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