Chemistry
Grade-8
Easy

Question

When a thermometer is heated, the liquids inside the thermometer moves up. This is mainly because:

  1. liquid which is red is thin. 
  2. The molecules of the liquid move faster and get a little further apart.
  3. When liquid gets heated then it becomes lighter.
  4. The glass get hot.

hintHint:

Heat is a form of energy that excites liquid particles.

The correct answer is: The molecules of the liquid move faster and get a little further apart.


    • When a thermometer is heated, the liquids inside the thermometer move up. This is mainly because the molecules of the liquid move faster and get a little further apart.
    • The thermometer consists of a liquid called mercury which has the capability to rise when it witnesses high temperature. As the particles of this liquid gain heat energy due to a rise in temperature, their electrons jump to higher energy levels. Due to excitement, these particles vibrate and start moving quickly. In doing so they collide with each other and move far apart from each other. Due to this reason, the liquid appeared to rise in the thermometer. 

    Mercury is the only metal that exist in liquid form.

    Related Questions to study

    Grade-8
    Chemistry

    When you heat a sample of gas, what happens to the particles that make up the gas?

    This phenomenon is used by various industries to heat up the gas.

    When you heat a sample of gas, what happens to the particles that make up the gas?

    ChemistryGrade-8

    This phenomenon is used by various industries to heat up the gas.

    Grade-8
    Chemistry

    Water on wax paper don’t break easily when they touch each other, this is mainly because:

    Water lingers towards adhesion more than it does towards cohesion.

    Water on wax paper don’t break easily when they touch each other, this is mainly because:

    ChemistryGrade-8

    Water lingers towards adhesion more than it does towards cohesion.

    Grade-8
    Chemistry

    When an iron rod is heated, it gets longer upon beating, this is because the particles in the iron rod:

    The iron rod, on heating initially becomes red, then orange, and finally turns blue.

    When an iron rod is heated, it gets longer upon beating, this is because the particles in the iron rod:

    ChemistryGrade-8

    The iron rod, on heating initially becomes red, then orange, and finally turns blue.

    parallel
    Grade-8
    Chemistry

    The coordination number of Y will be in the XY types of crystal (Crystal is sodium chloride)

    The coordination number refers to the number of atoms that surround one other atom and vice versa.

    The coordination number of Y will be in the XY types of crystal (Crystal is sodium chloride)

    ChemistryGrade-8

    The coordination number refers to the number of atoms that surround one other atom and vice versa.

    Grade-8
    Chemistry

    Which of the following is not a characteristic property of solids?

    The strength of intermolecular forces of attraction decreases as we move from solids to gases.

    Which of the following is not a characteristic property of solids?

    ChemistryGrade-8

    The strength of intermolecular forces of attraction decreases as we move from solids to gases.

    Grade-8
    Chemistry

    A crystalline solid:

    Crystalline solids have a high melting point

    A crystalline solid:

    ChemistryGrade-8

    Crystalline solids have a high melting point

    parallel
    Grade-8
    Chemistry

    A unit cell of NaCl is made up of:

    The ionic structure is overall neutral if positive charge is equal to the negative charge.

    A unit cell of NaCl is made up of:

    ChemistryGrade-8

    The ionic structure is overall neutral if positive charge is equal to the negative charge.

    Grade-8
    Chemistry

    Which of the following has the highest rate of evaporation is

    When gasoline evaporates, the components with a low boiling point are lost first.

    Which of the following has the highest rate of evaporation is

    ChemistryGrade-8

    When gasoline evaporates, the components with a low boiling point are lost first.

    Grade-8
    Chemistry

    Which of the following solids is not an electrical conductor?
    (i) MgO(s)
    (ii)  I2 (s)
    (iii) H2O (s)

    Metals possess the ability to act as electric conductors.

    Which of the following solids is not an electrical conductor?
    (i) MgO(s)
    (ii)  I2 (s)
    (iii) H2O (s)

    ChemistryGrade-8

    Metals possess the ability to act as electric conductors.

    parallel
    Grade-8
    Chemistry

    When you heat a sample of a solid, the particles in it becomes:

    When particles try to move away from each other, they result in expanding the solids.

    When you heat a sample of a solid, the particles in it becomes:

    ChemistryGrade-8

    When particles try to move away from each other, they result in expanding the solids.

    Grade-8
    Chemistry

    Which of the following statements will describe a gas,

    Gas particles are free to move because of less force acting on them.

    Which of the following statements will describe a gas,

    ChemistryGrade-8

    Gas particles are free to move because of less force acting on them.

    Grade-8
    Chemistry

    Mist is a mixture of:

    The dispersed phase of a mist is liquid and the dispersion medium is gas.

    Mist is a mixture of:

    ChemistryGrade-8

    The dispersed phase of a mist is liquid and the dispersion medium is gas.

    parallel
    Grade-8
    Chemistry

    Choose the statement that is incorrect:

    The particles called atoms consist of subatomic particles like electrons, protons, and neutrons.

    Choose the statement that is incorrect:

    ChemistryGrade-8

    The particles called atoms consist of subatomic particles like electrons, protons, and neutrons.

    Grade-8
    Chemistry

    Which of the following statement is not true about amorphous solids?

    Anisotropic nature is a property of crystalline solids.

    Which of the following statement is not true about amorphous solids?

    ChemistryGrade-8

    Anisotropic nature is a property of crystalline solids.

    Grade-8
    Chemistry

    Which of the following is an amorphous solid?

    Crystalline solids are the ones that have a certain arrangement in the organization of their molecules.

    Which of the following is an amorphous solid?

    ChemistryGrade-8

    Crystalline solids are the ones that have a certain arrangement in the organization of their molecules.

    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.