1.

    Which oxide of Mn is acidic in nature?

    A

    MnO

    B

    Mn2O7{\rm{M}}{{\rm{n}}_2}{{\rm{O}}_7}

    C

    Mn2O3{\rm{M}}{{\rm{n}}_2}{{\rm{O}}_3}

    D

    MnO2{\rm{Mn}}{{\rm{O}}_2}

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:d- and f-Block Elements
    🎯Topic:Characteristic Properties
    🎓 Ncert Level:Understanding
    🎯Difficulty :Easy
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Oxides, Acidity, Transition Metal Oxides

    Related Questions

    1.

    When MnO2{\rm{Mn}}{{\rm{O}}_2} is fused with KOH, a coloured compound formed, the product and its colour is

    A

    KMnO4KMnO_4, purple

    B

    K2MnO4K_2MnO_4, dark green

    C

    MnO2MnO_2, brown

    D

    MnOMnO, colorless

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:d- and f-Block Elements
    🎯Topic:Characteristic Properties
    🎓 Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :chemical reactions, transition metal chemistry, color of compounds

    2.

    Silver iodide is used to produce artificial rain because:

    A

    It is easily prepared

    B

    Its structure is ice-like

    C

    It can easily be sprayed at high altitude

    D

    It is insoluble in rain water

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

    3.

    An element which is highly toxic for plants and animals is:

    A

    Au

    B

    Mn

    C

    Hg

    D

    Ca

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

    4.

    The white solid that turns black on addition of NH4OH{\rm{N}}{{\rm{H}}_4}{\rm{OH}} is:

    A

    AgCl

    B

    PbCl2{\rm{PbC}}{{\rm{l}}_2}

    C

    Hg2Cl2{\rm{H}}{{\rm{g}}_2}{\rm{C}}{{\rm{l}}_2}

    D

    Hg2I2{\rm{H}}{{\rm{g}}_2}{{\rm{I}}_2}

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:d- and f-Block Elements
    🎯Topic:Characteristic Properties
    🎓 Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Qualitative Analysis, Metal Ion Reactions, Complex Ion Formation, Solubility

    5.

    ‘Mercury’ tree can be prepared:

    A

    By mixing up mercuric thiocyanate and gum

    B

    By adding Nessler’s reagent to a ammonium salt solution

    C

    By pouring little mercury into AgNO3{\rm{AgN}}{{\rm{O}}_3} solution

    D

    By heating mercuric chloride

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:d- and f-Block Elements
    🎯Topic:Characteristic Properties
    🎓 Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Chemical Reactions, Precipitation, Mercury Chemistry

    6.

    Which of the following metals has been used in making boats because it has resistance to corrosion by seawater?

    A

    W

    B

    Cu

    C

    Ni

    D

    Ti

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

    7.

    AuCl3{\rm{AuC}}{{\rm{l}}_3} when heated in air gives:

    A

    Gold oxide

    B

    Gold perchlorate

    C

    Gold nitride

    D

    AuCl

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:d- and f-Block Elements
    🎯Topic:Characteristic Properties
    🎓 Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :decomposition of metal chlorides, thermal stability of compounds, gold chemistry

    8.

    Which of the following lanthanide(III) ions has seven filled f orbitals?

    A

    Gd3+

    B

    Lu3+

    C

    Eu3+

    D

    Yb3+

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:d- and f-Block Elements
    🎯Topic:Characteristic Properties
    PYQ YEAR: 2024
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Lanthanides, Electronic Configuration, Orbitals

    9.

    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

    10.

    Which of the following pairs of elements cannot form an alloy?

    A

    Zn, Cu

    B

    Fe, Hg

    C

    Fe, C

    D

    Hg, Na

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

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