MEDIUM
Earn 100

Sodium reacts with carbon dioxide and water to form:

22.73% studentsanswered this correctly

Important Questions on Air

EASY

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R

Assertion A :- Carbon forms two important oxides CO and CO2. CO is neutral whereas CO2 is acidic in nature.

Reason R :  CO2 can combine with water in a limited way to form carbonic acid, while CO is sparingly soluble in water.

In the light of the above statements, choose the most appropriate answer from the options given below :-

EASY
Which property of CO2 makes it biologically and geo-chemically important?
EASY
CO2 is passed through lime water. Initially the solution turns milky and then becomes clear upon continued bubbling of CO2. The clear solution is due to the formation of
MEDIUM

Give chemical equation for the reaction of carbon dioxide with water.

MEDIUM

Give a reason for the following.

The fizz is formed in aerated drinks.

EASY
Gas A is bubbled through slaked lime when a white precipitate is formed. On prolonged bubbling the precipitate is dissolved. On heating the resultant solution, the white precipitate reappears with evolution of gas B. The gases A and B respectively are
MEDIUM
Select the correct answer based on statements A and B. Give reasons for your answer.
A. Plants take in oxygen and give out carbon dioxide.
B. Plants take in carbon dioxide and give out oxygen.
 
MEDIUM

Give chemical equation for the reaction of carbon dioxide with alkalis.

EASY

Write scientific reasons. Limewater turns milky when CO2 is passed through it.

MEDIUM
What is dry ice? Why is it so called? Give its one use.
MEDIUM
Explain the following:
Carbon dioxide turns lime water milky. But if passed for a long time, the solution becomes clear again.
EASY

Circle the odd one and give reason for your choice.

Carbon dioxide, chlorophyll, sunlight, oxygen

HARD
KO2 is used in life supports in space crafts, submarines and emergency breathing apparatus since it
MEDIUM

Give chemical equation for the reaction of carbon dioxide with litmus solution.

HARD
The reaction between alkali and CO2g is slow. Because -
HARD

How will you verify the properties of carbon dioxide?

EASY
_____ is the cheapest form of carbon. (Carbon dioxide / Diamond)
EASY
Carbon dioxide can be prepared in laboratory by the action of a dilute acid on sodium carbonate.
MEDIUM
A fire of lithium, sodium and potassium can be extinguished by
EASY
The principal buffer present in human blood