Chemistry Quiz: Solutions and Reactions
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Questions and Answers

What is the relationship between the assertion and reason given in Question 75?

  • Both the assertion and reason are true, but the reason is not the correct explanation of the assertion.
  • Both the assertion and reason are false. (correct)
  • Both the assertion and reason are true, and the reason is the correct explanation of the assertion.
  • The assertion is true, but the reason is false.

    • Which of the following statements correctly describes the volume of a solution when a solute is dissolved in a solvent?

  • The volume of the solution increases as compared to the volume of the solvent.
  • The volume of the solution remains equal to the volume of the solvent.
  • The volume of the solution becomes less than that of the solvent.
  • The volume of the solution may vary depending on conditions. (correct)

    • Which of the following is the monomer that makes up natural rubber?

  • Epoxide
  • Isoprene (correct)
  • Tetrafluoroethylene
  • Styrene

    • Which of the following pairs of liquids could be used as propellants for rockets?

    <p>Liquid hydrogen + liquid oxygen (B)</p> Signup and view all the answers

    Based on the chemical reactions described in Question 79, what are the identities of Solid X and Gas Y?

    <p>Solid X: Zinc nitrate, Gas Y: Ammonia (A)</p> Signup and view all the answers

    Which defect involves a cation occupying an interstitial site within a crystal lattice?

    <p>Frenkel defect (A)</p> Signup and view all the answers

    What is the primary purpose of adding concentrated HNO$_3$ before testing for Group III cations?

    <p>To convert Fe$^{2+}$ to Fe$^{3+}$ (A)</p> Signup and view all the answers

    In which of the following oxygen species is the O-O bond the strongest?

    <p>O$_2^+$ (D)</p> Signup and view all the answers

    Which instrument is specifically designed to measure the rotation of plane-polarized light?

    <p>Polarimeter (D)</p> Signup and view all the answers

    The stability of a lyophobic colloid is primarily attributed to which of the following?

    <p>Electrical double layer at the particle surface (A)</p> Signup and view all the answers

    Which of these options is NOT a part of Green Chemistry Principles?

    <p>Cleaning-up waste is a preferred method. (D)</p> Signup and view all the answers

    From an economical perspective, which type of reaction is the least favored?

    <p>Elimination reaction (C)</p> Signup and view all the answers

    What is considered the most important and versatile green solvent?

    <p>Water (B)</p> Signup and view all the answers

    Which set of compounds displays an increasing oxidation state of the metal?

    <p>Cu2O, CrO2, V2O5, CrO3 (C)</p> Signup and view all the answers

    In mass spectroscopy, which species is used to bombard the sample?

    <p>electrons (A)</p> Signup and view all the answers

    Which method is NOT a chemical method of quantitative analysis?

    <p>Magnetic Susceptibility (B)</p> Signup and view all the answers

    Which ion has the maximum number of unpaired electrons?

    <p>Fe$^{3+}$ (B)</p> Signup and view all the answers

    What are the oxidation and coordination number of Cobalt in $Co(NH_3)_4(H_2O)(Br)_2$?

    <p>+3 and 6 (D)</p> Signup and view all the answers

    How is polystyrene best classified?

    <p>addition polymer or thermoplastic polymer (B)</p> Signup and view all the answers

    11 grams of carbon dioxide are produced via the combustion of methane. How many moles of methane are required?

    <p>0.25 (A)</p> Signup and view all the answers

    In the reaction 2KClO$_3$(s) -> 2KCl(s) + 3O$_2$(g), which set shows the lowest and highest oxidation states, respectively?

    <p>Cl in KClO$_3$ and Cl in KCl (A)</p> Signup and view all the answers

    Which metal ion is essential for muscle contraction?

    <p>Ca$^{2+}$ (B)</p> Signup and view all the answers

    What combination of compounds results in the bluish-green color in the copper borax bead test?

    <p>Copper sulphate and sodium metaborate. (C)</p> Signup and view all the answers

    What is the ratio of 10 milligrams to 5 nanograms?

    <p>2 x 10$^{3}$ : 1 (C)</p> Signup and view all the answers

    An element X with outermost electrons in 2p$^{2}$ combines with element Y with outermost electrons in 2p$^{1}$. How many atoms of Y will be present per molecule in the resulting compounds?

    <p>2 and 3 (B)</p> Signup and view all the answers

    Which type of intermolecular force is described by Debye forces?

    <p>Dipole-induced dipole interactions. (B)</p> Signup and view all the answers

    Which of the following lists the salts in increasing order of their lattice energies?

    <p>BeBr$_2$, Cal$_2$, LiF, KCI (D)</p> Signup and view all the answers

    Which of the following is NOT a correct functional group of an organic compound?

    <p>Isocyano (D)</p> Signup and view all the answers

    Which set of molecules exhibits a trigonal bipyramidal geometry?

    <p>XeO$_3$F$_2$ and [XeF$_5$]$^+$ (C)</p> Signup and view all the answers

    What is the correct name for the compound with the formula CH3(CH2)2CHBrCH2CH3?

    <p>3-bromohexane (B)</p> Signup and view all the answers

    What is the SI unit for the gas constant (R) in the ideal gas equation?

    <p>Pa m<sup>3</sup> mol<sup>-1</sup> K<sup>-1</sup> (C)</p> Signup and view all the answers

    Which property is shared by both crystalline solids and liquid crystals?

    <p>Long-range order in molecular arrangement (D)</p> Signup and view all the answers

    Which pair of liquids are completely miscible with each other?

    <p>Benzene and toluene (A)</p> Signup and view all the answers

    What is the compound X that reacts with zinc amalgam and HCl to form Y, which then reacts with bromine at 127°C to give mainly 2-bromopropane?

    <p>Acetone (D)</p> Signup and view all the answers

    Which molecule is known to violate the VSEPR theory due to its unexpected molecular geometry?

    <p>IF<sub>5</sub> (Iodine pentafluoride) (C)</p> Signup and view all the answers

    Why is anisole more reactive than toluene?

    <p>The -OCH<sub>3</sub> group is an electron donating group. (B), The -OCH<sub>3</sub> group exhibits mesomeric effect. (C)</p> Signup and view all the answers

    Which statement regarding the first law of thermodynamics is correct?

    <p>In a cyclic process, $q = -w$ (A)</p> Signup and view all the answers

    What is the molar mass of a substance if 5g is dissolved in 150g of benzene resulting in a molality of approximately 0.55 mol kg-1?

    <p>60 (B)</p> Signup and view all the answers

    What type of colloid is formed by the dispersion of a gas in a liquid?

    <p>Fog (D)</p> Signup and view all the answers

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