Tag: natural resources - air

Quizzes (1) Questions (65)

Questions Related to natural resources - air

Multiple choice biology natural disasters: winds, storms and cyclones composition of air introduction to air natural resources - air

Dinitrogen and dioxygen are main constituents of air, but these do not react with each other to form oxides of nitrogen because:

  1. the reaction is endothermic and requires very high temperature

  2. the reaction can be initiated only in presence of a catalyst

  3. oxides of nitrogen are unstable
  4. $N _{2}$ and $O _{2}$ are unreactive
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The main component of air are oxygen and they will only react together at a normal temperature. For the formation of oxides of nitrogen, a very high temperature is required. 

Multiple choice biology natural disasters: winds, storms and cyclones composition of air introduction to air natural resources - air

Warm air is heavier than cold air. State whether the above statement is true or false and explain.

  1. True, because warm air contains more heat

  2. True, because warm air molecules are separated by greater distances

  3. False, because molecules of warm air expand and become less dense

  4. False, because cold air contain extra temperature than hot air
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Warm air is lighter than cold air because they have more heat energy, which results in the increase in distances between the molecules. This decraeses the density, and hence makes it lighter than cold air.

Multiple choice biology natural disasters: winds, storms and cyclones composition of air introduction to air natural resources - air

During night time which is more prevalent?

  1. Sea breeze

  2. Land breeze

  3. Both A & B

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Land breeze is defined as a coastal breeze blowing at night from land to sea, caused by the difference in the rate of cooling of their respective surfaces.
Sea breeze is defined as a breeze blowing towards the land from the sea, especially during the day owing to the relative warmth of the land.

Multiple choice biology natural disasters: winds, storms and cyclones composition of air introduction to air natural resources - air

Argon is the major constituent of inert gases present in air.

  1. True

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

Argon is the most abundant and most used of the noble gases. Its chief uses are in metallurgy, where it provides an inert atmosphere in which hot metals can be worked. Because argon is so very unreactive, it prevents chemical reactions of the very hot metal being welded or forged.

Multiple choice biology natural disasters: winds, storms and cyclones composition of air introduction to air natural resources - air

Statement: Nitrogen is slightly heavier than air.


State whether the given statement is true or false.

  1. True

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

Nitrogen (N2) has a molar mass of approximately 28 g/mol, while air (a mixture of nitrogen and oxygen) has an average molar mass of approximately 29 g/mol. Therefore, nitrogen is slightly lighter than air, making the statement false.