What happens when \$CO_2\$ is passed through lime water(i) for short duration(ii) for a long duration?

(i) When \$CO_2\$ is passed through lime water for a short duration, it turns lime water milky due to the formation of a white precipitate of calcium carbonate.\$Ca(OH)_2 + CO_2 \rightarrow CaCO_3 + H_2O\$ (White ppt)(ii) When excess of carbon dioxide gas is passed through lime water then the white precipitate calcium carbonate formed first dissolves due to the formation of a soluble salt calcium hydrogen carbonate \$Ca(HCO_3)_2\$, and the solution becomes clear again. \$CaCO_3 + CO_2 + H_2O \rightarrow Ca(HCO_3)_2\$ (Soluble)

Explain why?Lime water turns milky, when carbon dioxide gas is passed into it.

When \$CO_2\$ passes through lime water, it turns into milky lime water due to formation of insoluble calcium carbonate. \$Ca(OH)_2 + CO_2 \rightleftharpoons CaCO_3(+) + H_2O\$IOf \$CO_2\$ is passed for longer period, turbidity disappears due to form of soluble calcium bicarbonate.\$CaCO_3 + H_2O +CO_2 \rightleftharpoons Ca(HCO_3)_2\$ .

Producer gas is a mixture of:

Producer gas:A combustible mixture of nitrogen, carbon monoxide, and hydrogen, generated by passing air with steam over burning coke or coal in a furnace and used as fuel. Also called air gas.

Which off the following is a neutral oxide?

Neutral oxides are oxides which are neither acidic nor basic. In other words, oxides which neither react with acids or with bases are called neutral oxides. Some of the examples of neutral oxides are a nitrous oxide (N2O), nitric oxide (NO), carbon monoxide (CO).

\$CO + H_{2}\$ is known as:

The mixture of carbon monoxide \$(CO)\$ and hydrogen \$(H_2)\$ is called water gas. Syn gas is a mixture of \$CO, CO_2\$ and \$H_2\$.Producer gas is a mixture of flammable gases (principally carbon monoxide and hydrogen) and nonflammable gases (mainly nitrogen and carbon dioxide).Semi-water gas is a mixture of water gas and producer gas made by passing a mixture of air and steam through heated coke.Hence, option A is correct.

Which of the following is a sink for \$CO\$?

Micro organism present in the soil behave as sink for \$CO\$.Hence, option C is correct.

The type of bond between atoms in a molecule of \$CO_{2}\$ is:

Option \$(C)\$ is correct.The type of bond between atoms in a molecule of \$CO_2\$ is polar covalent bond. In carbon dioxide molecule, a carbon atom is joined by four covalent bonds to two oxygen atoms, which have two covalent bonds each.

Why is carbon-dioxide gas used to extinguish fire?

It is because carbon-dioxide does not support combustion. When sprayed on burning object it stops the supply of oxygen and extinguishes fire.

Burning magnesium ribbon is brought in the gas jar of carbon dioxide.Which of the following is correct?(i) It keeps on burning (ii) It gets extinguished(iii) Although \$C{O}_{2}\$ is non-supporter of combustion burning magnesium breaks \$C{O}_{2}\$ into carbon and oxygen helps in burning(iv) Carbon dioxide is the supporter of combustion

Magnesium burns in carbon dioxide because the oxygen in the carbon dioxide is able to bond with magnesium and produce an oxide.Hence it keeps on burning.\$2Mg(s) +C{O}_{2}(g)\rightarrow 2MgO(s) +C(s)\$So the correct option is (i) and (iii).

Suggest a reason as to why \$CO\$ is poisonous.

CO is very toxic as it can form complex with haemoglobin in the red blood cells. Haemoglobin combines with oxygen to form oxyhaemoglobin\$\displaystyle Haemoglobin + O_2 \rightleftharpoons Oxyhaemoglobin \$Oxyhamoglobin (formed in lungs) is carried to different cells where it gives its oxygen. CO has stronger affinity for Haemoglobin than oxygen. Due to this, the oxygen carrying capacity of blood is destroyed.. This results in suffocation and finally death.

Carbon Dioxide | Definition, Examples, Diagrams

definition

Physical properties of carbon dioxide

Carbon dioxide is a colourless odourless gas, is soluble in water, in ethanol and in acetone, has melting point of -55.6

^{o}

C, has boiling point of -78.5

^{o} C

and has density 1.977g/ml.

definition

Chemical properties of carbon dioxide

Carbon dioxide is an acidic oxide and reacts with water to give carbonic acid. Carbon dioxide reacts with alkalis to give carbonates and bicarbonates.

definition

Uses of carbon dioxide

1.Large quantities of solid carbon dioxide (i.e. in the form of dry ice) are used in processes requiring large scale refrigeration.
2. Carbon dioxide is also used in fire extinguishers as a desirable alternative to water for most fires.
3. It is a constituent of medical gases as it promotes exhalation. It is also used in carbonated drinks.

definition

Method of prepration of Carbon dioxide

1. It is prepared by complete combustion of carbon and carbon containing fuels in excess of air.
2.It is prepared in the laboratory by the action of dilute HCl on calcium carbonate.

definition

Properties and uses of dry ice

1. Dry ice is comprising two oxygen atoms bonded to a single carbon atom.

2. It is colorless, with a sour zesty odor, non-flammable, and slightly acidic.

3. At pressures below 5.13 atm and temperatures below 56.4 C (69.5 F) $C O_{2}$ changes from a solid to a gas with no intervening liquid form, through a process called sublimation.

4. The opposite process is called deposition, where $C O_{2}$ changes from the gas.

Carbon Dioxide

definition

Physical properties of carbon dioxide

definition

Chemical properties of carbon dioxide

definition

Uses of carbon dioxide

definition

Method of prepration of Carbon dioxide

definition

Properties and uses of dry ice

REVISE WITH CONCEPTS

Carbon Monoxide

Quick Summary With Stories

Carbon Dioxide-preparation and Properties

What happens when $C O_{2}$ is passed through lime water
(i) for short duration
(ii) for a long duration?

Explain why?
Lime water turns milky, when carbon dioxide gas is passed into it.

Producer gas is a mixture of:

Which off the following is a neutral oxide?

$C O + H_{2}$ is known as:

Which of the following is a sink for $C O$ ?

The type of bond between atoms in a molecule of $C O_{2}$ is:

Why is carbon-dioxide gas used to extinguish fire?

Suggest a reason as to why $C O$ is poisonous.

definition

Physical properties of carbon dioxide

definition

Chemical properties of carbon dioxide

definition

Uses of carbon dioxide

definition

Method of prepration of Carbon dioxide

definition

Properties and uses of dry ice

REVISE WITH CONCEPTS

Carbon Monoxide

Quick Summary With Stories

Carbon Dioxide-preparation and Properties

What happens when CO2​ is passed through lime water (i) for short duration (ii) for a long duration?

Explain why?Lime water turns milky, when carbon dioxide gas is passed into it.

Producer gas is a mixture of:

Which off the following is a neutral oxide?

CO+H2​ is known as:

Which of the following is a sink for CO?

The type of bond between atoms in a molecule of CO2​ is:

Why is carbon-dioxide gas used to extinguish fire?

Suggest a reason as to why CO is poisonous.

What happens when $C O_{2}$ is passed through lime water
(i) for short duration
(ii) for a long duration?

Explain why?
Lime water turns milky, when carbon dioxide gas is passed into it.

$C O + H_{2}$ is known as:

Which of the following is a sink for $C O$ ?

The type of bond between atoms in a molecule of $C O_{2}$ is:

Suggest a reason as to why $C O$ is poisonous.