Download App

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

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryp -Block elements - ll1 Mark
MCQ
On heating ammonium dichromate and bariumazide separately we get 
  • ✓
    $N_2$ in both cases
  • B
    $N_2$ with ammonium dichromate and $NO$ with barium azide
  • C
    $N_2O$ with ammonium dichromate and $N_2$ with barium azide
  • D
    $N_2O$ with ammonium dichromate and $NO_2$ with barium azide
✓

Answer

Correct option: A.
$N_2$ in both cases
a
$\left(\mathrm{NH}_{4}\right)_{2} \mathrm{Cr}_{2} \mathrm{O}_{7} \stackrel{\Delta}{\longrightarrow} \mathrm{N}_{2}+\mathrm{Cr}_{2} \mathrm{O}_{3}+4 \mathrm{H}_{2} \mathrm{O}$

$\mathrm{Ba}\left(\mathrm{N}_{3}\right)_{2} \rightarrow 3 \mathrm{N}_{2}+\mathrm{Ba}$

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

Which of the following halides is most acidic
→
The standard reduction potentials at $298 \mathrm{~K}$ for the following half cells are given below :

$\mathrm{Cr}_2 \mathrm{O}_7{ }^{2-}+14 \mathrm{H}^{+}+6 \mathrm{e}^{-} \rightarrow 2 \mathrm{Cr}^{3+}+7 \mathrm{H}_2 \mathrm{O}, \mathrm{E}^{\circ}=1.33 \mathrm{~V}$

$\mathrm{Fe}^{3+}(\mathrm{aq})+3 \mathrm{e}^{-} \rightarrow \mathrm{Fe}  \mathrm{E}^{\circ}=-0.04 \mathrm{~V}$

$\mathrm{Ni}^{2+}(\mathrm{aq})+2 \mathrm{e}^{-} \rightarrow \mathrm{Ni}  \mathrm{E}^{\circ}=-0.25 \mathrm{~V}$

$\mathrm{Ag}^{+}(\mathrm{aq})+\mathrm{e}^{-} \rightarrow \mathrm{Ag} \mathrm{E}^{\circ}=0.80 \mathrm{~V}$

$\mathrm{Au}^{3+}(\mathrm{aq})+3 \mathrm{e}^{-} \rightarrow \mathrm{Au} \mathrm{E}^{\circ}=1.40 \mathrm{~V}$

Consider the given electrochemical reactions, The number of metal$(s)$ which will be oxidized be $\mathrm{Cr}_2 \mathrm{O}_7{ }^{2-}$, in aqueous solution is. . . . . . 

→
Which of the following ions has electronic configuration $[Ar]3d^6$ ?

(At. nos. $Mn = 25, Fe = 26, Co = 27, Ni = 28$)

→
For a first order reaction, $A\to  P$, $t_{1/2}$ (half-life) is$10\,days$. The time required for $\frac{{{1^{th}}}}{4}$ conversion of $A$ (in days) is: $(\ln\, 2\, = 0.693,\, \ln\, 3\, = 1.1)$.
→
An optically active compound $'X'$ having molecular formula $C_4H_8O_3$ it evolves $CO_2$ with $NaHCO_3$.$'x'$ on treatment with $LiAlH_4$ gives achiral compound then $'x'$ is
→
Which one belongs to $3d-$ transition series
→
Atomic number of three elements A, B, and C are respectively,
Pm (Z = 61), Sm (Z = 62), Eu (Z = 63).
Which one has a maximum atomic radius?
→
Correct reactivity order of $S_N2$ reaction is
→
The standard electrode potential for the following reaction is $+1.33\,V.$  What is the potential at $pH = 2.0$ ............ $\mathrm{V}$

$Cr_2O_7^{2-}$ ( $aq$  $1\,M$ ) $+ 14H^+(aq) + 6e^-$ $\rightarrow 2Cr^{+3} (aq,\,1\,M) + 7H_2O (l)$

→
In the given reaction sequence :

$CH_3-CH_2-OH$ $\mathop {\xrightarrow{{(i)\,KMn{O_4}/\mathop O\limits^\Theta  H/\Delta }}}\limits_{(ii)\,{H^ \oplus }} (A)\mathop {\xrightarrow{{(i)\,SOC{l_2}}}}\limits_{(ii)\,N{H_3}/\Delta } (B)$ $\xrightarrow{{B{r_2}/KOH}}(C)$

$(C)$ will be :

→