Incorrect Questions On Seneca

Question 1

What are the steps of Chromatography?

Answer 1

1. A spot of the solution to be separated is placed near the bottom of chromatography paper
2. The paper is held upright, the bottom of the paper is dipped in a suitable solvent
3. 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
4. This leaves a pattern of the seperate solutes on the chromatography paper

Question 2

What can we say if the RF value of a reference and a spot match all the solvents?

Answer 2

It,s very likely that the mixture contains the reference compound

Question 3

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?

Answer 3

Reference substance

Question 4

The apparatus required when testing for hydrogen

Answer 4

Test tube

Lit splint

Question 5

What type of litmus paper will NOT change colour in acidic or neutral solutions?

Answer 5

Red litmus paper

Question 6

Which of these is a mixture?
Carbon dioxide
Beer
Water
Table salt

Answer 6

Beer

Question 7

How many more electrons can fit in the 2nd electron shell compared to the 1st?

Answer 7

6

Question 8

What type of microscope can we use to see the outline of atoms?

Answer 8

Electron microscope

Question 9

Which of the following are examples of compounds?
Water
Orange juice
Plastic
Carbon dioxide
Hydrogen
Oxygen

Answer 9

Water
Plastic
Carbon dioxide

Question 10

What state are particles which are not touching and are always moving most likely to be in?

Answer 10

Gas

Question 11

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

Answer 11

In boiling all particles have the energy to turn into a gas

Both are a change from liquid to gas

Question 12

Which state will change shape to fill a container, but will not expand?

Answer 12

Liquid

Question 13

How many elements on the periodic table occur naturally?

Answer 13

90

Question 14

Which word fits better than “dull”?

Answer 14

Malleable

Question 15

How many metals are on the periodic table?

Answer 15

91

Question 16

Which of these is NOT a form of carbon?
Coal
Graphite
Wood
Diamond

Answer 16

Wood

Question 17

Why are alkali metals stored in oil?

Answer 17

They react with oxygen in the air

Question 18

The Equation for Non-Metal Oxide Formation

Non-metal+ ? = non-metal oxide

Answer 18

Oxygen