Tag: nitrogen

Quizzes (0) Questions (101)

Questions Related to nitrogen

Multiple choice chemistry nitrogen and sulfur nitrogen gas component of air - nitrogen nitrogen

Assertion : Nitrogen is inactive in normal chemical reactions.
Reason : The bond dissociation energy is directly proportional to reactivity.

  1. Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion

  2. Both Assertion and Reason are correct but the Reason is not the correct explanation of the Assertion

  3. Assertion is correct but the Reason is incorrect

  4. Assertion is incorrect but the Reason is correct
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The bond dissociation energy is inversely proportional to reactivity.
Nitrogen is inactive in normal chemical reactions due to its high bond dissociation energy.

Multiple choice chemistry nitrogen and sulfur nitrogen gas component of air - nitrogen nitrogen

Which of the following gives blue flame when burn and is not very soluble in water?

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

Nitrogen burns with a blue flame and is not very soluble in water.

Multiple choice chemistry nitrogen and sulfur nitrogen gas component of air - nitrogen nitrogen

Which is the volatile covalent liquid at $25^\circ\text C$ and 1 atm ?

  1. N$ _2$

  2. Kl
  3. CCl$ _4$
  4. AgNO$ _3$
  5. CaCO$ _3$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Usually, compounds comprising of only non-metals tend to have covalent bonds. Therefore, among the given options, only A and C are covalent compounds. However, between the two, $N _2$ exists as a gas. $CCl _4$ is a covalent compound that exists as a liquid at standard temperature and pressure.

Multiple choice chemistry nitrogen and sulfur nitrogen gas component of air - nitrogen nitrogen

Which of the following forms a white precipitate when added to a solution of $NaCl$?

  1. $N _2$
  2. $KI$
  3. $CCl _4$
  4. $AgNO _3$
  5. $CaCO _3$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Silver nitrate $\displaystyle AgNO _3$ forms a white precipitate of $AgCl$ when added to a solution of $NaCl$. 

$\displaystyle AgNO _3 + NaCl \rightarrow AgCl \uparrow + NaNO _3$

Multiple choice chemistry nitrogen and sulfur nitrogen gas component of air - nitrogen nitrogen

What is the key element in soil fertilizer?

  1. Carbon

  2. Nitrogen

  3. Oxygen

  4. Neon

  5. Argon
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Nitrogen is the key element in soil fertilizer. It is essential for plant growth but plants cannot utilize atmospheric nitrogen as it is inert due to presence of triple bond. Hence, it is supplied through fertilizer.

Multiple choice chemistry nitrogen and sulfur nitrogen gas component of air - nitrogen nitrogen

Which of the following statements regarding nitrogen sesquioxide is not correct?

  1. Nitrogen sesquioxide is stable only in the liquid state. It dissociated in the vapour phase

  2. Dinitrogen sesquioxide is a neutral oxide
  3. Dinitrogen sesquioxide contains a weak $N - N$ bond

  4. Dinitrogen sesquioxide exists in two different crystalline forms
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Nitrogen sesquioxide or dinitrogen trioxide $(N _2O _3)$ is an acidic oxide. It is an anhydride of nitrous acid and dissolves in water to form $HNO _2$, an unstable acid.

$N _2O _3 + H _2O \rightarrow 2HNO _2$
Multiple choice chemistry nitrogen and sulfur nitrogen gas component of air - nitrogen nitrogen

Which of the following is the density of nitrogen at STP?

  1. $0.33g/L$
  2. $0.65g/L$
  3. $0.80g/L$
  4. $1.25g/L$
  5. $1.60g/L$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

At STP, one mole of any gas occupies 22.4litres of volume. Nitrogen exists in molecular form as $N _2$. 

So, $Denisty= \dfrac{\text Molecular \ mass}{\text Volume}$

Here a Molecular mass of one mole of $N _2$. is 14(2)=28 grams and Volume is 22.4 litres.
So $Denisty= \dfrac{28}{22.4}g/L = 1.25g/L$.
Option D is correct

Multiple choice chemistry nitrogen and sulfur nitrogen gas component of air - nitrogen nitrogen

Which of the following gas, when ignited, burns with a blue flame and is not very soluble in water?

  1. $O _2$
  2. $CO _2$
  3. $N _2$
  4. $He$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Nitrogen when ignited in presence of oxygen it forms various oxides of nitrogen like $NO,\ NO _2$ and burns with a blue flame.
Hence, option $C$ is correct.