Q.1.
Which of the following activities contributes the most to carbon emissions globally?
Q.2.
What happens when air is heated?
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)
Q.4.
The amount of a substance that contains as many elementary entities (atoms, molecules, or other particles). It can be inferred to
Q.5.
True or False: All of the radiation from the Sun is absorbed by the Earth
Q.6.
Write the chemical formula of manganese(II) oxide
Q.7.
Write the chemical formula of copper(II) nitrate
Q.8.
What is greenhouse effect
Q.9.
What is the following formula of calcium carbonate?
Q.10.
What activity is increasing green house gases?
Q.11.
What does it mean with an atom that has a net positive or negative charge?
Q.12.
Which of the following molecules belong to polyatomic molecule?
Q.13.
Which are recyclable items?
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
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
Q.16.
True or False: Recycling is to turn old trash and make it into something new!
Q.17.
Does plastic melt ?
Q.18.
What term means "does not break down in the environment"
Q.19.
Close the tap is the way to save ......
Q.20.
How to keep fresh air?