Tag: nitrogen and sulfur

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Questions Related to nitrogen and sulfur

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

Which has the highest $pK _b$ value ?

  1. $R _3N$
  2. $R _2NH$
  3. $RNH _2$
  4. $NH _3$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Ammonia is a weak base so it has pK value of 4. So the order of basicity is ammonia<primary<tertiary amines <secondary amines. This order depends on steric hindrance. The size of alkyl group is more than that of hydrogen atom. So alkyl group hinders the attack of hydrogen atom and decreases the basicity of molecule. So more the number of alkyl groups lesser will be its basicity.

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

Which of the following forms hydrogen bond?

  1. $\displaystyle { CH } _{ 4 }$
  2. $\displaystyle { CO } _{ 2 }$
  3. $\displaystyle { NH } _{ 3 }$
  4. $\displaystyle { N } _{ 2 }$
  5. $\displaystyle { O } _{ 2 }$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Hydrogen bonding occurs when hydrogen is covalently bonded to a highly electronegative atom like nitrogen, oxygen, or fluorine. Ammonia (NH3) satisfies this condition.

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

Statement 1: $NH _{3}$ can be best collected by water displacement.

Statement 2: $NH _{3}$ is a polar substance.

  1. <p>Both Statement 1 and Statement 2 are correct and Statement 2 is the correct explanation of Statement 1</p>

  2. <p>Both Statement 1 and Statement 2 are correct and Statement 2 is not the correct explanation of Statement 1</p>

  3. <p>Statement 1 is correct but Statement 2 is not correct</p>

  4. <p>Statement 1 is not correct but Statement 2 is correct</p>

  5. <p>Both the Statement 1 and Statement 2 are not correct</p>
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Nitrogen, oxygen and hydrogen can be collected by water displacement because they are only slightly soluble in water. But hydrogen chloride or ammonia can not be separated since both are very highly soluble in water and will react to form hydrochloric acid or ammonium hydroxide respectively so statement 1 is not true.

$NH _3$ is a polar substance so statement 2 is correct.

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

When excess of ammonia is used:


 $3Cl _2+8NH _3$$\longrightarrow$$A+B$

When excess of chlorine is used:

$3Cl _2+4NH _3$$\longrightarrow$$C+D$

The oxidation state of nitrogen in compound $A$ is:

  1. $-3$
  2. $+3$
  3. $+5$
  4. $0$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

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

 Compound A is $NH _4Cl$ 

$1(x)+4(1)+1(-1)=0$

$x+4-1=0$

$x=-3$

The oxidation state of compound A is $-3$

Hence option A is correct.

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

When excess of ammonia is used:
 $3Cl _2+8NH _3$$\longrightarrow$$A+B$
When access of chlorine is used:
$3Cl _2+4NH _3$$\longrightarrow$$C+D$
Oxidation state of nitrogen in compound $B$ is:

  1. $0$
  2. $+1$
  3. $+3$
  4. $-3$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

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

$3Cl _2+4NH _3 \rightarrow  3NH _4Cl+NCl _3$

 Compound  B is $N _2$ Here as the nitrogen is in elemental state so its oxidation state is $0$

 Hence option A is correct.

Multiple choice chemistry nitrogen and sulfur sulfur and its oxides acid deposition natural resources- air, water and land

Acid rain may cause :

  1. rusting easier

  2. Stone-cancer in Taj Mahal

  3. Non-fertility of soil

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Acid rain contains acids formed due to combination of sulphur and nitrous oxides present in the smoke discharged by the industries. These acids are highly corrosive in nature and cause rusting of metal assemblies. Also can affect structures like Taj Mahal by reacting with their material of construction. Moreover, can affect the fertility of soil. So, All of the above is the answer.