Chemical Composition Mini Quiz 1

Which of the following statements about the Periodic Table is not true?

• Oxygen is in Group 1.

• Elements are arranged in order of atomic number

• Elements in each group have similar properties

• There are more metals than non-metals

An element Z is in the same group as chlorine in the Periodic Table. Which one of the following is true about element Z?

• It is in Group 1.

• It is a non-metal.

• It has a very high melting point.

• It has high thermal conductivity.

Which of the following cannot be used to identify a suspension?

• Evaporating the mixture and looking for a residue.

• Filtering it and looking for a residue

• Letting it stand and looking for particles at the bottom

• Passing a light through it and looking to see if it passes through.

An old painting was accidentally sprayed with new paint! The solubilities of the old paint and new paint in different solvents are shown in this table.

Which solvent could be used to remove the new paint without damaging the original painting?

• solvent W

• solvent X

• solvent Y

• solvent Z

Which of the following is not true?

• Non-metallic elements are on the left side of the periodic table

• Matter is made out of atoms and molecules

• Compounds are made up of two more elements chemically combined

• The Periodic table consists of only elements

Which row represents the total number of elements and total number of atoms in each compound?

• A

• B

• C

• D

Which of the following sets contain an element, a mixture and a compound?

• hydrogen gas, sea water and air

• air, pure water and sodium chloride

• oxygen gas, air and carbon dioxide gas

• hydrogen gas, oxygen gas and pure water

Which of the following will affect the solubility of a solute in a solvent?

• type of solvent

• stirring the solution

• using a solute of different particle size

• shaking the beaker while solute is added

The graph shows a solubility curve of substance S.

500 g of substance S was added to 100 cm3 of water at 20 oC. How much of the substance will not be dissolved?

• 100 g

• 200 g

• 300 g

• 500 g

Which diagram represents a mixture of an element and a compound?

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