1. Physical chemistry
    2. 1. The solid state
    2. Language of Chemistry
    3. Gaseous and Liquid states
    4. Stoichiometry
    5. Solutions
    6. Structure of Atom
    7. Chemical equilibrium
    8. Nuclear chemistry (Radioactivity)
    9. Ionic equilibrium
    10. Chemical Bonding
    11. Chemical kinetics
    12. Concepts of Acids, Bases and Salts
    13. Surface catalysis and Colloids
    14. Redox reactions
    15. Chemical energetics
    16. Volumetric analysis
    17. Electrochemistry
  2. Inorganic chemistry
    3. 18. Introduction
    19. Periodic table
    20. Hydrogen and its compounds
    21. General aspects of Metallergy
    22. Alkali metals
    23. Alkaline metals
    24. Boron family
    25. Carbon family
    26. Nitrogen family
    27. Oxygen family
    28. Fluorine family
    29. Inert gases
    30. Transition metals
    31. Coordination compounds
    32. Analytical chemistry
  3. Organic chemistry
    4. 33. Purification and analysis of organic compounds
    34. Nomenclature of Organic compounds
    35. Reaction Mechanisms
    36. Hydrocarbons
    37. Haloalkanes (Alkyl halides)
    38. Alcohol, Phenol and Ether
    39. Aldehyde and Ketones
    40. Carboxylic acids
    41. Compounds conatining Nitrogen
    42. Polymers
    43. Chemistry in daily life
Inorganic chemistry
24. Boron family
1. Which one of the following is most abundant in the earth crust?
  • Al
  • B
  • In
  • Ga
2. Melting point is highest for
  • B
  • Al
  • Ga
  • In
3. Which of the following is the smallest cation?
  • Na+
  • Mg2+
  • Ca2+
  • Al3+
4. Which of the following minerals does not contain Al?
  • Cryolite
  • Mica
  • Feldspar
  • Fluorspar
5. The chief ore of aluminium is
  • Alunite
  • Bauxite
  • Cryolite
  • Felspar
6. The chemical composition of cryolite mineral is
  • Al2O3
  • Al2O3.12H2O
  • KAlS3O8
  • Na3AlF6
7. Corundum is an ore of
  • Cu
  • Zn
  • Al
  • Mg
8. Aluminium is extracted by the electrolysis of
  • Bauxite
  • Alumina
  • Alumina mixed with molten cryolite
  • Molten cryolite
9. A layer of coke is spread over bauxite during extraction of aluminium. This acts as a/an
  • Flux
  • Slag to remove impurities
  • Reducing agent
  • Insulation and does not allow heat to escape
10. In the extraction of aluminium the electrolyte is
  • Fused cryolite with felspar
  • Fused cryolite with fluorspar
  • Pure alumina in molten cryolite
  • Pure alumina with bauxite and molten cryolite
11. Aluminium is obtained by
  • Reducing Al2O3 with coke
  • Electrolysing Al2O3, dissolved in Na3AlF6
  • Reducing Al2O3 with chromium
  • Heating alumina and cryolite
12. In the electrolysis of alumina, cryolite is added to
  • Increase the melting point of alumina
  • Increase the electrical conductivity
  • Minimise the anodic effect
  • Remove impurities from alumina
13. Electrolytic reduction of alumina to aluminium by Hall-Heroult process is carried out
  • In the presence of NaCl
  • In the presence of fluorite
  • In the presence of cryolite which forms a melt with lower melting temperature
  • In the presence of cryolite which forms a melt with high melting temperature
14. The function of fluorspar in the electrolytic reduction of alumina dissolved in fused cryolite (Na3AlF6) is
  • As a catalyst
  • To lower the temperature of the melt and to make the fused mixture very conducting
  • To decrease the rate of oxidation of carbon at the anode
  • None of the above
15. Which metal is extracted only by electrolytic reduction?
  • Al
  • Ag
  • Cu
  • Fe
16. Aluminium metal is refined by

[IOM]

  • Serpeck's process
  • Baeyer's process
  • Hoop's process
  • Hall's process
17. Aluminium becomes passive in
  • Conc. HNO3
  • H2CrO4
  • HClO4
  • All of these
18. Which metal is protected by a layer of its own oxide?
  • Aluminium
  • Silver
  • Gold
  • Iron
19. Aluminium is more reactive than iron. But aluminium is less easily corroded than iron because
  • Aluminium is a noble metal
  • Oxygen forms a protective oxide layer
  • Iron undergoes reaction easily with water
  • Iron forms mono and divalent ions
20. Aluminium vessels should not be washed with materials containing washing soda since
  • Washing soda is expensive
  • Washing soda is easily decomposed
  • Washing soda reacts with aluminium to form soluble aluminate
  • Washing soda reacts with aluminium to form insoluble aluminium oxide
21. Which of the following process does not involve a catalyst?
  • Haber's process
  • Thermite process
  • Contact process
  • Ostwald process
22. Thermite is a mixture of
  • 3 parts of powdered Al and 1 part of Fe2O3
  • 1 part of powdered Al and 3 parts of Fe2O3
  • 1 part of powdered Al and 1 part of Fe2O3
  • 2 parts of powdered Al and 1 part of Fe2O3
23. In thermite process which of the following is used as a reducing agent?

