Start learning →

Indian Navy Pilot States of Matter — practice questions

Explore 56 free States of Matter questions in Indian Navy Pilot Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

Practise States of Matter with Quill →

States of Matter questions and exercises with answers

Showing questions 1–30 of 56.

Charles's law for a fixed amount of gas at constant pressure states that:Read the answer and worked solution →The radius of the $n$-th Bohr orbit of a hydrogen-like atom of atomic number $Z$ varies as:Read the answer and worked solution →As per your syllabus, for an ADIABATIC process (no heat exchange, q = 0), the first law reduces to which form?Read the answer and worked solution →As per your syllabus, a reaction with ΔH < 0 AND ΔS > 0 is spontaneous under which condition?Read the answer and worked solution →Which trend is followed by ionisation energy across a period?Read the answer and worked solution →Three elements B, Si and Ge areRead 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 →The fundamental particlesRead the answer and worked solution →Assertion and reasonRead the answer and worked solution →Two are true, one is notRead the answer and worked solution →Three of these are wrong. Find the one that holds.Read the answer and worked solution →Which principle is being described?Read the answer and worked solution →Flip and pair: symbol with meaningRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Tap every statement true of the Schrodinger modelRead the answer and worked solution →Reading the models backRead the answer and worked solution →Assertion and reason: filling orbitalsRead the answer and worked solution →

Worked practice questions

Charles's law for a fixed amount of gas at constant pressure states that:

  1. $V \propto T^2$
  2. $V$ is independent of $T$
  3. $V \propto T$ (Kelvin)
  4. $V \propto 1/T$
Show answer and solution

Correct answer: C. $V \propto T$ (Kelvin)

Charles's law: at fixed $P$ and $n$, volume is directly proportional to absolute temperature ($T$ in Kelvin): $V/T = $ constant. Double the Kelvin temperature, double the volume. The key subtlety is that $T$ must be in Kelvin, not Celsius — Charles's law fails badly if you use Celsius (a gas at $0°$C has nonzero volume). Graphically, $V$ vs $T$ (Kelvin) is a straight line passing through the origin.

Open this question →

The radius of the $n$-th Bohr orbit of a hydrogen-like atom of atomic number $Z$ varies as:

  1. $r \propto n / Z^2$
  2. $r \propto Z / n^2$
  3. $r \propto n^2 / Z$
  4. $r \propto Z n^2$
Show answer and solution

Correct answer: C. $r \propto n^2 / Z$

From Bohr's derivation, $r_n = \dfrac{n^2 h^2}{4\pi^2 m k Z e^2}$, hence $r_n \propto n^2 / Z$. **Therefore higher orbits are larger ($n^2$) and higher-$Z$ atoms hold their electrons in tighter orbits ($1/Z$).**

Open this question →

As per your syllabus, for an ADIABATIC process (no heat exchange, q = 0), the first law reduces to which form?

  1. ΔU = w_ad
  2. ΔU = 0
  3. ΔU = q
  4. ΔU = pΔV
Show answer and solution

Correct answer: A. ΔU = w_ad

As per your syllabus, adiabatic: q=0 → ΔU = w_ad. All energy change comes from work.

Open this question →

How to practise

  1. Choose a States of Matter question and try to work out your answer.
  2. Open the question to check the correct answer and read its worked solution.
  3. Continue in the app for bite-sized lessons, explanations and review with Quill. You can start without creating an account.

More Chemistry topics

Alcohols Phenols EthersAlkenesOrganic ChemistryPolymersChemical EquilibriumAtoms and MoleculesClassification of ElementsClassification of Elements and Periodicity