MCQ
Compound which on heating produces paramagnetic acidic gas?
- ✓$Mg(NO_3)_2$
- B$Fe_2(SO_4)_3$
- C$FeCO_3$
- D$HgC_2O_4$
✓
Answer
Correct option: A.
$Mg(NO_3)_2$
a
$(a)\,\,Mg{(N{O_3})_2}\xrightarrow{\Delta }MgO + \mathop {N{O_2} \uparrow }\limits_{(Paramagnetic)} + {O_2} \uparrow $
$(a)\,\,Mg{(N{O_3})_2}\xrightarrow{\Delta }MgO + \mathop {N{O_2} \uparrow }\limits_{(Paramagnetic)} + {O_2} \uparrow $
$(b)\,\,F{e_2}{(S{O_4})_3}\xrightarrow{\Delta }F{e_2}{O_3} + S{O_3} \uparrow $
$(c)\,FeC{O_3}\xrightarrow{\Delta }FeO + C{O_2} \uparrow $
$(d)\,\,Hg{C_2}{O_4}\xrightarrow{\Delta }Hg + CO \uparrow + C{O_2} \uparrow + \frac{1}{2}{O_2} \uparrow $
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
$(i)$ chlorobenzene is mono-nitrated to $M$
$(ii)$ nitrobenezene is mono-chlorinated to $N$
$(iii)$ anisole is mono-nitrated to $P$
$(iv)\, 2-$ nitrochlorobenzene is mono-nitrated to $Q.$
Out of $M, N, P$ and $Q$ the compound that undergoes reaction with $aq. NaOH$ fastest is
→$(ii)$ nitrobenezene is mono-chlorinated to $N$
$(iii)$ anisole is mono-nitrated to $P$
$(iv)\, 2-$ nitrochlorobenzene is mono-nitrated to $Q.$
Out of $M, N, P$ and $Q$ the compound that undergoes reaction with $aq. NaOH$ fastest is
Ferrous sulphate heptahydrate is used to fortify foods with iron. The amount (in $grams$) of the salt required to achieve $10 \;ppm$ of iron in $100 \;\mathrm{kg}$ of wheat is
→Atomic weight : $Fe =55.85 ; \mathrm{S}=32.0$ $\mathrm{O}=16.00$
The reaction of an aeromatic halogen compound with an alkyl halides in presence of sodium and ether is called
Redox reactions play a pivotal role in chemistry and biology. The values of standard redox potential ( $\mathrm{E}^{\circ}$ ) of two half-cell reactions decide which way the reaction is expected to proceed. A simple example is a Daniel cell in which zinc goes into solution and copper gets deposited. Given below are a set of half-cell reactions (acidic medium) along with their $E^{\circ}$ ($V$ with respect to normal hydrogen electrode) values.
→$\mathrm{I}_2+2 \mathrm{e}^{-} \rightarrow 2 \mathrm{I}\ \ \ \mathrm{E}^{\circ}=0.54 $
$\mathrm{Cl}_2+2 \mathrm{e}^{-} \rightarrow 2 \mathrm{Cl}^{-} \ \ \ \mathrm{E}^{\circ}=1.36 $
$\mathrm{Mn}^{3+}+\mathrm{e}^{-} \rightarrow \mathrm{Mn}^{2+} \ \ \ \mathrm{E}^{\circ}=1.50 $
$\mathrm{Fe}^{3+}+\mathrm{e}^{-} \rightarrow \mathrm{Fe}^{2+} \ \ \ \mathrm{E}^{\circ}=0.77 $
$\mathrm{O}_2+4 \mathrm{H}^{+}+4 \mathrm{e}^{-} \rightarrow 2 \mathrm{H}_2 \mathrm{O} \ \ \ \mathrm{E}^{\circ}=1.23$
$1.$ Among the following, identify the correct statement.
$(A)$ Chloride ion is oxidized by $\mathrm{O}_2$
$(B)$ $\mathrm{Fe}^{2+}$ is oxidized by iodine
$(C)$ Iodide ion is oxidized by chlorine
$(D)$ $\mathrm{Mn}^{2+}$ is oxidized by chlorine
$2.$ While $\mathrm{Fe}^{3+}$ is stable, $\mathrm{Mn}^{3+}$ is not stable in acid solution because
$(A)$ $\mathrm{O}_2$ oxidises $\mathrm{Mn}^{2+}$ to $\mathrm{Mn}^{3+}$
$(B)$ $\mathrm{O}_2$ oxidises both $\mathrm{Mn}^{2+}$ and $\mathrm{Fe}^{2+}$ to $\mathrm{Fe}^{3+}$
$(C)$ $\mathrm{Fe}^{3+}$ oxidizes $\mathrm{H}_2 \mathrm{O}$ to $\mathrm{O}_2$
$(D)$ $\mathrm{Mn}^{3+}$ oxidises $\mathrm{H}_2 \mathrm{O}$ to $\mathrm{O}_2$
$3.$ Sodium fusion extract, obtained from aniline, on treatment with iron $(II)$ sulphate and $\mathrm{H}_2 \mathrm{SO}_4$ in presence of air gives a Prussian blue precipitate. The blue colour is due to the formation of
$(A)$ $\mathrm{Fe}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]_3$ $(B)$ $\mathrm{Fe}_3\left[\mathrm{Fe}(\mathrm{CN})_6\right]_2$
$(C)$ $\mathrm{Fe}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]_2$ $(D)$ $\mathrm{Fe}_3\left[\mathrm{Fe}(\mathrm{CN})_6\right]_3$
Give the answer question $1,2$ and $3.$
The value of freczing point of an aquecus solution is $0.186^{\circ} C$, the corresponding solution's boiling point is $\left( K _{ f }=1.86^{\circ} C mol ^{-1} kg\right)\left( K _{ b }=0.512^{\circ} C \right.$ $\left.mol ^{-1} kg\right):$
→Consider the following Galvanic cell (Image) By what value the cell voltage change when concentration of ions in anodic and cathodic compartments both increased by factor of $10$ at $298\, K.$
→Most acidic among given compound is
Given that $\Delta {T_f}$ is the depression in freezing point of the solvent in a solution of a non-volatile solute of molality $m$, the quantity $\mathop {\lim }\limits_{m \to 0} \left( {\frac{{\Delta {T_f}}}{m}} \right)$ is equal to
→Consider the reaction
→$KOH + {O_3} \to coloured\,solid\,(a) + Gas\,(b) + {H_2}O$
Select $CORRECT$ statement
Which of the following is the fastest reaction