The Dblock And Fblock Elements Test

The Dblock And Fblock Elements

This is the dblock and fblock elements Test-01 for CBSE class 12 Chemistry.. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Which of the following sublimes on heating?
  • A
    $Hg_2Cl_2$
  • B
    $ZnCl_2$
  • C
    $CdCl_2$
  • D
    $HgCl_2$
    Correct
2
Which one of the following compound is deliquescent?
  • A
    $HgCl_2$
  • B
    $ZnCl_2$
    Correct
  • C
    $Hg_2Cl_2$
  • D
    $CdCl_2$
3
Which of the following ion has smallest radii?
  • A
    $M{n^{2 + }}$
  • B
    $N{i^{2 + }}$
    Correct
  • C
    $T{i^{2 + }}$
  • D
    ${V^{2 + }}$
4
Which of the following pairs of ions have same paramagnetic moment?
  • A
    $C{u^{2 + }},{\text{ }}T{i^{3 + }}$
    Correct
  • B
    $T{i^{3 + }},{\text{ }}N{i^{2 + }}$
  • C
    $M{n^{2 + }},{\text{ }}C{u^{2 + }}$
  • D
    $T{i^{4 + }},{\text{ }}C{u^{2 + }}$
5
Which of the following metals have only one oxidation state?
  • A
    Al
    Correct
  • B
    Fe
  • C
    Co
  • D
    Sc
6
Mohr’s salt is a
  • A
    Normal salt
  • B
    Double salt
    Correct
  • C
    Basic saltAcidic salt
  • D
    Acidic salt
7
Which one of the following is an example of non – typical transition elements?
  • A
    Ba, Ga, Sr
  • B
    Li, Na, K
  • C
    Be, Al Pb
  • D
    Zn, Cd, Hg
    Correct
8
Zr and Hf have almost equal atomic and ionic radii because
  • A
    Of diagonal relationship
  • B
    Both belong to same transition series
  • C
    Of lanthanoid contraction
    Correct
  • D
    Of actinoid contraction
9
What is the shape of $Fe(CO)_5$ molecule?
  • A
    Square pyramidal
  • B
    Tetrahedral
  • C
    Octahedral
  • D
    Trigonal bipyramidal
    Correct
10
Which of the following compound is amphoteric?
  • A
    $Fe(OH)_3$
  • B
    $Fe(OH)_2$
  • C
    $Cr(OH)_2$
  • D
    $Cr(OH)_3$
    Correct
11
Which of the following sulphides is soluble in aqua regia?
  • A
    HgS
    Correct
  • B
    CdS
  • C
    HgS , ZnS
  • D
    ZnS
12
Silver is refined by cupellation process. The process removes the impurity of
  • A
    Pb
    Correct
  • B
    Cu
  • C
    Pt
  • D
    Au
13
Mohr’s salt is a better volumetric agent then ferrous sulphate because
  • A
    It does not effloresce like ferrous sulphate
  • B
    It is less readily oxidised in the solid state
    Correct
  • C
    Its reaction are less violent
  • D
    All the chemical reactions given by ferrous sulphate are given by Mohr’s salt
14
Red hot steel rods on suddenly immersing in water become
  • A
    Fibrous
  • B
    Tough and ductile
  • C
    Hard and brittle
    Correct
  • D
    Soft and malleable
15
Which of the following methods is based on distribution law?
  • A
    Mond’s process
  • B
    Parke’s process
    Correct
  • C
    Poling process
  • D
    Cupellation process