Download App

p -Block elements - ll — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryp -Block elements - ll1 Mark
MCQ
Which of the following statements is not true
  • A
    The spin magnetic moment of $KO_2$ is $1.73\,BM$
  • B
    The hybridisation of $B$ in $H_3BO_3$ is $sp^2$
  • C
    In $H_2S_2O_8\, S-S$ linkage is present
  • ✓
    In $ClF_3$ axial and Equatorial bonds are not identical
✓

Answer

Correct option: D.
In $ClF_3$ axial and Equatorial bonds are not identical
d
The valence shell electron configuration of ground state of sulphur is $3 \mathrm{s}^{2} 3 \mathrm{p}^{4}$

The valence shell electron configuration of first excited state of sulphur is $3 \mathrm{s}^{2} 3 \mathrm{p}^{3} 3 \mathrm{d}^{1}$

The valence shell electron configuration of second excited state of sulphur is $3 \mathrm{s}^{1} 3 \mathrm{p}^{2} 3 \mathrm{d}^{2}$.

This is followed by sp ${ }^{3} \mathrm{d}^{2}$ hybridization to form $\mathrm{SF}_{6}$.

Thus $\mathrm{SF}_{6}$ is formed in the second excitation state of sulphur atom.

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

Explore more

More "M.C.Q (1 Marks)" from p -Block elements - ll→p -Block elements - ll — all question types→Chemistry STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

Identify an appropriate reagent for the conversion of $1^o$ Alcohol to carboxylic acid:-
→
Stadard electromotive force for following cell is $ Zn|Zn^{+2}\, (1\,M)| |I^{\circleddash}\,(1\,M)| CuI| Cu$ if halfcell reaction ........... $\mathrm{V}$

$CuI_{(s)} + e^{\circleddash} \to Cu_{(s)} + I^{\circleddash}_{(aq)}$ ;  $E^o = -0.17\, V$

$Zn^{+2}_{(aq)} + 2e^{\circleddash} \to  Zn_{(s)}$  ;   $E^o = -0.76\, V$

→
For a first order reaction $A \to $ products, the concentration of $[A]$ is reduced from $2\,M$ to $0.125\  M$ in one hour, the $t_{1/2}$ of this reaction (in $\min$) is
→
Major product which you expect in the above reaction is
→
Complete the following reaction :

$[ C ]$ is $........$

→
What minimum decomposition potential is necessary to produce $Cl_2$ gas in following reaction ................ $\mathrm{V}$ 

Given :( $\frac{{2.303RT}}{F} = 0.06)$

$s{n^{ + 2}}\left( {1M} \right) + 2C{l^ - }\left( {2M} \right) \rightleftharpoons s{n_{\left( s \right)}} + C{l_2}\left( {1\,atm} \right)$

Given : ${E^o}_{s{n^{ + 2}}/sn} =  - 0.14$      ${E^o}_{C{l_2}/C{l^- }} = 1.4\,V$

→
Consider the following standard electrode potentials ($E^o$ in volts) in aqueous solution

Element $M^{3+}/ M$ $M^+/M$
$Al$ $-1.66$ $+0.55$
$Tl$ $+1.26$ $-0.34$

Based on these data, which of the following statements is correct ?

→
Which of the following after reacting with $KI$ do not remove iodine
→
An organic compound undergoes first order decomposition. If the time taken for the $60 \,\%$ decomposition is $540\,s$, then the time required for $90\,\%$ decomposition will be is $..........s$. (Nearest integer). Given : $\ln 10=2.3 ; \log 2=0.3$
→
Glucose and Fructose can be differentiated by
→