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Q.1
Which of the following activities contributes the most to carbon emissions globally?
Deforestation
Agriculture
Burning fossil fuels
Respiration
Q.2
What happens when air is heated?
it rises
it decreases
no effect
Q.3
Methane (CHis the principal component of natural gas. How many moles of CH4 are present in 3.2 g of CH(molecular mass of CH4 isg/mol)
16
1.6
2
0.2
Q.4
The amount of a substance that contains as many elementary entities (atoms, molecules, or other particles). It can be inferred to
avogadro's number
mole
molar mass
average atomic mass
Q.5
True or False: All of the radiation from the Sun is absorbed by the Earth
True
False
Q.6
Write the chemical formula of manganese(II) oxide
MnO
Mn2O3
MnO2
Mn2O
Q.7
Write the chemical formula of copper(II) nitrate
CuNO3
CuNO2
Cu(NO3)2
Cu2NO3
Q.8
What is greenhouse effect
the process of reflecting the heat from the back to the outer space.
it is the process of trapping of heat from the sun by the greenhouse gases.
Q.9
What is the following formula of calcium carbonate?
KCO3
HCO3
CaCO3
CaCO2
Q.10
What activity is increasing green house gases?
Ocean and air currents
Volcanic activity
Plants activity
Human activity
Q.11
What does it mean with an atom that has a net positive or negative charge?
A molecule
An element
An ion
a matter
Q.12
Which of the following molecules belong to polyatomic molecule?
CO
HCl
O3
O2
Q.13
Which are recyclable items?
Used glass bottles
Plastics
Metal cans
All of the above
Q.14
Which of the following are sources of biomass to replace natural gas as the feedstock of many industrial processes? (Seaweed from large-scale farming (Waste paper from schools and offices (Methane gas from landfill sites
(1) and (2) only
(1) and (3) only
(2) and (3) only
(1), (2) and (3)
Q.15
Green chemistry is regarded as a reduction process. Which of the following aspects are the targets of reduction? (Cost of production (Use of catalyst (Risk and hazard
(1) and (2) only
(1) and (3) only
(2) and (3) only
(1), (2) and (3)
Q.16
True or False: Recycling is to turn old trash and make it into something new!
True
False
Q.17
Does plastic melt ?
no way
maybe
i don't know
yes
Q.18
What term means "does not break down in the environment"
biodegradeable
non-degradeable
corrosive
biodegenerative
Q.19
Close the tap is the way to save ......
Air
Water
Electric
Wind
Q.20
How to keep fresh air?
a. make more air pollution
b. produce more carbon dioxide
c. plant trees
d. pick up flowers in the garden
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