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M.Sc Chemistry Solid State — practice questions

Explore 59 free Solid State questions in M.Sc Chemistry Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Solid State questions and exercises with answers

Showing questions 1–30 of 59.

Crystalline solids are characterised by:Read the answer and worked solution →Which of the following arrangements is in correct order of increasing electronegativity (Pauling scale)?Read the answer and worked solution →The mole fraction of urea ($M = 60\,\text{g/mol}$) in an aqueous solution containing $6\,\text{g}$ of urea in $180\,\text{g}$ of water is approximately:Read the answer and worked solution →For an ideal solution containing two volatile liquids A and B, Raoult's law gives the total vapour pressure as:Read the answer and worked solution →Osmotic pressure of a dilute solution is expressed by van't Hoff's equation as:Read the answer and worked solution →Two solutions are said to be **isotonic** if they:Read the answer and worked solution →If $\mathrm{NaCl}$ undergoes complete dissociation in water, the van't Hoff factor $i$ is:Read the answer and worked solution →Desalination of sea water is best carried out by:Read the answer and worked solution →Drag each clue to its cubic cellRead 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 →

Worked practice questions

Crystalline solids are characterised by:

  1. A short-range ordered arrangement of particles
  2. A long-range, regularly repeating arrangement of particles
  3. No definite shape
  4. The absence of definite melting point
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Correct answer: B. A long-range, regularly repeating arrangement of particles

Crystalline solids have a long-range, periodic arrangement of constituent particles. NaCl, diamond, ice, metals at usual conditions are crystalline. Amorphous solids (glass, rubber) lack long-range order. They show only short-range order (option A), no definite melting point, and fracture along irregular surfaces. Crystallinity is what gives sharp X-ray diffraction patterns and well-defined melting points.

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Which of the following arrangements is in correct order of increasing electronegativity (Pauling scale)?

  1. F < O < N < C
  2. N < C < O < F
  3. C < N < O < F
  4. O < F < N < C
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Correct answer: C. C < N < O < F

Electronegativity increases across a period and decreases down a group. The Pauling-scale values for period 2 nonmetals: - C: 2.55 - N: 3.04 - O: 3.44 - F: 3.98 (highest of any element) So the correct ascending order is **C < N < O < F**. Option A reverses everything. Option C breaks the trend by putting F before O. Memory aid: "FONClBrISCHP" is the electronegativity ladder from highest to lowest among common nonmetals (F first, P last among this set).

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The mole fraction of urea ($M = 60\,\text{g/mol}$) in an aqueous solution containing $6\,\text{g}$ of urea in $180\,\text{g}$ of water is approximately:

  1. $0.010$
  2. $0.005$
  3. $0.100$
  4. $0.050$
Show answer and solution

Correct answer: A. $0.010$

Moles of urea $= 6/60 = 0.10$. Moles of water $= 180/18 = 10.0$. Mole fraction of urea $= 0.10/(0.10 + 10.0) = 0.10/10.10 \approx 0.0099 \approx 0.010$.

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More Chemistry topics

Chemical EquilibriumEquilibriumClassification of Elements and PeriodicityAlkenesIdeal and Non-Ideal SolutionsIdeal SolutionsNon-Ideal SolutionsReactions in Aqueous Solution