Tag: chemistry

Questions Related to chemistry

Calcium imide on hydrolysis will give gas (B) which on oxidation by bleaching powder gives gas (C). Gas (C) on reaction with magnesium gives compound (D). (D) on hydrolysis gives again gas (B). (B), (C) and (D) respectively are :

chemistry nitrogen and sulfur ammonia and fertilizers preparation of ammonia-laboratory method and haber's process ammonia

  1. ${NH _3}$, ${N _2}$, ${Mg _3N _2}$

  2. ${N _2}$, ${NH _3}$, $Mg _3N _2$

  3. ${N _2}$, ${N _2O _5}$, ${Mg(NO _3) _2}$

  4. ${NH _3}$, ${NO _2}$, ${Mg(NO _2) _2}$

Show answer
Correct Option: A
Explanation:

Reactions :
$CaNH+H _2O\rightarrow CaO+NH _3$
$3CaOCl _2 + 2NH _3\rightarrow 3CaCl _2 + 3H _2O + N _2$
$3Mg + N _2 \rightarrow Mg _3N _2$
$Mg _3N _2 + 6 H _2O \rightarrow 3Mg(OH) _2 + 2NH _3$

Natural gas is a major feed stock for the production of ________

chemistry nitrogen and sulfur ammonia and fertilizers preparation of ammonia-laboratory method and haber's process ammonia

  1. Ammonia

  2. potassium

  3. sodium

  4. phosphorus

Show answer
Correct Option: A

$NH _3$ can't be obtained by :

chemistry nitrogen and sulfur ammonia and fertilizers preparation of ammonia-laboratory method and haber's process ammonia

  1. heating of $NH _4NO _3$ or $NH _4NO _2$

  2. heating $NH _3CI$ or $(NH _4) _2CO _3$

  3. heating of $NH _4NO _3$ with $NaOH$

  4. reaction of $AIN$ or $Mg _3N _2$ or $CaCN _2$ with $H _2O$

Show answer
Correct Option: A
Explanation:

Reactions are:
$NH _4NO _3\rightarrow N _2O+H _2O$
$NH _4NO _2\rightarrow N _2+H _2O$
$NH _4Cl\rightarrow NH _3+HCl$
$NH _4NO _3 (aq) + NaOH(s)\rightarrow NH _3(g) +H _2O (l)+ NaNO _3(aq)$
$CaCN _2+3H _2O\rightarrow CaCO _3+NH _3$

$Fe^{2+}$ reduces $NH _2OH$ to : 

chemistry nitrogen and sulfur ammonia and fertilizers preparation of ammonia-laboratory method and haber's process ammonia

  1. $NH _3$

  2. $N _3H$

  3. $N _2H _4$

  4. $N _2$

Show answer
Correct Option: A

Calcium cyanamide on treatment with steam produces :

chemistry nitrogen and sulfur ammonia and fertilizers preparation of ammonia-laboratory method and haber's process ammonia

  1. $NH _3+CaO$

  2. $NH _3+CaHCO$

  3. $NH _3+CaCO _3$

  4. $NH _3+Ca(OH) _2$

Show answer
Correct Option: C
Explanation:

Reaction:
$CaCN _2+3H _2O\rightarrow CaCO _3+NH _3$

$NH _4CI(s)$ is heated in a test tube, vapours are brought in contact with red litmus paper, which changes to blue and then to red. it is because of : 

chemistry nitrogen and sulfur ammonia and fertilizers preparation of ammonia-laboratory method and haber's process ammonia

  1. formation of $NH _4OH$ and $HCI$

  2. formation of $NH _3$ and $HCI$

  3. greater diffusion of $NH _3$ than $HCI$

  4. grater diffusion of $HCI$ than $NH _3$

Show answer
Correct Option: C
Explanation:

$NH _4Cl\xrightarrow{\Delta} NH _3+HCl$
First HCl reacts with red litmus and converts it into blue but as diffusion of ammonia is high so after that ammonia reacts with blue litmus and converts back to red.

$NH _4Cl, NH _4NO _3$ and $(NH _4) _2CO _3$ gives  $NH _3$ gas on heating.

chemistry nitrogen and sulfur ammonia and fertilizers preparation of ammonia-laboratory method and haber's process ammonia

  1. True

  2. False

Show answer
Correct Option: B
Explanation:

Reaction:
$NH _4NO _3\rightarrow N _2O+2H _2O$
$NH _4Cl\rightarrow NH _3+HCl$
$(NH _4) _2CO _3\rightarrow 2 NH _3 + H _2O + CO _2$

Give the balanced reaction for the manufacture of the ammonia gas.

chemistry nitrogen and sulfur ammonia and fertilizers preparation of ammonia-laboratory method and haber's process ammonia

  1. $3{ N } _{ 2 }+3{ H } _{ 2 }\rightarrow 6{ NH } _{ 3 }$

  2. ${ N } _{ 2 }+3{ H } _{ 2 }\rightarrow 2{ NH } _{ 3 }$

  3. ${ N } _{ 2 }+3{ H } _{ 2 }\rightarrow { NH } _{ 3 }$

  4. ${ N } _{ 2 }+6{ H } _{ 2 }\rightarrow 4{ NH } _{ 3 }$

Show answer
Correct Option: B
Explanation:

${ N } _{ 2 }+3{ H } _{ 2 }\rightarrow 2{ NH } _{ 3 }$
In the manufacture of ammonia process employed is Haber-Bosch which occurs in the presence of catalyst at high temperature and high pressure.

An alkaline gas, which produces dense white fumes when reacted with HCl gas is________.

chemistry nitrogen and sulfur ammonia and fertilizers preparation of ammonia-laboratory method and haber's process ammonia

  1. ammonia

  2. chlorine

  3. nitrogen

  4. oxygen

Show answer
Correct Option: A
Explanation:

An alkaline gas which produces dense white fumes when reacted with HCl gas is ammonia and fumes are of compound ammonium chloride.

In the manufacture of ammonia, the catalyst used is :

chemistry nitrogen and sulfur ammonia and fertilizers preparation of ammonia-laboratory method and haber's process ammonia

  1. magnesium oxide

  2. silver

  3. gold

  4. nickel

Show answer
Correct Option: A
Explanation:

Several catalysts are being utilized. The catalyst is iron containing iron oxide, magnesium oxide, aluminium oxide and ruthenium on carbon.