[IOM, MOE]

  • Al
  • Fe
  • Mg
  • C
24. In thermite welding process we use
  • Al powder
  • Fe powder
  • Ca powder
  • Al + Fe mixture
25. Which of the following bases will react with alkalies?
  • Cu2O
  • CuO
  • MgO
  • Al2O3
26. Aluminium oxide is not reduced by chemical reactions since
  • Aluminium oxide is highly stable
  • Aluminium oxide is reactive
  • Reducing agents contaminate
  • The process pollutes the environment
27. Substance soluble in NaOH is
  • Ba(OH)2
  • Cu(OH)2
  • Fe(OH)2
  • Al(OH)3
28. Anhydrous AlCl3 fumes in moist air because of
  • Dehydration
  • Hydrolysis
  • Hydration
  • Oxidation
29. Aluminium (III) chloride forms a dimer because
  • Aluminium has high ionization energy
  • It cannot form a trimer
  • Higher coordination number can be achieved by aluminium
  • Aluminium belongs to third group
30. Common alum is
  • K2SO4.Al2(SO4)3.24H2O
  • K2SO4.Cr2(SO4)3.24H2O
  • K2SO4.Fe2(SO4)3.24H2O
  • (NH4)2SO4.FeSO4.6H2O
31. Which of the following does not form alum?
  • Li+
  • Na+
  • K+
  • NH4+
32. Aqueous solution of potash alum is
  • Acidic
  • Alkaline
  • Neutral
  • Not definite
33. Potash alum is water soluble and ionises in aqueous solution to give
  • Only one type of ion
  • Two types of ions
  • Three types of ions
  • Four types of ions
34. The important source of boron is
  • Calamine
  • Carnalite
  • Colemanite
  • Cryolite
35. H3BO3 is
  • Monobasic and weak Lewis acid
  • Monobasic and weak Bronsted acid
  • Monobasic and strong Lewis acid
  • Tribasic and weak Bronsted acid
36. Which one of the following is not an electron deficient compound?
  • BCl3
  • AlCl3
  • Al2Cl6
  • B2H6
37. Three centred bond is present in
  • NH3
  • B2H6
  • BCl3
  • AlCl3
38. The hardest compound of boron is
  • Boron carbide
  • Boron nitride
  • Silicon boride
  • Magnesium boride
39. Borazole is known as
  • Organic benzene
  • Organic compound
  • Inorganic benzene
  • Inorganic compound
40. Chemically borax is
  • Sodium metaborate
  • Sodium orthoborate
  • Sodium tetraborate
  • Sodium tetraborate decahydrate
41. Borax is prepared by treating colemanite with
  • NaNO3
  • NaCl
  • Na2CO3
  • NaHCO3
42. In the borax bead test of Co2+, the blue colour of bead is due to the formation of
  • CoO
  • Co(BO2)2
  • CO3O4
  • B2O3
43. Borax bead test is not given by
  • Cobalt salts
  • Copper salts
  • Aluminium salts
  • Nickel salts
44. In diborane
  • 4 bridged hydrogens and two terminal hydrogens are present
  • 2 bridged hydrogens and four terminal hydrogens are present
  • 3 bridged and three terminal hydrogens are present
  • None of the above
45. In diborane, banana bond is formed between
  • 2 electrons, 3 atoms
  • 2 electrons, 1 atom
  • 2 electrons, 2 atom
  • 1 electron, 2 atoms
46. Which one is a Lewis acid?
  • PCl3
  • AlCl3
  • NCl3
  • AsCl3
47. Which of the following is the strongest Lewis acid?
  • BI3
  • BBr3
  • BCl3
  • BF3
48. Aluminium is most abundant in earth crust, yet it is obtained from bauxite because
  • Bauxite is available in large quantity
  • Of easy extraction of aluminium from it
  • Bauxite contains maximum aluminium
  • Bauxite is less impure
49. Anhydrous AlCl3 is prepared from
  • Conc. HCl and aluminium metal
  • Aluminium and Cl2
  • Dry HCl gas + heated aluminium metal
  • Dil. HCl and aluminium metal
50. The process of converting hydrated alumina into anhydrous alumina is called
  • Roasting
  • Smelting
  • Dressing
  • Calcination