.35
  4. 0.37
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Correct answer: C. 0.35

1. Moles = mass / atomic mass. 2. Moles = 23.3 / 65.4. 3. = 0.356 ≈ 0.35. _Source: RRB Group D CEN-02/2018 PYQ, Q.17._

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In the modern periodic table, elements with atomic numbers 11 to 18 are placed in which period?

  1. 3
  2. 1
  3. 2
  4. 4
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Correct answer: A. 3

1. Period 1 holds atomic numbers 1–2, period 2 holds 3–10. 2. The next period, period 3, holds atomic numbers 11–18. 3. Hence elements 11 to 18 are in period 3. _Source: RRB Group D CEN-02/2018 PYQ, Q.45._

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More Chemistry topics

Structure of AtomEquilibriumChemical Bonding and Molecular StructureRedox ReactionsClassification of Elements and Periodicity in PropertiesHydrocarbonsSome Basic Concepts of ChemistryChemical Changes, Reactions & Atmospheric Pollution