Tag: nitrogen and sulfur

Questions Related to nitrogen and sulfur

Which has the highest $pK _b$ value ?

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

  1. $R _3N$

  2. $R _2NH$

  3. $RNH _2$

  4. $NH _3$

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Correct Option: D
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.

Which of the following forms hydrogen bond?

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

  1. $\displaystyle { CH } _{ 4 }$

  2. $\displaystyle { CO } _{ 2 }$

  3. $\displaystyle { NH } _{ 3 }$

  4. $\displaystyle { N } _{ 2 }$

  5. $\displaystyle { O } _{ 2 }$

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Correct Option: C

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

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

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

  1. Both Statement 1 and Statement 2 are correct and Statement 2 is the correct explanation of Statement 1

  2. Both Statement 1 and Statement 2 are correct and Statement 2 is not the correct explanation of Statement 1

  3. Statement 1 is correct but Statement 2 is not correct

  4. Statement 1 is not correct but Statement 2 is correct

  5. Both the Statement 1 and Statement 2 are not correct

Show answer
Correct Option: D
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.

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:

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

  1. $-3$

  2. $+3$

  3. $+5$

  4. $0$

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Correct Option: A
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.

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:

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

  1. $0$

  2. $+1$

  3. $+3$

  4. $-3$

Show answer
Correct Option: A
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.

What is the nature of normal rain water?

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

  1. Neutral

  2. Acidic

  3. Basic

  4. None

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Correct Option: B
Explanation:

Normal rain water is slightly acidic (pH is 5-6)

Acid rain may cause :

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

  1. rusting easier

  2. Stone-cancer in Taj Mahal

  3. Non-fertility of soil

  4. All of the above

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Correct Option: D
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.

Which of the following is correct about bleaching action of $\mathrm{S}\mathrm{O} _{2}$?

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

  1. Oxidation property

  2. Hydrolysis

  3. Reduction property

  4. Its acidic nature

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Correct Option: C
Explanation:

Bleaching action of $SO _{2}$ is due to its reduction property. It takes up oxygen from coloured material and makes it colourless.

Which of the following acids is used in car batteries?

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

  1. Nitric acid

  2. Hydrochloric acid

  3. Sulphuric acid

  4. Carbonic acid

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Correct Option: C
Explanation:

Lead-acid batteries are made up of plates of lead and separate plates of lead dioxide, which are submerged into an electrolyte solution of about $38%$% $H _2SO _4$ and $62$% water.

The burning of fossil fuels is the main source of which of the following pollutants?

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

  1. Nitrogen

  2. Carbon monoxide

  3. Sulphur dioxide

  4. Particulate matter

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Correct Option: C
Explanation:

Fossil fuels are made of sulphur so on burning they form sulphur dioxide as a product.