Tag: nitrogen and sulfur

Questions Related to nitrogen and sulfur

Which of the following element occurs in free form in nature?

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

  1. $N$

  2. $P$

  3. $As$

  4. $Sb$

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Correct Option: A
Explanation:

Nitrogen occurs in the free state as $N _2$ as it has less size it has more tendency to from pi bonds with same elements and get stability.
Hence option  A is correct.

$2N 2+O _2 \longrightarrow $ _________ ?

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

  1. $N _2O$

  2. $NO _2$

  3. $NO$

  4. $N _2O _2$

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Correct Option: A
Explanation:

Nitrogen and oxygen react to form nitrous oxide.


$2N _2 + O _2 \rightarrow 2N _2O$

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


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 :

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

  1. $\dfrac { p }{ 3 }$

  2. $\dfrac { p }{ 4 }$

  3. $\dfrac { p }{ 6 }$

  4. $\dfrac { p }{ 8 }$

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Correct Option: A
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 = $p*\dfrac{1}{3}=\dfrac{p}{3}$

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

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

  1. $N _2$

  2. $N _2O$

  3. $O _2$

  4. $Na _2O$

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Correct Option: C
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.

Which compound does nitrogen have oxidation number in fraction?

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

  1. $NH _{2}OH$

  2. $N _{2}H _{4}$

  3. $NH _{3}$

  4. $N _{3}H$

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Correct Option: D

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

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

  1. 2

  2. 3

  3. 4

  4. 5

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Correct Option: B
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

All metals react with nitrogen on heating.
chemistry nitrogen and sulfur nitrogen gas component of air - nitrogen nitrogen

  1. True

  2. False

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Correct Option: B

The mixed anhydride of nitrogen is:

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

  1. ${N} _{2}{O} _{2}(2NO)$

  2. ${N} _{2}{O} _{4}(2{NO} _{2})$

  3. ${N} _{2}{O} _{5}$

  4. ${N} _{2}{O} _{2}$

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Correct Option: A
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.

The mixed anhydride of nitrogen is:

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

  1. $N _2O _2(2NO)$

  2. $N _2O _4(2NO _2)$

  3. $N _2O _5$

  4. $N _2O _3$

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Correct Option: B
Explanation:

$NO _2$ is called as a mixed anhydride of nitrogen because it gives a mixture of $ HNO _2$ and $HNO _3$. Hence option (B) is correct .

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................

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

  1. $Mg _{3}N _{2}$

  2. $MgO$

  3. $Mg _{2}O _{3}$

  4. $MgCl _{2}$

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Correct Option: A
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 $Cr _2O _3$