Chemistry
Grade-6
Easy

Question

When liquid CO2 is cooled to –78.5 °C, it changes into a snow-white solid, which is called

  1. Dry CO2
  2. Dry solid
  3. Dry ice
  4. Snow ice

hintHint:

The use of solid carbon dioxide may help us in remembering and understanding it better. It is also used as a cooling agent, used to preserve food for a long time, etc.

The correct answer is: Dry ice


    When liquid CO2 is cooled to –78.5 °C, it changes into a snow-white solid, which is called Dry ice. 
    Dry ice sublime at -78 degree celsius that is in terms of kelvin is 194.65K in earth's atmosphere pressure. Sublimes means, on heating, it does not change to liquid but instead directly converted to gas. This is the reason why solid carbon dioxide is called dry ice.

    Related Questions to study

    Grade-6
    Chemistry

    Carbogen (a mixture of 95 % oxygen and 5 % carbon dioxide) is not used for

    Carbogen (a mixture of 95 % oxygen and 5 % carbon dioxide) is not used for

    ChemistryGrade-6
    Grade-6
    Chemistry

    Which gas makes up approximately 1 % of atmospheric air?

    Which gas makes up approximately 1 % of atmospheric air?

    ChemistryGrade-6
    Grade-6
    Chemistry

    The amount of water vapor present in the air is greater in

    The amount of water vapor present in the air is greater in

    ChemistryGrade-6
    parallel
    Grade-6
    Chemistry

    Which of the following gases is almost 1.5 times heavier than air?

    Which of the following gases is almost 1.5 times heavier than air?

    ChemistryGrade-6
    Grade-6
    Chemistry

    Match column A (inert gases) with column B (uses of inert gases).

    Match column A (inert gases) with column B (uses of inert gases).

    ChemistryGrade-6
    Grade-6
    Chemistry

    ______________ dissolved in water helps in the photosynthesis of aquatic plants.

    ______________ dissolved in water helps in the photosynthesis of aquatic plants.

    ChemistryGrade-6
    parallel
    Grade-6
    Chemistry

    The amount of moisture present in the air is known as the

    The amount of moisture present in the air is known as the

    ChemistryGrade-6
    Grade-6
    Chemistry

    The carbon dioxide gas is __________soluble in water.

    The carbon dioxide gas is __________soluble in water.

    ChemistryGrade-6
    Grade-6
    Chemistry

    When the water vapor freezes into the ice and falls on the ground as light white flakes, this form of water vapor is known as

    When the water vapor freezes into the ice and falls on the ground as light white flakes, this form of water vapor is known as

    ChemistryGrade-6
    parallel
    Grade-6
    Chemistry

    A tiny water droplet formed near the ground when vapor in the air condenses is known as

    A tiny water droplet formed near the ground when vapor in the air condenses is known as

    ChemistryGrade-6
    Grade-6
    Chemistry

    Which of the components are used to prepare fertilizers like urea from the following?

    Which of the components are used to prepare fertilizers like urea from the following?

    ChemistryGrade-6
    Grade-6
    Chemistry

    Identify the gas which is responsible for the depletion of the ozone layer.

    Identify the gas which is responsible for the depletion of the ozone layer.

    ChemistryGrade-6
    parallel
    Grade-6
    Chemistry

    An excess of_________ in the air causes respiratory problems.

    An excess of_________ in the air causes respiratory problems.

    ChemistryGrade-6
    Grade-6
    Chemistry

    Read the following paragraph carefully and fill in the blanks.
    Gases like ____P_____ and nitrogen dioxide get mixed in the rainwater to form acids like Q and R. When these Q and R combine with the rain, they make the rain acidic and become part of the ____S _____. Such acidic rain is known as acid rain.

    Read the following paragraph carefully and fill in the blanks.
    Gases like ____P_____ and nitrogen dioxide get mixed in the rainwater to form acids like Q and R. When these Q and R combine with the rain, they make the rain acidic and become part of the ____S _____. Such acidic rain is known as acid rain.

    ChemistryGrade-6
    Grade-6
    Chemistry

    Which of the following are the major causes of air pollution?
    (i)   (ii) 
    (iii)    (iv) 

    Which of the following are the major causes of air pollution?
    (i)   (ii) 
    (iii)    (iv) 

    ChemistryGrade-6
    parallel

    card img

    With Turito Academy.

    card img

    With Turito Foundation.

    card img

    Get an Expert Advice From Turito.

    Turito Academy

    card img

    With Turito Academy.

    Test Prep

    card img

    With Turito Foundation.