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

In plants, atmospheric nitrogen is converted into : 

  1. carbohydrate

  2. proteins

  3. amino acids

  4. fats
Reveal answer Fill a bubble to check yourself
B,C Correct answer
Explanation

Nitrogen fixation is a process in which nitrogen ($N _2$) in the atmosphere is converted into ammonium ($NH _4^+$). Nitrogen fixation, natural and synthetic, is essential for all forms of life because nitrogen is required to biosynthesize basic building blocks of plants, animals and other life forms, e.g., nucleotides for DNA and RNA and amino acids for proteins. 

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

If the amount of nitrogen in air is low, then the burning capacity of air decreases.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Nitrogen is not combustible under ordinary circumstances. In fact, the National Fire Protection Association has given nitrogen a flammability rating of zero so it has no effect on burning.

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

$Ca+C _{2}\rightarrow CaC _{2} + N _2\rightarrow A$


Compound (A) is used as a/an:

  1. fertillizer

  2. dehydrating agent

  3. oxidising agent

  4. reducing agent
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

$Ca+C _2\rightarrow CaC _2+N _2\rightarrow  Ca(CN) _2$


So, $CaC _2$ is used as ripening agent and $Ca(CN) _2$ used as fertilizer.


Hence, option A is correct.

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

$\mathrm{A}$ nitrogenous fertilizers having more nitrogen is :

  1. $(\mathrm{N}\mathrm{H} _{4}) _{2}\mathrm{S}\mathrm{O} _{4}$
  2. $Ca(NO _{3}) _2$
  3. $NH _{2}CONH _{2}$
  4. $NH _4NO _3$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Percentage of $N _2$ in following compounds is calculated by formula 
$(atomic weight of N _2 in compound / Atomic weight  the compound)\times100$
So, percentage of $N _2$ in compounds is given as
In ${(NH _4)} _{2}SO _4$ it is 21%
In $Ca{(NO _3)} _{2}$ it is 17%
In $NH _2CONH _2$ it is 47%
In $NH _4NO _3$ it is 35%.

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

Which one of the following statement is not correct for  $N _{2}$?

  1. It has small size

  2. It is a typical non metal

  3. It does not eadily react with oxygen

  4. d-orbitals are available for bonding
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

d-orbitals are not available for bonding in N. 
there are not any 2d orbitals 
Electronic configuration: $1s^{2} 2s^{2} 2p^{3}$

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

Assertion (A): Anhydrous Calcium chloride is used as catalyst in cyanamide process
Reason (R): Catalyst increases the rate of reaction.

  1. Both (A) and (R) are true and (R) is the correct explanation of (A)

  2. Both (A) and (R) are true and (R) is not the correct explanation of (A)

  3. (A) is true and (R) is false

  4. (A) is false but (R) is true
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Catalyst increases the rate of reaction both in forward and reverse direction by decreasing the activation energy.
In cyanamide process, calcium chloride is used to increase the rate.

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.