Carbon Dioxide

Q. What is the percentage of carbon dioxide in the atmosphere?

Q.

Carbon dioxide is used in extinguishing a fire.

1. False

2. True

Q.

What is the percentage range of Carbon dioxide in the atmosphere of the earth?

1. 0.02%-0.03%

2. 0.05%-0.07%

3. 0.1%-0.2%

4. 0.04%-0.06%

Q.

Statement 1- Lime water turns milky when air is passed through the solution.

Statement 2- Air contains carbon dioxide which turns lime water milky.

1. Statement 1 is True and Statement 2 is True

2. Statement 1 is False and statement 2 is False

3. Statement 1 is False and statement 2 is True

4. Statement 1 is True and statement 2 is False

Q.

In $C{O}_2$, hybridization of carbon is:

1. $sp$

2. $s{p}^3$

3. $Noneofthese$

4. $s{p}^2$

Q.

Why do we need to conserve mineral resources?

Q.

The most common element used as fire extinguisher is

1. 
   

   $C{O}_2$

2. oxygen
3. phosphorus
4. 
   $N{O}_2$
   

Q.

Which of the following gases are used as fire extinguisher?

1. Oxygen

2. Nitrogen

3. Carbon dioxide

4. Helium

Q.

___dissolved in water helps in photosynthesis of aquatic plants.

1. Sulphur

2. Nitrogen

3. None

4. Carbon dioxide

Q. <!--td {border: 1px solid #cccccc;}br {mso-data-placement:same-cell;}--> Why is CNG considered as a green fuel?

Q.

Carbon dioxide is used in fire extinguishers to put out fires.Why?

Q.

Name the component of air that has maximum solubility in water.

1. Oxygen

2. Nitrogen

3. Hydrogen

4. Carbon dioxide

Q.

Which of the following steps is not involved in carbon cycle?

1. Respiration

2. Photosynthesis

3. Burning of fossil fuel

4. Transpiration

Q.

Nitrogen is used in the fire extinguisher.

1. True
2. False

Q.

The most common element used as fire extinguisher is

1. 
   

   $C{O}_2$

2. oxygen
3. phosphorus
4. 
   $N{O}_2$
   

Q.

In which of the following processes $C{O}_2$ is involved?

1. Photosynthesis

2. Burning of fossil fuel

3. Transpiration

4. Respiration

Q. carbon dioxide is a green house gas , then why do fire extinguishers contain carbon di oxide

Q.

Biogas mainly consists of:

1. ethane

2. methane

3. propane

4. butane

Q.

During the winter season, a person sleeps in a closed room with burning firewood. He experiences nausea and giddiness. The emission of which of the following gas is responsible for it?

1. Carbon dioxide

2. Carbon monoxide

3. Nitrous oxide

4. Sulphur dioxide

Q. Which of the following is not correct about water? ​

1. It plays an important role in the metabolic processes occurring in human body. ​

2. Saline water is used for drinking. ​

3. It is released by plants in the process of photosynthesis. ​

4. It can change from one physical state to another.​

1. 2 and 3
2. Only 3
3. 3 and 4
4. 2 and 4

Q. Which of the following is used to make soda water as well as aerated soft drinks?

1. Carbon monoxide.
2. Carbon dioxide.
3. Methane.
4. Ethane.

Q. A solution reacts with marble chips to produce a gas which turns lime water milky. The solution contains:

1. $N{a}_{2}S{O}_4$
2. $K_{2}S{O}_4$
3. $CaS{O}_4$
4. $H_{2}S{O}_4$

Q.

Fossil fuels and metallic minerals are renewable resources.

1. Renewable resources

2. Combustable

Q. The gas which turns lime water milky is

(a) oxygen
(b) carbon dioxide
(c) hydrogen
(d) nitrogen

Q. Question 32
Manu was heating oil to fry potato chips. The cooking oil all of a sudden caught fire; he poured water to extinguish the fire. Do you think this action was suitable?If yes, why? If not, why not? In such a condition what should Manu have done?

Q. The process by which a solid directly converts into its gaseous state is known as ______.

1. vaporisation
2. deposition
3. evaporation
4. sublimation

Q.

With the help of an activity, show that air contains carbon dioxide.

Q. Expand PCRA?