Tag: nitrogen and sulfur

Questions Related to nitrogen and sulfur

$NH _3 + O _2 \overset {Pt}{\rightarrow}$$A+H _2O$

Identify the compound A.

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

  1. $NO$

  2. $NO _2$

  3. $NO _3$

  4. $HNO _3$

Show answer
Correct Option: A
Explanation:

Reaction:
$4 NH _3 + 5 O _2 \xrightarrow  {Pt}  4 NO + 6 H _2O$

$NH _3 + H _2O \longrightarrow$ (C) + (D) (both oxy acid)

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

  1. (C) : $HNO _2; \, \, \, \, \, $(D) : $HNO _2$

  2. (C) : $H _2NO _3 ;\, \, \, \, \, $(D) : $HNO _3$

  3. (C) : $HNO _2 ;\, \, \, \, \, $(D) : $HNO _3$

  4. None of these

Show answer
Correct Option: C
Explanation:

Reaction:
$NH _3 + H _2O \rightarrow HNO _2 + HNO _3 $

In liquid $NH _3$ :

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

  1. $NH _4CI$ behaves as acid

  2. $NaNH _2$ behaves as base

  3. $CH _3COOH$ behaves as strong acid

  4. all of the above facts are true

Show answer
Correct Option: D
Explanation:

In liquid $NH _3$,
$NH _4Cl\rightarrow NH _4^++Cl^-$ (acid)
$NaNH _2\rightarrow Na^++NH _2^-$ (base)
$CH _3COOH+NH _3\rightarrow NH _4^++CH _3COO^-$ (acid)

The dissolution of ammonia gas in water does not obey Henry's law. On dissolving, a major portion of ammonia molecules reacts with ${H} _{2}O$ to form ${NH} _{4}OH$ molecules. ${NH} _{4}OH$ again dissociates into ${NH} _{4}^{+}$ and ${OH}^{-}$ ions. In solution therefore, we have ${NH} _{3}$ molecules, ${NH} _{4}OH$ molecules and ${NH} _{4}^{+}$ ions and the following equilibrium exist:

${NH} _{3}(g)$ $ \rightleftharpoons{NH} _{3}(l)+{H} _{2}O{(l)}\rightleftharpoons  {NH} _{4}OH{(aq)}\rightleftharpoons  {NH} _{4}^{+}{(aq)}+{OH}^{-}{(aq)}$

Let, ${c} _{1}$ ${(mol/L)}$ of ${NH} _{3}$ pass in liquid state which on dissolution in water forms ${c} _{2}$ ${(mol/L)}$ of ${NH} _{4}OH$. The solution contains ${c} _{3}$ ${(mol/L)}$ of ${NH} _{4}^{+}$ ions.

Concentration of undissociated ammonium hydroxide is________.
chemistry nitrogen and sulfur ammonia-properties and uses ammonia compounds of nitrogen - ammonia

  1. ${c} _{1}+{c} _{2}$

  2. ${c} _{2}-{c} _{3}$

  3. ${c} _{1}+{c} _{3}$

  4. ${c} _{1}-{c} _{2}$

Show answer
Correct Option: B
Explanation:

${NH} _{3}(g)$$\rightleftharpoons {NH} _{3}(l)+{H} _{2}O\rightleftharpoons  {NH} _{4}OH\rightleftharpoons  {NH} _{4}^{+}+{OH}^{-}$

$c _1$                                                $c _2$                $c _3$
So, remaining moles of undissociated ammonium hydroxide, $NH _4OH=  c _2-c _3$

Aqueous solution of ammonia consists of :

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

  1. $H^+$ only

  2. $H^-$ only

  3. $NH^+ _4$ only

  4. $NH^+ _4$ and $OH^-$

Show answer
Correct Option: D
Explanation:
Aqueous solution of ammonia consists of $NH^+ _4$ and $OH^-$.
$NH _3+H _2O\rightarrow NH^{+} _4+OH^{-}$
Hence, option D is correct.

In the absence of catalyst, ammonia is burnt in an atmosphere of oxygen and produces :

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

  1. nitogen gas and water

  2. nitric oxide

  3. nitrogen dioxide

  4. nitric acid

Show answer
Correct Option: A
Explanation:

The combustion of ammonia proceeds to yield nitogen gas and water. With the use of catalyst and under correct conditions of temperature, ammonia reacts with oxygen to produce nitric oxide which is oxidized to nitrogen dioxide and is used in the synthesis of nitric acid.

Ammonia is highly soluble in water. Other gases showing similar solubility is/are :

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

  1. hydrochloric gas

  2. sulphur dioxide gas

  3. chlorine

  4. both A and B

Show answer
Correct Option: D
Explanation:

Ammonia is highly soluble In water. Two other gases showing similar solubility are hydrochloric gas and sulphur dioxide gas.

Fertilizer obtained from ammonia is/are :

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

  1. urea

  2. ammonium sulfate

  3. urea ammonium nitrate

  4. all of the above

Show answer
Correct Option: D
Explanation:

Anhydrous ammonia is the source of nitrogen for other commercial fertilizers, e.g., urea, ammonium sulfate, urea ammonium nitrate etc.

Ammonia on reaction with hypochlorite anion can form:

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

  1. $NO$

  2. $NH _4Cl$

  3. $N _2H _2$

  4. $HNO _2$

Show answer
Correct Option: B,C
Explanation:

$NH _3+HOCl \rightarrow NH _4Cl + H _2O$

$2NH _3 + OCl^- \rightarrow N _2H _4 + Cl^- + H _2O$

A bottle of liquor ammonia should be cooled before opening.

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

  1. True

  2. false

  3. sometimes true sometimes false

  4. none

Show answer
Correct Option: A
Explanation:

It should be cooled to lower the pressure of ${NH} _{3}$ inside the bottle, otherwise ${NH} _{3}$ will bump out of the bottle.