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Group 14 Elements

chemistry GATE IIT JEE Engineering Entrance Group 14 ElementsGroup 14 Elements: The Carbon FamilyChemistry - CYMode of OccurrenceMinerals and OresEmission Spectrum of Hydrogen AtomEmission SpectraPhysical ChemistryChemistryChemistry

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Questions

Question 1 Multiple Choice (Single Answer)

Which of the following sets represents three-dimensional silicates only?

  1. Feldspars, Zeolites, Quartz
  2. Micas, Zeolites, Clay
  3. Asbestos, Quartz, Beryl
  4. Micas, Clay, Asbestos
  5. Zeolites, Micas, Quartz
Question 2 Multiple Choice (Single Answer)

Which of the following pairs of silicates has the same general formula?

  1. Chain silicates and double chain silicates
  2. Double chain silicates and sheet silicates
  3. Sheet silicates and cyclic silicates
  4. Cyclic silicates and chain silicates
  5. Cyclic silicates and double sheet silicates
Question 3 Multiple Choice (Single Answer)

Which of the following sets represents orthosilicates only?

  1. Thortveitite, Phenacite, Willemite
  2. Benitoite, Beryl, Phenacite
  3. Willemite, Zircone, Kaolinite
  4. Phenacite, Willemite, Zircone
  5. Beryl, Thortveitite, Kaolinite
Question 4 Multiple Choice (Single Answer)

Which of the following sets represents carbonate ores only?

  1. Dolomite, Azurite, Chalcopyrite, Malachite
  2. Cassiterite, Pyrolusite, Azurite, Galena
  3. Pyrolusite, Magnetite, Siderite, Malachite
  4. Dolomite, Azurite, Siderite, Malachite
  5. Magnetite, Chalcopyrite, Malachite, Galena
Question 5 Multiple Choice (Single Answer)

Which of the following sets represents soft acids only?

  1. Ni(0), Cu(I), Mg(II), Al(III)
  2. Ni(0), Cu(I), Hg(II), Pt(II)
  3. Cu(I), Cu(II), Hg(II), Fe(III)
  4. Ag(I), Au(I), Zn(II), Mg(II)
  5. Li(I), Ca(II), Al(III), Si(IV)
Question 6 Multiple Choice (Single Answer)

Which of the following statements is true?

  1. Ionic bond is non-directional.
  2. Ionic compounds do not conduct electricity in their molten state.
  3. Ionic compounds are highly soluble in non-polar solvents.
  4. The rates of ionic reactions are very slow.
  5. Ionic compounds have very low high melting and boiling points.
Question 7 Multiple Choice (Single Answer)

Which of the following compounds are the examples of reverse spinel?

  1. MgAl2O4 and Mn3O4
  2. Fe3O4 and Mn3O4
  3. MgAl2O4 and NiFe2O4
  4. Fe3O4 and NiFe2O4
  5. Fe3O4 and Co3O4
Question 8 Multiple Choice (Single Answer)

The hydrogen emission spectrum consists of several series of lines named after their discoverers. Which of the following spectral series of lines are found in the infrared region?

  1. Lyman, Balmer and Paschen series
  2. Balmer, Paschen and Pfund series
  3. Paschen, Brackett, and Pfund series
  4. Paschen, Balmer and Pfund series
  5. Lyman, Balmer and Pfund series
Question 9 Multiple Choice (Single Answer)

Which of the following statements is false?

  1. Hydrogen has the simplest line spectrum among all the elements.
  2. Absorption spectrum forms when atoms or molecules are excited from lower energy level to higher energy levels.
  3. Emission spectrum forms when atoms or molecules are de-excited from higher energy level to lower energy level.
  4. Line spectra are also known as molecular spectra.
  5. Band spectrum forms due to the vibrations and rotations of atoms in molecules.
Question 10 Multiple Choice (Single Answer)

Which of the following statements is incorrect?

  1. Hard and Soft Acids and Bases (HSAB) theory was introduced by Pearson.
  2. Hard acids prefer binding to the soft bases.
  3. Hard acids have high energy LUMOs, and hard bases have high energy HOMOs.
  4. Hard acids and bases are small and non-polarisable.
  5. Soft acids and bases are larger and more polarisable.
Question 11 Multiple Choice (Single Answer)

Which of the following types of solids involve hydrogen bonding, dipole-dipole interaction and London dispersion forces?

  1. Ionic solids
  2. Metallic solids
  3. Molecular solids
  4. Network solids
  5. All of the above
Question 12 Multiple Choice (Single Answer)

For which of the following lattice systems is the highest number of Bravais lattices possible?

  1. Cubic
  2. Tetragonal
  3. Orthorhombic
  4. Rhombohedral
  5. Monoclinic
Question 13 Multiple Choice (Single Answer)

Which of the following matchings is not correct?

  1. Cubic: a = b = c and α = β = γ = 90o
  2. Tetragonal: a = b ≠ c and α = β = γ = 90o
  3. Orthorhombic: a ≠ b ≠ c and α = β = γ = 90o
  4. Rhombohedral: a = b = c and α = β = γ ≠ 90<sup style="font-family:">o
  5. Monoclinic: a ≠ b ≠ c and α ≠ β ≠ γ ≠ 90o
Question 14 Multiple Choice (Single Answer)

Which of the following statements about chemisorption is not true?

  1. Adsorbate molecules are bound to the surface of adsorbent by chemical bonds.
  2. Chemisorption is an endothermic process.
  3. This process increases with increase in surface area of the adsorbent.
  4. This process is highly specific in nature.
  5. It is also known as activated adsorption.
Question 15 Multiple Choice (Single Answer)

Which of the following statements is true?

  1. The reference calomel electrode is made from HgCl2.
  2. Electrolysis involves oxidation and reduction respectively at cathode and anode.
  3. The standard electrode potential is measured by galvanometer.
  4. If a salt bridge is removed between the two half cells, the voltage will drop to zero.
  5. In electroplating, the article to be electroplated serves as cathode.
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