Tag: nitrogen and sulfur

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Questions Related to nitrogen and sulfur

Multiple choice chemistry nitrogen and sulfur nitrogen gas component of air - nitrogen nitrogen

${ N } _{ 2 }(g)\ +\ { 3H } _{ 2 }(g)\rightleftharpoons { 2NH } _{ 3 }(g)$


For the reaction initially the mole was 1 : 3 of $N _2$ and ${ H } _{ 2 }$. At equilibrium 50% of each has reacted. If the equilibrium pressure is p, the partial pressure of ${ NH } _{ 3 }$ at equilibrium is :

  1. $\dfrac { p }{ 3 }$
  2. $\dfrac { p }{ 4 }$
  3. $\dfrac { p }{ 6 }$
  4. $\dfrac { p }{ 8 }$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
$N _2 + 3H _2⇌2NH _3$
  1           3             0
(1-$x$)  ($3-3x$)     $2x$
            
$1-x =  \dfrac{1}{2}$
$\therefore x=\dfrac{1}{2}$
Mole of $H _2 = $ 1.5 mol
Mole of $N _2 = $ 0.5 mol
Mole of $NH _3 = $ 1.0 mol
Now,
Mole fraction of $NH _3$ =$\dfrac{1}{3}$

partial pressure = $p*\dfrac{1}{3}=\dfrac{p}{3}$
Multiple choice chemistry nitrogen and sulfur nitrogen gas component of air - nitrogen nitrogen

Gas B is paramagnetic and support the combustion compound B is :

  1. $N _2$
  2. $N _2O$
  3. $O _2$
  4. $Na _2O$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

$O _2$ is paramagnetic due to the presence of $2$ unpaired $e^-$ in the $\Pi$-antibonding orbital.

$\sigma1s^2\sigma^*1s^2\sigma2s^2\sigma^*2s^2\sigma2p _3^2\Pi2p _x^2=\Pi2p _y^2\Pi^*2p _x^1=\Pi^*2p _y^1$
Also, $O _2$ supports combustion as it does not burn but it is an oxidizer, it oxidizes other reactive materials, itself getting reduced.

Multiple choice chemistry nitrogen and sulfur nitrogen gas component of air - nitrogen nitrogen

Which compound does nitrogen have oxidation number in fraction?

  1. $NH _{2}OH$
  2. $N _{2}H _{4}$
  3. $NH _{3}$
  4. $N _{3}H$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In hydrazoic acid (N3H), the total oxidation state of the three nitrogen atoms must be -1 to balance the +1 of hydrogen. Thus, the average oxidation state of nitrogen is -1/3, which is a fraction.

Multiple choice chemistry nitrogen and sulfur nitrogen gas component of air - nitrogen nitrogen

How many of the following compound on thermal decomposition gives $N _2$ gas?
$(NH _4) _2 Cr _2 O _7$, $NH _4 NO _3$, $NH _4 IO _3$, $NH _4 NO _2$, $Ba(N _3) _2$, $Ba(NO _3) _2$, $(NH _4) _2 SO _4$, $(NH _4) _2 CO _3$

  1. 2

  2. 3

  3. 4

  4. 5
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

$(NH _4) _2Cr _2O _7\longrightarrow N _2+Cr _2O _3+H _2O$

$NH _4NO _3\longrightarrow N _2O+2H _2O$
$NH _4IO _3\longrightarrow$
$NH _4NO _2\longrightarrow N _2+2H _2O$
$Ba(N _3) _2\longrightarrow Ba+3N _2$
$Ba(NO _3) _2\longrightarrow BaO+NO _2+O _2$
$(NH _4) _2SO _4\longrightarrow NH _4HSO _4+NH _3$
$(NH _4) _2CO _3\longrightarrow 2NH _3+CO _2+H _2O$
$\therefore$ Answer is option B=3

Multiple choice chemistry nitrogen and sulfur nitrogen gas component of air - nitrogen nitrogen

The mixed anhydride of nitrogen is:

  1. ${N} _{2}{O} _{2}(2NO)$
  2. ${N} _{2}{O} _{4}(2{NO} _{2})$
  3. ${N} _{2}{O} _{5}$
  4. ${N} _{2}{O} _{2}$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Mixed anhydride or double acid anhydride is the compound that reacts with water to form a mixture of two acidic anhydride.
Two oxides of nitrogen are acid anhydrides; that is, they react with water to form two nitrogen-containing oxyacids.

$2NO _2 + H _2O \longrightarrow HNO _3 + HNO _2$
 
Hence, the correct option is B.
Multiple choice chemistry nitrogen and sulfur nitrogen gas component of air - nitrogen nitrogen

An orange solid (X) on heating, gives a colourless gas (Y) and a only green residue (Z). Gas (Y) on treatment with Mg, produceds a white solid substance................

  1. $Mg _{3}N _{2}$
  2. $MgO$
  3. $Mg _{2}O _{3}$
  4. $MgCl _{2}$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

$(NH _4) _2Cr _2O _7  \rightarrow N _2 + Cr _2O _3 + 4H _2O$
$3Mg + N _2 \rightarrow Mg _3N _2$
Orange solid is $(NH _4) _2Cr _2O _7$
Colourless gas is $N _2$
Green residue is $Cr _2O _3$