Incorrect Questions On Seneca Flashcards
What are the steps of Chromatography?
- A spot of the solution to be separated is placed near the bottom of chromatography paper
- The paper is held upright, the bottom of the paper is dipped in a suitable solvent
- As the solvent soaks up the paper, it carries the solutes in the spot with it. The different solutes in the spot of solution move at different speeds
- This leaves a pattern of the seperate solutes on the chromatography paper
What can we say if the RF value of a reference and a spot match all the solvents?
It,s very likely that the mixture contains the reference compound
What do we call a pure sample that’s run next to the tested substance to see if it’s a component in the mixture?
Reference substance
The apparatus required when testing for hydrogen
Test tube
Lit splint
What type of litmus paper will NOT change colour in acidic or neutral solutions?
Red litmus paper
Which of these is a mixture? Carbon dioxide Beer Water Table salt
Beer
How many more electrons can fit in the 2nd electron shell compared to the 1st?
6
What type of microscope can we use to see the outline of atoms?
Electron microscope
Which of the following are examples of compounds? Water Orange juice Plastic Carbon dioxide Hydrogen Oxygen
Water
Plastic
Carbon dioxide
What state are particles which are not touching and are always moving most likely to be in?
Gas
Which are true of boiling and evaporation?
Both change from gas to solid
In boiling all particles have the energy to turn into a gas
In evaportation no particles have the energy to turn into a gas
Both are a change from liquid to gas
Water boils at 10OC
In boiling all particles have the energy to turn into a gas
Both are a change from liquid to gas
Which state will change shape to fill a container, but will not expand?
Liquid
How many elements on the periodic table occur naturally?
90
Which word fits better than “dull”?
Malleable
How many metals are on the periodic table?
91
Which of these is NOT a form of carbon? Coal Graphite Wood Diamond
Wood
Why are alkali metals stored in oil?
They react with oxygen in the air
The Equation for Non-Metal Oxide Formation
Non-metal+ ? = non-metal oxide
Oxygen