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applied chemistry
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  • 問題数 76 • 4/25/2024

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    問題一覧

  • 1

    What is solar energy?

    C.Energy from sunlight

  • 2

    What is the win energy?

    A. Energy from win

  • 3

    What is one of the applications of biothechnology?

    C. For health care and diagnosis

  • 4

    What is applied chemistry?

    B. Application of chemistry principle and theories to answer a specific question or solve a real-world probelm

  • 5

    What type of organisms fo through photosynthesis?

    B. Plants

  • 6

    What does the sun light provide for plants?

    B. Light energy

  • 7

    The chemical formula for glucose

    B. C6H12O6

  • 8

    The chemical equation for photosynthesis is

    D. Water + carbon dioxde + sunlight = oxygen + glucose

  • 9

    The conbustion is

    A. C3H8 + 5O2 -> 4H2O + energy

  • 10

    Chemical formula of “Rust” is

    D. Fe2O3.xH20

  • 11

    What is the useful chemical phenomenon?

    B. Photosynthesis

  • 12

    What is the harmful chemical phenomenon?

    A. Corrosion

  • 13

    Which one is renewable energy source

    B. Solar

  • 14

    Which one is unrenewable energy sources

    D. Oil

  • 15

    In an atom, the nucleons are

    C. Protons and neutrons

  • 16

    In an atom, the shells are

    A. Electrons

  • 17

    Matter in the _____ state has both a definite shape and volume.

    B. Solid

  • 18

    Which one of the following is not considered to be one the three states of matter?

    D. Mass

  • 19

    Which state of matter has a definite shape, a definite volume and cannot flow?

    B. Solid

  • 20

    Which one of the followig is not a property of liquids?

    D. They have no definite volume

  • 21

    Melting is the change in state of a

    A. Solid to a liquid

  • 22

    Which state of matter has no difinite shape and no definite volume?

    D. Gas

  • 23

    Which one of the following diagrams best repersents a model of the particles in a solid?

    A. 00000000000 00000000000 00000000000

  • 24

    Which one of the following is not a property of a solid?

    C. Definite coloro

  • 25

    What state of matter has a definite size and shape?

    B. Solid

  • 26

    What is and example of a solid?

    D. Pencil

  • 27

    What is an example of a liquid?

    C. Milk

  • 28

    What is states of matter

    D. Solid, liquid and gas

  • 29

    Gases have

    D. No definite shape or volume

  • 30

    Liquid have

    C. No difinite shpae but a definite volume

  • 31

    Solids have

    A. Definite shape and volume

  • 32

    The container of a gas determines it’s _____ and _____

    B. Shape and volume

  • 33

    When a solid change into liquid

    A. Melting

  • 34

    When a liquid change into a gas

    C. Vaporization

  • 35

    When a liquid chage into a solid?

    B. Freezing

  • 36

    The smallest part of an element that still has the properties of that element is called

    B. An atom

  • 37

    Which one of the following four statments is correct?

    D. Compounds always contain different types of atom

  • 38

    Which one of the following statments about compounds is correct?

    D. The elements in a compound are always present in the same ratio.

  • 39

    Natural gas is mainly methane(CH4). What two elements are found in methane?

    C, Carbon and hydrogen.

  • 40

    Which one of the following elements the symbol C?

    A. Carbon

  • 41

    One of the following substances is not an element. Which one is it?

    A. water

  • 42

    Study the diagrams representing elements, compounds and mixtures shown, and choose the correct statement from the following?

    C. X represents an element and W represents a mixture

  • 43

    A compound is a substance that

    D. I made up of two or more elements chemically joined together

  • 44

    This diagram represents

    A. A mixture

  • 45

    Which of the following represents the particles in a compound?

    A

  • 46

    Which one of the following diagrams repersents a mixture, an element and a compound

    D

  • 47

    The smallest part of a compound which still has the properties of that compound is called

    D. a molecule

  • 48

    A substance made up of only one type of atom is called

    B. an element

  • 49

    Which one of the following statements about mixtures is correct?

    A. A mixture must contain at least two different substances.

  • 50

    Which changes woth location?

    B. Weight

  • 51

    What is the weight measured in?

    B. Newons(N)

  • 52

    Wight =

    A. Mass(kg) x gravity(N/kg)

  • 53

    Which of the following is a physical property?

    A. Density

  • 54

    Which of the following tells you that a chemical change has occurred?

    C. Burning

  • 55

    Is wood burning a physical or chemical change?

    A. Chemical change

  • 56

    Who first used the term nanotechnology and when?

    B. Norio Taniguchi, 1974

  • 57

    10nm = ____m

    C 10^-9

  • 58

    The size of nanoparticles is between _____ nm

    C. 1 to 100

  • 59

    Carbon atoms make ____ type of bond with other carbon atoms

    A. covalent

  • 60

    1m = ____ nm

    C. 10^9

  • 61

    The diameter of human hair is ___ nm

    D. 100000

  • 62

    1 micrometer(micron) = _____ m

    D. 10^-6

  • 63

    1 micrometer(micron) = _____nm

    A. 1000

  • 64

    Which is the correct optical properties of gold nanomaterials

    A. Color of gold nanoparticles solution changes when particle size change.

  • 65

    Reactivity of nanomaterials.

    A. Higher than that of macro size materials.

  • 66

    Which is following correct?

    A. Person, apple, and ant are macro size materials.

  • 67

    Which is nanosize materials?

    D. DNA, cellulose nanofibrils, and hydrogen atoms

  • 68

    Which is following correct?

    A. Nanowhisker, silver nanoparticles, carbon nanotubes are nanomaterials

  • 69

    THe element sumbol for carbion is

    D. C

  • 70

    The naturally occurring allotrope of carbon is

    C. Diamond

  • 71

    All of the following are allotropes or froms of carbon except

    C. Sapphire

  • 72

    Which is following correct?

    D. Sumio Iijima found carbon nanotubes, 1991

  • 73

    The growth of CNTs via CVD method is occurred by five steps

    A. Condensation -> nucleation-> surface reaction-> migration-> desorption.

  • 74

    On the basic of sheets, CNTs can be classified to :On the basic of sheets, CNTs can be classified to :

    B. 3 types

  • 75

    The young’s modulus of CNTs is:

    A. Higher than stainless steel

  • 76

    What is graphene??

    B. A one-atom thick sheet of carbon