The Dblock And Fblock Elements Test

The Dblock And Fblock Elements

This is the dblock and fblock elements Test-04 for CBSE class 12 Chemistry.. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Ferrous sulphate on heating gives
  • A
    $SO_2$ and $SO_3$
    Correct
  • B
    $SO_2$
  • C
    $SO_3$
  • D
    $SO_2$ and $O_2$
2
In the reaction, A is
Question 2 figure 1
  • A
    Hg
    Correct
  • B
    $HgCl_3$
  • C
    $HgCl_2$
  • D
    HgCl
3
$Ag^+$ ion is isoelectronic with
  • A
    $Cd^{2+}$
    Correct
  • B
    $Zn^{2+}$
  • C
    $Pd^{2+}$
  • D
    $Cu^+$
4
$Ni^{2+}$ in traces can be tested using
  • A
    Potassium ferrocyanide
  • B
    Ammonium sulphocyanide
  • C
    Sodium nitroprusside
  • D
    Dimethyl glyoxime
    Correct
5
The compound which is widely used as a white pigment is
  • A
    $Al_2O_3$
  • B
    $CaCO^3$
  • C
    $PbCO^3$
  • D
    ZnO
    Correct
6
The catalyst used in Deacon’s process is
  • A
    $FeCl_3$
  • B
    $FeCl_2$
  • C
    $Cu_2Cl_2$
  • D
    $CuCl_2$
    Correct
7
Identify the photosensitive silver halides.
  • A
    AgF, AgI
  • B
    AgI, AgBr, AgCl, AgF
  • C
    AgI, AgBr, AgCl
    Correct
  • D
    AgBr, AgCl
8
Annealing process involves
  • A
    Heating the rods of iron in ammonia
  • B
    Heating the steel bright red and then cooling suddenly
  • C
    Heating the rods of iron embedded in charcoal
  • D
    Heating the steel bright red and then cooling slowly
    Correct
9
How many electrons are involved in reduction of KMnO4 in basic medium?
  • A
    3
    Correct
  • B
    2
  • C
    3
  • D
    1
10
Calomel is the name of
  • A
    $HgC{l_2} + {\text{ }}Hg$
  • B
    $H{g_2}C{l_2} + {\text{ }}Hg$
  • C
    $H{g_2}C{l_2}$
    Correct
  • D
    $HgC{l_2}$
11
Silver ornaments turn black by atmospheric
  • A
    $C{l_2}$
  • B
    ${N_2}$
  • C
    ${H_2}S$
    Correct
  • D
    ${O_2}$
12
In the reaction ${\text{HgC}}{{\text{l}}_{\text{2}}} + {\text{ KI}}\;\xrightarrow{{}}{\text{A }} + {\text{ HCl}}$.A is
  • A
    $Hg{I_2}$
  • B
    $KHg{I_3}$
  • C
    ${K_2}Hg{I_3}$
  • D
    ${K_2}Hg{I_4}$
    Correct
13
Electronic configuration of $Fe^{3+}$ is
  • A
    $\left[ {Ar} \right]3{d^5}$
    Correct
  • B
    $\left[ {Ar} \right]4{s^2}3{d^3}$
  • C
    $\left[ {Ar} \right]4{s^2}3{d^4}$
  • D
    $\left[ {Ar} \right]4{s^2}3{d^6}$
14
The yellow colour of the chromate changes to orange on acidification due to the formation of
  • A
    $C{r_2}{O_3}$
  • B
    $C{r_2}{O_7}^{2{\text{ }}--}$
    Correct
  • C
    $Cr{O_4}^{2{\text{ }}--}$
  • D
    $Cr{O_2}$
15
Identify Prussian blue from the following ?
  • A
    $F{e_2}\left[ {Fe{{\left( {CN} \right)}_6}} \right]$
  • B
    $\begin{array}{*{20}{l}} {F{e_4}{{\left[ {Fe{{\left( {CN} \right)}_6}} \right]}_3}} \end{array}$
    Correct
  • C
    $Fe\left[ {Fe{{\left( {CN} \right)}_6}} \right]$
  • D
    $F{e_3}{\left[ {Fe{{\left( {CN} \right)}_6}} \right]_2}$