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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