Tag: chemical reactions

Quizzes (8) Questions (144)

Questions Related to chemical reactions

Multiple choice biology physical resources air as a natural resource types of chemical reactions chemical reactions

Which process takes place inside the living system only?

  1. Burning

  2. Respiration

  3. Heating

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

Respiration is a process that utilizes oxygen to breakdown glucose and release energy in the form of heat and ATP. It is a slow process that occurs inside living system only. However, burning is a fast process that occurs outside a living system.

Multiple choice biology physical resources air as a natural resource types of chemical reactions chemical reactions

Why is respiration considered an exothermic reaction ? Explain.

  1. reduction of glucose takes place

  2. produces large amount of heat energy.

  3. oxidation of glucose takes place

  4. All of the above
Reveal answer Fill a bubble to check yourself
B,C Correct answer
Explanation

Energy is required to support life. Energy in our body is obtained from the food we eat. During digestion, large molecules of food are broken down into simpler substances such as glucose. Glucose combines with oxygen in the cells and provides energy. The special name of this combustion reaction is respiration. Since energy is released in the whole process, it is an exothermic process.
$\underset{Glucose}{C _6H _{12}O _6(aq)} + \underset{Oxygen}{6O _2(g)} \rightarrow \underset{Carbon dioxide}{6CO _2(g)} + \underset{Water}{6H _2O(l)} + Energy$

Multiple choice biology physical resources air as a natural resource types of chemical reactions chemical reactions

Which of the following are the uses of air?

  1. Generating electricity

  2. Disposal of seeds

  3. Flying of birds

  4. All of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Air is a mixture of different types of gases, dust particles, water vapours, etc.
The important components of air are nitrogen, oxygen, argon, carbon dioxide, etc,

Air is a very important component of the earth because of the following reasons:

  1. The windmill is designed to harness electricity from the wind, so it can be used for the generated electricity.
  2. Air helps in the process of pollination or seeds disposal.
  3. It helps the birds to fly.

Hence, the correct option is $\text{D}$

Multiple choice biology physical resources air as a natural resource types of chemical reactions chemical reactions

During respiration, glucose and oxygen enter our body cells and waste products carbon dioxide and water leave the body cells by the process of:

  1. evaporation

  2. osmosis

  3. diffusion

  4. plasmolysis
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Breathing involves the exchange of gases in the lungs, a process which occurs by diffusion. The oxygen is then transported throughout the body. Carbon dioxide is the waste gas produced by respiration.


Thus, option C is correct.

Multiple choice biology physical resources air as a natural resource types of chemical reactions chemical reactions

Which one of the following is not a function of air?

  1. Combustion

  2. To fill the balloons and air strip

  3. Respiration

  4. Pollination of plants
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Air is a mixture of different types of gases, dust particles, water vapours, etc.
The important components of air are nitrogen, oxygen, argon, carbon dioxide, etc,
Air is a very important component of the earth because of the following reasons
  1. It provides us fresh oxygen for respiration process
  2. It supports the water cycle
  3. It facilitates pollination in plants
  4. Conduct sound and help in the transmission
  5. It helps in the combustion process.