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Indian Navy 10+2 B.Tech Cadet Chemical Equilibrium — practice questions

Explore 66 free Chemical Equilibrium questions in Indian Navy 10+2 B.Tech Cadet Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Chemical Equilibrium questions and exercises with answers

Showing questions 1–30 of 66.

The minimum energy required to remove an electron from the ground state of a hydrogen atom is:Read the answer and worked solution →Le Chatelier's principle states that a system at equilibrium responds to a stress by:Read the answer and worked solution →pOH of a solution with pH = 8.5 (at 25°C):Read the answer and worked solution →In a saturated solution of AgCl, [Ag+] = 1.26 × 10⁻⁵. If KNO3 is added (no common ion), solubility of AgCl:Read the answer and worked solution →According to VSEPR theory, the shape of a molecule is determined byRead the answer and worked solution →The hybridisation of carbon in methane (CH₄) isRead the answer and worked solution →As per your syllabus, given [N₂] = 1.5×10⁻² M, [H₂] = 3.0×10⁻² M, [NH₃] = 1.2×10⁻² M at 500 K, what is Kc for N₂ + 3H₂ ⇌ 2NH₃?Read the answer and worked solution →As per your syllabus, if Kc > 10³, what does this magnitude indicate about the reaction at equilibrium?Read the answer and worked solution →As per your syllabus, given ΔG° = 13.8 kJ/mol at 298 K for glucose phosphorylation, the value of Kc is closest to which?Read the answer and worked solution →As per your syllabus, the conjugate base of a STRONG acid is necessarily which kind of base?Read the answer and worked solution →A BUFFER solution is best described as:Read the answer and worked solution →What is the valency of an element with electronic configuration 2, 8, 3?Read the answer and worked solution →Which of the following elements does not lose an electron easily?Read the answer and worked solution →Arrange the following elements in the order of their decreasing metallic character Na, Si, Cl, Mg, AlRead the answer and worked solution →Arrange the following elements in the order of their increasing non-metallic character Li, O, C, Be, FRead the answer and worked solution →On moving from left to right in a period in the periodic table, the size of the atom.Read the answer and worked solution →Order the atomic models as they were proposedRead the answer and worked solution →Match each scientist to their modelRead the answer and worked solution →Match each model to what it could NOT explainRead the answer and worked solution →True or false: Rutherford's modelRead the answer and worked solution →True or false: Bohr's modelRead the answer and worked solution →Complete the reason Bohr's model failsRead the answer and worked solution →Which model does this belong to?Read the answer and worked solution →Match each quantum number to what it is calledRead the answer and worked solution →True or false: the quantum mechanical modelRead the answer and worked solution →Order the structure: from atom down to electronRead the answer and worked solution →Complete the (n + l) ruleRead the answer and worked solution →True or false: orbital energiesRead the answer and worked solution →Match each rule to what it forbids or requiresRead the answer and worked solution →Tap every statement Hund's rule requiresRead the answer and worked solution →

Worked practice questions

The minimum energy required to remove an electron from the ground state of a hydrogen atom is:

  1. $3.4\,\text{eV}$
  2. $13.6\,\text{eV}$
  3. $27.2\,\text{eV}$
  4. $1.51\,\text{eV}$
Show answer and solution

Correct answer: B. $13.6\,\text{eV}$

Ionisation energy is the energy required to take the electron from $n = 1$ to $n = \infty$. $E_\infty - E_1 = 0 - (-13.6) = 13.6\,\text{eV}$. The value $27.2\,\text{eV}$ is the magnitude of the potential energy in the ground state, not the ionisation energy.

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Le Chatelier's principle states that a system at equilibrium responds to a stress by:

  1. Doing nothing
  2. Always going backward
  3. Always going forward
  4. Shifting in a direction that partially offsets the stress
Show answer and solution

Correct answer: D. Shifting in a direction that partially offsets the stress

The system shifts in a direction that partially counteracts (offsets) the change applied. Applies to temperature, pressure, concentration changes.

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pOH of a solution with pH = 8.5 (at 25°C):

  1. 9.5
  2. 8.5
  3. 6.5
  4. 5.5
Show answer and solution

Correct answer: D. 5.5

At 25°C, pH + pOH = 14. So pOH = 14 - 8.5 = 5.5. Solution is mildly basic (pH > 7).

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More Chemistry topics

Alcohols Phenols EthersOrganic ChemistryAlkenesPolymersAtoms and MoleculesStates of MatterClassification of ElementsClassification of Elements and Periodicity