1.

    Blow holes of steel are removed by adding:

    A

    C

    B

    Ni

    C

    Sand

    D

    Spiegeleisen

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:d- and f-Block Elements
    🎯Topic:Characteristic Properties
    🎓 Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Steelmaking, Metallurgy

    Related Questions

    1.

    When steam is passed over heated iron, one of the products is:

    A

    FeO

    B

    Fe2O3{\rm{F}}{{\rm{e}}_2}{{\rm{O}}_3}

    C

    Fe3O4{\rm{F}}{{\rm{e}}_3}{{\rm{O}}_4}

    D

    FeSO4{\rm{FeS}}{{\rm{O}}_4}

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:d- and f-Block Elements
    🎯Topic:Characteristic Properties
    🎓 Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Reaction of metals with steam, Iron oxides

    2.

    Which of the following is not a member of 3d3d-transition series?

    A

    Fe{\rm{Fe}}

    B

    Co{\rm{Co}}

    C

    Au{\rm{Au}}

    D

    Cu{\rm{Cu}}

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:d- and f-Block Elements
    🎯Topic:Characteristic Properties
    🎓 Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :transition metals, periodic table, d-block elements

    3.

    Most of the transition metals are paramagnetic due to the presence of:

    A

    Completed dd-orbitals

    B

    Completed ff-orbitals

    C

    Unpaired electrons

    D

    None of these

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:d- and f-Block Elements
    🎯Topic:Characteristic Properties
    🎓 Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :paramagnetism, transition metals, electron configuration

    4.

    Ferrous sulphate on heating gives:

    A

    SO3{\rm{S}}{{\rm{O}}_3}

    B

    SO2{\rm{S}}{{\rm{O}}_2}

    C

    Fe2O3{\rm{F}}{{\rm{e}}_2}{{\rm{O}}_3}

    D

    All of these

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:d- and f-Block Elements
    🎯Topic:Characteristic Properties
    🎓 Ncert Level:Understanding
    🎯Difficulty :Easy
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Thermal decomposition, Chemical reactions, Iron chemistry, Sulphur oxides

    5.

    All the metals form oxides of the type MOMO except

    A

    Copper

    B

    Barium

    C

    Silver

    D

    Lead

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:d- and f-Block Elements
    🎯Topic:Characteristic Properties
    🎓 Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Oxidation states, Transition metals, Alkali earth metals, Group 14 metals

    6.

    Which one of the following forms a complex of coordination number 2 with excess of CN−{\rm{C}}{{\rm{N}}^ - } ions?

    A

    Cu+{\rm{C}}{{\rm{u}}^ + }

    B

    Ag+{\rm{A}}{{\rm{g}}^ + }

    C

    Ni2+{\rm{N}}{{\rm{i}}^{2 + }}

    D

    Fe2+{\rm{F}}{{\rm{e}}^{2 + }}

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:d- and f-Block Elements
    🎯Topic:Characteristic Properties
    🎓 Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Coordination Chemistry, Coordination Number, Complex Formation, Transition Metals

    7.

    Which of the following statement is wrong for the d-block elements

    A

    They show variable oxidation states.

    B

    Their compounds are generally coloured.

    C

    They have catalytic properties.

    D

    They have completely filled d orbitals in ground state or common oxidation state.

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:d- and f-Block Elements
    🎯Topic:Characteristic Properties
    🎓 Ncert Level:Understanding
    🎯Difficulty :Easy
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :d-block elements, electronic configuration, variable valency, periodic table

    8.

    Ferric sulphate on heating gives:

    A

    SO2  and  SO3{\rm{S}}{{\rm{O}}_2}{\rm{\;and\;S}}{{\rm{O}}_3}

    B

    SO2{\rm{S}}{{\rm{O}}_2} only

    C

    SO3{\rm{S}}{{\rm{O}}_3} only

    D

    S only

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:d- and f-Block Elements
    🎯Topic:Characteristic Properties
    🎓 Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Thermal decomposition, Chemical reactions, Metal sulfates

    9.

    Platinum metal can be dissolved in:

    A

    Hot concentrated hydrochloric acid

    B

    Hot concentrated nitric acid

    C

    Hot dilute sulphuric acid

    D

    A mixture of hydrochloric and nitric acids

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:d- and f-Block Elements
    🎯Topic:Characteristic Properties
    🎓 Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :solubility, noble metals, aqua regia, chemical reactivity

    10.

    Which form of iron is least ductile?

    A

    Hard steel

    B

    Cast iron

    C

    Mild steel

    D

    Wrought steel

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:d- and f-Block Elements
    🎯Topic:Characteristic Properties
    🎓 Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :ductility, material properties of iron, different forms of iron

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