MCQ
Which of following statement is incorrect :
  • A
    Lithium and magnesium exhibit diagonal relationship
  • B
    Elements of groups $1, 2, 13, 14, 15, 16$ and $17$ are known as representative elements
  • C
    In $5^{th}$ period, the subshells $5s,\, 4f,\, 4d,\, 5p$ would be filled
  • General configuration of f-Block elements is $(n -2)f^{1-14}\, (n -1)d^{0-1} \,ns^2$

Answer

Correct option: D.
General configuration of f-Block elements is $(n -2)f^{1-14}\, (n -1)d^{0-1} \,ns^2$
d

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Strength of hydrogen bond is intermediate between
Phenol is less acidic than
The conductance of a $0.0015 \mathrm{M}$ aqueous solution of a weak monobasic acid was determined by using a conductivity cell consisting of platinized $\mathrm{Pt}$ electrodes. The distance between the electrodes is $120 \mathrm{~cm}$ with an area of cross section of $1 \mathrm{~cm}^2$. The conductance of this solution was found to be $5 \times 10^{-7} \mathrm{~S}$. The $\mathrm{pH}$ of the solution is $4$ . The value of limiting molar conductivity $\left(\Lambda_{\mathrm{m}}^0\right)$ of this weak monobasic acid in aqueous solution is $\mathrm{Z} \times 10^2 \mathrm{~S} \mathrm{~cm}^{-1} \mathrm{~mol}^{-1}$. The value of $\mathrm{Z}$ is
If the equilibrium constant of the reaction $2HI$ $\rightleftharpoons$ ${H_2} + {I_2}$ is $0.25$, then the equilibrium constant of the reaction ${H_2} + {I_2}$ $\rightleftharpoons$ $2HI$ would be
Match the compounds in $LIST-I$ with the observation in $LIST-II$, and choose the correct option.

$LIST-I$ $LIST-II$
$(I)$ Aniline $(P)$ Sodium fusion extract of the compound on boiling with $FeSO _4$, followed by acidification with conc. $H _2 SO _4$, gives Prussian blue color.
$(II)$ o-Cresol $(Q)$ Sodium fusion extract of the compound on treatment with sodium nitroprusside gives blood red color.
$(III)$ Cysteine $(R)$ Addition of the compound to a saturated solution of $NaHCO _3$ results in effervescence.
$(IV)$ Coprolactam $(S)$ The compound reacts with bromine water to give a white precipitate.
  $(T)$ Treating the compound with neutral $FeCl _3$ solution produces violet color.

 

Major product of the reaction is
Arrange leaving power of $Nu^r$ group in decreasing order

$(I)$ $\begin{array}{*{20}{c}}
  {O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {O - S - {C_6}{H_4} - C{H_3}} \\ 
  {||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} 
\end{array}\,$   $(II)$ $\begin{array}{*{20}{c}}  {O\,\,\,\,\,\,\,} \\   {||\,\,\,\,\,\,\,} \\   {O - S - {C_6}{H_5}} \\   {||\,\,\,\,\,\,\,} \\   {O\,\,\,\,\,\,\,} \end{array}\,$$(III)$ $N_3$ $(IV)$ $Br$

Which of the following is not characteristic of alcohols
In electrolysis of aqueous $NaOH$ at $NTP$ $2.8\, L$ of oxygen gas is liberated at anode, amount of gas liberated at cathode will be ............ $\mathrm{L}$
$pH$ of a mixture which is $0.1$ $M$ in $CH_3COOH$ and $0.05$ $M$ in $(CH_3COO)_2Ba$ is [$pK_a$  of  $CH_3COOH$ = $4.74$]