Tag: nitrogen and sulfur

Questions Related to nitrogen and sulfur

Animals die in nitrogen because __________.

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

  1. It destroys haemoglobin.

  2. Of the want of oxygen.

  3. It is heavier than air.

  4. It is poisonous.

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Correct Option: B
Explanation:

Animals need oxygen for breathing. If they don't get oxygen they die.

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

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

  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

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Correct Option: C
Explanation:

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

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

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

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

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

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

  4. $\displaystyle { H } _{ 2 }{ SO } _{ 4 }$

  5. $\displaystyle He$

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Correct Option: C
Explanation:

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

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

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

  1. N$ _2$

  2. Kl

  3. CCl$ _4$

  4. AgNO$ _3$

  5. CaCO$ _3$

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Correct Option: C
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.

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

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

  1. $N _2$

  2. $KI$

  3. $CCl _4$

  4. $AgNO _3$

  5. $CaCO _3$

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Correct Option: D
Explanation:

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

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

What is the key element in soil fertilizer?

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

  1. Carbon

  2. Nitrogen

  3. Oxygen

  4. Neon

  5. Argon

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Correct Option: B
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.

Which of the following releases a gas with the addition of dilute acid?

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

  1. $N _2$

  2. $Kl$

  3. $CCl _4$

  4. $AgNO _3$

  5. $CaCO _3$

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Correct Option: E
Explanation:

$\displaystyle CaCO _3 + 2HCl \rightarrow CaCl _2 + H _2O + CO _2 \uparrow$
Thus, calcium carbonate reacts with $HCl$ to form carbon dioxide gas.

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

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

  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

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Correct Option: B
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.

$N _2O _3 + H _2O \rightarrow 2HNO _2$

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

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

  1. $0.33g/L$

  2. $0.65g/L$

  3. $0.80g/L$

  4. $1.25g/L$

  5. $1.60g/L$

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Correct Option: D
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

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

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

  1. $O _2$

  2. $CO _2$

  3. $N _2$

  4. $He$

Show answer
Correct Option: C
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.