Tag: nitrogen and sulfur

Questions Related to nitrogen and sulfur

The mixture of $CO$ and $N _2$ is called as :

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

  1. Water gas

  2. Producer gas

  3. Synthetic gas

  4. Marsh gas

Show answer
Correct Option: B
Explanation:

Water gas is a synthesis gas, containing carbon monoxide and hydrogen. It is a useful product but requires careful handling due to its flammability and the risk of carbon monoxide poisoning. 
Producer gas: a gas composed of carbon monoxide, hydrogen, and nitrogen, obtained by passing air and steam through incandescent coke.
Syngas/synthesis gas, is a fuel gas mixture consisting primarily of hydrogen, carbon monoxide, and very often some carbon dioxide.
Marsh gas is methane $CH _4$.

Nitrogen molecule is chemically less active because of its :

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

  1. small atomic energy.

  2. high dissociation energy.

  3. high electronegativity.

  4. stable electronic configuration.

Show answer
Correct Option: B
Explanation:
Nitrogen molecule is chemically less active because of its high dissociation energy. Nitrogen molecule contains triple bond between two atoms which is very strong and requires high energy for splitting the two nitrogen atoms of a molecule. 


Ammonia is used in detection of $Cu^{2+}$ ion because:

chemistry nitrogen and sulfur ammonia-properties and uses ammonia compounds of nitrogen - ammonia

  1. aqueous solution of $NH _{3}$ reacts with $Cu^{2+}$ ion to form deep blue coloured complex

  2. $NH _{3}$ reacts with $Cu^{2+}$ ion to give blue precipitate of $CuO$

  3. aqueous solution of $NH _{3}$ reacts with $Cu^{2+}$ ion to form white coloured complex.

  4. $NH _{3}$ reacts with $Cu^{2+}$ ion to give green precipitate.

Show answer
Correct Option: A
Explanation:

Ammonia acts as a Lewis base due to the presence of lone pair of  on the nitrogen atom.so,it can form coordinate bond transition metal cations to from complex compounds.Ammonia reacts with a solution of $Cu^{2+}$  to from a deep blue coloured complex.The reaction for the above complex  compound can be written as follows:

$Cu^{2+}(aq) + 4 NH _3(aq)\rightarrow [Cu(NH _3) _4]^{2+}(aq)$

                                                                              Deep Blue

Hence option A is correct.

Ammonia is a Lewis base. It forms complexes with cations. Which one of the following cations does not form complex with ammonia?

chemistry nitrogen and sulfur ammonia-properties and uses ammonia compounds of nitrogen - ammonia

  1. Ag$^{+}$

  2. Cu$^{2+}$

  3. Cd$^{2+}$

  4. Pb$^{2+}$

Show answer
Correct Option: D
Explanation:
Ammonia is a Lewis base. It forms complexes with cations of transition elements. $Pb^{2+}$ does not form a complex with ammonia as lead ($Pb$) is not a transition element. Lead ($Pb$) is a p - block element.

Hence option D is correct.

$-{ NH } _{ 2 }$ group shows acidic nature while reacts with this reagent:

chemistry nitrogen and sulfur ammonia-properties and uses ammonia compounds of nitrogen - ammonia

  1. $Na$

  2. ${ CS } _{ 2 }$

  3. ${ Br } _{ 2 }+NaOH$

  4. water

Show answer
Correct Option: A
Explanation:

A compound shows acidic nature if the opposite atom or compound of the bond shows basic character. Sodium is a metal and it is basic in nature. $-NH _2$ shows acidic character when it reacts with sodium.

 Liquor ammonia bottles are opened only after cooling. This is because:

chemistry nitrogen and sulfur ammonia-properties and uses ammonia compounds of nitrogen - ammonia

  1. It is a mild explosive

  2. It is a corrosive liquid

  3. It is a lachrymatory

  4. none of these

Show answer
Correct Option: A
Explanation:

Liquor ammonia has a mild explosive property, so, the bottle are opened only after cooling

Hydroxide of which compound is insoluble in aquous ammonia solution?

chemistry nitrogen and sulfur ammonia-properties and uses ammonia compounds of nitrogen - ammonia

  1. ${ FeCl } _{ 3 }$

  2. ${ CuSO } _{ 4 }$

  3. AgCl

  4. ${ ZnSO } _{ 4 }$

Show answer
Correct Option: A
Explanation:

Solution:- (A) $Fe{Cl} _{3}$

${Ag}^{+}, {Cu}^{+2}$ and ${Zn}^{+2}$ forms soluble complexes with ammonia.

Acidic nature of amino group is shown by the reaction :-

chemistry nitrogen and sulfur ammonia-properties and uses ammonia compounds of nitrogen - ammonia

  1. $R{ - }{ N }{ H } _{ 2\quad }+NOCL\longrightarrow RCI+{ N } _{ 2 }+{ H } _{ 2 }O$

  2. $2RN{ H } _{ 2 }+2Na\longrightarrow 2RNH.Na+{ N } _{ 2 }$

  3. $R.C{ H } _{ 2 }N{ H } _{ 2 }+HN{ O } _{ 2 }+{ N } _{ 2 }+{ H } _{ 2 }{ O }$

  4. $R.N{ H } _{ 2 }+HCL\longrightarrow RN{ H } _{ 3 }CL$

Show answer
Correct Option: B

The enthalpy of formation of ammonia is $-46.0KJ{mol}^{-1}$. The enthalpy change for the reaction 
$2{NH} _{3}(g)\rightarrow {N} _{2}(g)+3{H} _{2}(g)$

chemistry nitrogen and sulfur ammonia-properties and uses ammonia compounds of nitrogen - ammonia

  1. $46.0KJ{mol}^{-1}$

  2. $92.0KJ{mol}^{-1}$

  3. $-23.0KJ{mol}^{-1}$

  4. $-92.0KJ{mol}^{-1}$

Show answer
Correct Option: D

Which one does not liberate NH3 when undergoes hydrolysis?

chemistry nitrogen and sulfur ammonia-properties and uses ammonia compounds of nitrogen - ammonia

  1. Acetaniide

  2. Acetonitrile

  3. Acetamide

  4. Phenyl isocyanide

Show answer
Correct Option: D