Tag: nitrogen and sulfur

Questions Related to nitrogen and sulfur

Which of the following metal on burining in mosist air does not give smell of ammonia?

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

  1. $Mg$

  2. $Ca$

  3. $K$

  4. $Li$

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Correct Option: C

The formula of Ammonium Sulphate is:

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

  1. $N{H} _{4}S{O} _{4}$

  2. ${(N{H} _{4})} _{2}S{O} _{4}$

  3. $N{H} _{4}{(S{O} _{4})} _{2}$

  4. $N{H} _{2}{(S{O} _{4})} _{2}$

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Correct Option: B
Explanation:

Ammonium sulfate is made by treating ammonia, often as a by-product from coke oven, with sulfuric acid: 

$2 NH _3$ + $H _2SO _4 \rightarrow$   $(NH _4) _2SO _4$
Option "B" is correct.

In Haber's process for the manufacture of ammonia, the catalyst used is :

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

  1. finely divided nickel

  2. finely divided molybdenum

  3. finely divided iron

  4. finely divided platinum

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Correct Option: C
Explanation:

Finely divided iron is used as catalyst in the manufacture of ammonia by Haber's process

Which of the following can be decomposed chemically?

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

  1. Ammonia

  2. Iron

  3. Calcium

  4. Sulphur

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Correct Option: A
Explanation:

Ammonia $NH _3$ is a compound which can be decomposed chemically in its elements nitrogen and hydrogen but iron, calcium and sulphur are elements that can not be decomposed further.

Ammonia gas dissolves in water to give $NH _{4}OH$. In this reaction. water acts as :-

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

  1. $An \ acid$

  2. $A \ base$

  3. $A \ salt$

  4. $A \ conjugate \ base$

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Correct Option: A
Explanation:

$NH _3$+$H _2O$ $\rightarrow$$NH _4^+$ +$OH^-$
Water acts as a proton donor in this reaction. Since, a proton donor is an acid, water acts a Bronsted-Lowry acid.

Nitrogen can be prepared by the action of ammonia on :
chemistry nitrogen and sulfur ammonia-properties and uses ammonia compounds of nitrogen - ammonia

  1. Oxygen

  2. Chlorine

  3. Phosphorus

  4. Sulphur

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Correct Option: B
Explanation:

The action of ammonia on chlorine gas gives nitrogen.

$8NH _3 + 3Cl _2 \rightarrow 6NH _4Cl + N _2$

Hence, option (B) is the correct answer.

Chlorine reacts with excess of ammonia to form :

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

  1. hydrochloric acid and hypochlorous acid

  2. nitrogen dioxide and nitric oxide

  3. hydrogen and oxygen

  4. ammonium chloride and nitrogen

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Correct Option: D
Explanation:

Chlorine reacts with excess of ammonia to form ammonium chloride and nitrogen. 
$8NH _3+3Cl _2\rightarrow 6NH _4Cl+N _2$

Which of the following gives nitrogen on thermal decomposition?

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

  1. Ammonium nitrite

  2. Ammonia

  3. Ammonium dichromate

  4. Air

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Correct Option: A,B,C
Explanation:

Nitrogen gas is obtained by thermal decomposition of ammonium nitrite, ammonia and ammonium dichromate.

Ammonium dichromate on heating yields nitrogen, water and chromium(III) oxide and ammonium nitrate on heating yields nitrogen gas and water.

Which of the following is soluble in ammonia ?

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

  1. $Cr(OH) _{3}$

  2. $Cu(OH) _{2}$

  3. $Fe(OH) _{3}$

  4. $Al(OH) _{3}$

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Correct Option: B
Explanation:

$Cu(OH) _2$ is soluble in $NH _3$. It forms a complex.

$Cu^{2+} + 4NH _3 \longleftrightarrow Cu(NH _3) _4^{2+}$

Nitriding is a process of heating steel in atmosphere of:

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

  1. $NH _{3}$

  2. $N _{2}$

  3. oxygen

  4. Carbon dioxide

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Correct Option: A
Explanation:

Nitrating is a process of heating high carbon steels, aluminium, molybdenum etc in atmosphere of $NH _3$. Because of nitrating a case hardened surface of $N _2$ is formed on metal surface which comes from Ammonia.