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WorksheetsDAY 9 PRETEST (CHEMISTRY)
Total questions: 10
Worksheet time: 3mins
How many particles are contained in 1 mole of Table salt, NaCl?
6.022 x 1023
6.023 x 1022
6.22 x 1023
6.23 x 1022
How many moles are present in 2.45 x 1023 molecules of CH4?
14.75 moles
1 mole
0.5 mole
0.41 mole
How many moles are in a container that holds 1000 grams of water?
1.00 mole
18.00 moles
55.56 moles
1000 moles
How can the knowledge about mole be useful for environmentalists?
Mole concept can be used in environmental monitoring.
It gives information on the most dangerous pollutant in the atmosphere.
It gives a feedback on the kinds of pollutants present in the atmosphere.
Mole concept can be used in quantifying the number of pollutant-particles released in the atmosphere.
Which of the following steps to solve a problem must be completed first?
analyzing data
recognizing and identifying the problem
forming a hypothesis
testing a hypothesis
An experiment is performed on mice to see how different liquids affect their growth. Each mouse in the experiment is given a different liquid; water, apple juice, or milk. Each mouse has the same amount of food, same environment, and the same amount of light. In this investigation, what is the INDEPENDENT VARIABLE?
Type of mouse
Different liquids
Mice growth
Amount of sunlight
In an experiment, the group that is not changed or tested and is used as a benchmark to measure how the other groups changed.
controlled variable
independent variable
dependent variable
both A and B
Given the following elements:
I – carbon
II – hydrogen
III – oxygen
IV – nitrogen
Which of these given elements is/are present in an alcohol compound?
I and II
II and III
I, II, and III
I, II, III and IV
Which of the given functional groups represents a KETONE?
R-X
R-CO-R
R-OH
R-COOH
Which of the following is/are the reasons why carbon is a unique element?
I - It has the ability to form four bonds
II – It can combine with other elements and with itself
III – It forms limited number of bonds with other elements
IV – It can combine with other elements to form single, double and triple bonds
I, II, and III
II, III, IV
I, II, IV
I, II, III
