Carbon Dioxide Preparation

Q.

(a) Name the chemicals required for the preparation of carbon dioxide in the laboratory.

(b) How will you collect the gas?

(c) Write the balanced chemical equation for the above reaction.

(d) Why is sulphuric acid not used for the preparation of carbon dioxide in the laboratory?

Q.

A substance X is used as a building material and is insoluble in water. When reacted with dilute $\mathrm{HCl}$, it produces a gas that turns lime-water milky. Predict the substance. Write the chemical equations involved.

Q.

What is Victor Meyers reagent?

Q.

______ should not be used for extinguishing fire caused by an electric short-circuit.

1. Nitrogen

2. Water

3. $C{O}_2$

4. Hydrogen

Q.

Which of the following process does not produce carbon dioxide?

1. Respiration
2. Burning of fuels
3. Combustion of wood
4. Photosynthesis

Q.

State one chemical test between the following pair:

Sodium carbonate and Sodium sulphite.

Q.

Name the gas released when sodium carbonate is added to a solution of sulphur dioxide.

Q.

How will you distinguish between fire extinguishing action of water and $C{O}_2$? [3 MARKS]

Q.

Give the chemical tests to distinguish between the following gases:

Oxygen and ammonia

Q. How does pouring of water extinguish fire?

1. Water drops the temperature below ignition point.
2. Water cuts the supply of carbon dioxide.
3. Water cuts the contact of fuel with air.
4. Water decreases the ignition temperature.

Q. Question 8
Explain how $C{O}_2$ is able to control fires.

Q. ${\mathrm{CO}}_2$ extinguishers help extinguish fires by.

1. reducing the heat
2. cutting the supply of oxygen.
3. limiting the supply of fuel.

Q. $C{O}_2$ fire extinguishers can be used to effectively put off fires involving all the below substances except:

1. electrical appliances
2. petrol
3. wood
4. plastic

Q. The gas which causes yellowing of Taj mahal:

1. $H_{2}S$
2. $S{O}_2$
3. $C{O}_2$
4. $N{H}_3$

Q. Assertion: Fuel oil is better than coal for use in industries.
Reason: It has a high calorific value than coal and does not leave smoke or ash on burning.

1. Both Assertion and Reason are true. Reason is not the correct explanation of Assertion.
2. Both Assertion and Reason are false.
3. Both Assertion and Reason are true. Reason is the correct explanation of Assertion.
4. Assertion is true and Reason is false

Q.

Write the equation for each of the following reactions:

Concentrated Sulfuric acid is poured over sugar.

Q. The life and appearance of the historic monuments like Taj Mahal are likely to be damaged by the presence of:

1. excess of $S{O}_2$
2. hydrocarbons
3. $CFC$
4. $C{l}_2$

Q. What will be the nature of the product formed when carbon is reacted with oxygen?

Q.

Identify the correct pairs of gases and their corresponding sources.

1. - Vehicles, Methane - Excreta of all living organisms, Water vapour - Sea water, - Plants​

2. - Excreta of all living organisms, Water vapour - Sea water, - Plants​, Methane - Vehicles

3. Methane - Vehicles, Water vapour - Excreta of all living organisms, - Plants, - Sea water

4. - Vehicles, Methane - Sea water, Water vapour - Excreta of all living organisms, - Plants

Q.

Which of the following is a method of preparation of $C{O}_2$?

1. By complete combustion of carbon

2. By action of dilute mineral acids on carbonates.

3. As a by-product from the manufacture of Hydrogen for making ammonia.

4. None of these

Q. Which of the following needs to be done inorder to put off fire?

1. Cut off oxygen supply
2. Limit fuel supply
3. Reduce surrounding heat
4. Increase surrounding heat

Q.

Write equation for the reaction between hydrochloric acid with manganese dioxide

Q.

The preparation of Lead sulphate from Lead carbonate is a two step Process

1. What is the first step that is required to prepare Lead sulphate from Lead carbonate
2. Write the equation for the reaction that will take place when this first step is carried out?