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Mixed Test (Chemistry)

Mixed Test (Chemistry)

13 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

Which of the following is an incorrect statement regarding the extraction of metals?

  1. Extraction of gold is carried out by cyanide process.
  2. Iron is extracted by using carbon reduction method.
  3. Extraction of tin metal involves the carbon reduction process.
  4. Aluminium acts as a reducing agent in aluminothermite process.
  5. Copper is extracted from its ores by carbon reduction method.
Question 2 Multiple Choice (Single Answer)

In which of the following copper minerals is maximum copper content found?

  1. Chalcocite
  2. Covellite
  3. Malachite
  4. Cuprite
  5. Azurite
Question 3 Multiple Choice (Single Answer)

Which pair of 'coordination complex: IUPAC name’ is not correctly matched?

  1. [Co(NH3)5ONO]2+: pentaamminenitritocobalt(III) ion
  2. K3[Co(C2O4)3]: potassium trioxalatocobaltate(II)
  3. [Cr(NH3)6][IrCl6]: hexaamminechromium(III) hexachloroiridate(III)
  4. [Cr(H2O)5Br]SO4: pentaaquabromochromium(III) sulphate
  5. [Cu(H2O)4]SO4: tetraaquacopper(II) sulphate
Question 4 Multiple Choice (Single Answer)

Which of the following combinations of ‘limiting radius ratio: coordination number- shape’ is not correctly matched?

  1. < 0.155 : 2- linear
  2. 0.155 - 0.225 : 3- triangular planar
  3. 0.225 – 0.414 : 4- tetrahedral
  4. 0.414 – 0.732 : 4- square planar
  5. 0.732 – 0.999 : 6- octahedral
Question 5 Multiple Choice (Single Answer)

Which of the following sets represents ferromagnetic elements/molecules only?

  1. MnS, NiO, Fe, Co
  2. Fe, Co, MnO, MnS
  3. MnS, NiO, Co, Ni
  4. Fe, Co, Ni, CrO2
  5. Cr, MnO, MnS, NiO
Question 6 Multiple Choice (Single Answer)

Which of the following pairs has HCP structure?

  1. ZnS, CdCl2
  2. HgI2, CrCl3
  3. CdI2, BiI3
  4. CdI2, CrCl3
  5. HgI2, CdCl2
Question 7 Multiple Choice (Single Answer)

Which pair represents isoelectronic species only?

  1. CN+, NO3+
  2. NO+, CN2-
  3. NO2+, O2-
  4. CN-, O2-
  5. O2-, CN+
Question 8 Multiple Choice (Single Answer)

Which of the following oxides has the lowest melting point?

  1. BeO
  2. MgO
  3. CaO
  4. BaO
  5. SrO
Question 9 Multiple Choice (Single Answer)

Which of the following molecules/ions has the lowest bond angle and two lone pairs of electrons?

  1. H2O
  2. F2O
  3. I3-
  4. NF3
  5. NH3
Question 10 Multiple Choice (Single Answer)

Which set of molecules is expect to be of amphoteric nature?

  1. Al(OH)3, Al2O3, GeO
  2. H2SiO3, SiO2, CO2
  3. Mg(OH)2, PbO, PbO2
  4. PbO, PbO2, GeO
  5. SiO2, GeO, PbO2
Question 11 Multiple Choice (Single Answer)

Which pair represents ionization isomers only?

  1. [Pt(NH3)4] [PtCl4] and [PtCl(NH3)3] [PtCl3(NH3)]
  2. [Co(NH3)6] [Cr(CN)6] and [Cr(NH3)6] [Co(CN)6]
  3. [Cr(H2O)6]Cl3 and [Cr(H2O)5Cl]Cl2.H2O
  4. [Co(NO2)(NH3)5]Cl2 and [Co(ONO)(NH3)5]Cl2
  5. [CoCl2(NH3)4]NO2 and [Co(Cl)(NO2)(NH3)4]Cl
Question 12 Multiple Choice (Single Answer)

Which pair of xenon compounds has trigonal pyramidal and T-shaped geometries respectively?

  1. XeF4, XeOF2
  2. XeF6, XeOF2
  3. XeO3, XeOF2
  4. XeO3, XeF4
  5. XeOF2, XeO2F2
Question 13 Multiple Choice (Single Answer)

Which of the following coordination complexes has d2sp3 hybridization and maximum number of lone pairs of electrons?

  1. [Cr(NH3)6]3+
  2. [Fe(CN)6]4-
  3. [Fe(CN)6]3-
  4. [FeF6]3-
  5. [Co(NH3)6]3+
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