1.

    The colour of Mohr’s salt, (NH4)2SO4Fe(SO4).6H2O{\left( {{\rm{N}}{{\rm{H}}_4}} \right)_2}{\rm{S}}{{\rm{O}}_4}{\rm{Fe}}\left( {{\rm{S}}{{\rm{O}}_4}} \right).6{{\rm{H}}_2}{\rm{O}} is:

    A

    White

    B

    Green

    C

    Violet

    D

    Blue

    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 metal complexes, coordination chemistry, color of metal ions

    Related Questions

    1.

    The colour of CuCr2O7{\rm{CuC}}{{\rm{r}}_2}{{\rm{O}}_7} solution in water is green because:

    A

    Cu2+{\rm{C}}{{\rm{u}}^{2 + }} ions is green

    B

    Cr2O72−{\rm{C}}{{\rm{r}}_2}{\rm{O}}_7^{2 - } ion is green

    C

    Both the ions are green

    D

    Cu2+{\rm{C}}{{\rm{u}}^{2 + }} ion is blue and Cr2O72−{\rm{C}}{{\rm{r}}_2}{\rm{O}}_7^{2 - } ion is yellow

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:d- and f-Block Elements
    🎯Topic:Characteristic Properties
    🎓 Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Transition metal ion colors, Color mixing

    2.

    Zr and Y have about the same radius

    A

    The lanthanide contraction.

    B

    Relativistic effects on orbital energies.

    C

    The similar number of electrons in their valence shells.

    D

    Their similar electronegativities.

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:d- and f-Block Elements
    🎯Topic:Characteristic Properties
    🎓 Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :solubility rules, acid-base reactions, ionic compounds

    3.

    The term ‘fool’s gold’ is used for a mineral which shines like gold. It is:

    A

    Iron pyrite

    B

    Copper glance

    C

    Cinnabar

    D

    Cadmium sulphide

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

    4.

    dd-block elements generally form:

    A

    Covalent hydrides

    B

    Metallic hydrides

    C

    Interstitial hydrides

    D

    Salt-like hydrides

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

    5.

    Which metal gives hydrogen gas on heating with hot concentrated alkali?

    A

    Ag

    B

    Ni

    C

    Zn

    D

    Cu

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:d- and f-Block Elements
    🎯Topic:Characteristic Properties
    🎓 Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Reactivity of metals, Reaction with alkali, Hydrogen gas production

    6.

    Brass is an alloy of:

    A

    Zn and Cu

    B

    Cu and Sn

    C

    Zn and Sn

    D

    Cu, Zn and sn

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:d- and f-Block Elements
    🎯Topic:Characteristic Properties
    🎓 Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Alloys, Composition of Brass

    7.

    The first man-made atom is:

    A

    Os

    B

    Na

    C

    Zr

    D

    Tc

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

    8.

    Transuranic elements begins with

    A

    Np

    B

    Cm

    C

    Pu

    D

    U

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

    9.

    Which statement about corrosive sublimate is incorrect?

    A

    It is prepared by heating mercury in chlorine

    B

    It reduces stannic chloride

    C

    It oxidizes stannous chloride

    D

    It sublimes readily

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:d- and f-Block Elements
    🎯Topic:Characteristic Properties
    🎓 Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Corrosive sublimate, Mercury(II) chloride, Redox reactions, Sublimation

    10.

    Among the following, the compound that is both paramagnetic and coloured is

    A

    (NH4)2(TiCl6){\left( {{\rm{N}}{{\rm{H}}_4}} \right)_2}\left( {{\rm{TiC}}{{\rm{l}}_6}} \right)

    B

    K2Cr2O7{{\rm{K}}_2}{\rm{C}}{{\rm{r}}_2}{{\rm{O}}_7}

    C

    K3[Cu(CN)4]{{\rm{K}}_3}\left[ {{\rm{Cu}}{{\left( {{\rm{CN}}} \right)}_4}} \right]

    D

    VOSO4{\rm{VOS}}{{\rm{O}}_4}

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:d- and f-Block Elements
    🎯Topic:Characteristic Properties
    🎓 Ncert Level:Analyzing
    🎯Difficulty :Medium
    ⚡ Time Required :3 mins
    🔄Ncert Concepts :Paramagnetism, Color of transition metal complexes, Electronic configuration, Oxidation state

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