Yr10 Mock

Question 1

Why did you choose your answer to 1b?

Answer 1

It has the fewest tropic levels which means less energy is lost through excretion and respiration therefore more energy is passed on to the human

Question 2

What is the answer to 1b?

Answer 2

C

Question 3

What was the drug thalidomide originally developed to treat?

Answer 3

As a sleeping pill

Question 4

Soon after it was developed, thalidomide was found to be useful in treating another condition. What was this condition?

Answer 4

Morning sickness in pregnant women

Question 5

Describe one harmful effect of thalidomide

Answer 5

Limb defects

Question 6

Suggest why this harmful effect had not been detected during clinical drug trials on thalidomide.

Answer 6

The drug was not tested in pregnant women

Question 7

What happens in the body to make someone become dependant on a drug?

Answer 7

Changes to their chemical processes

Question 8

Evidence in figure 4?

Answer 8

dependency on some legal drugs is more than or equal to on some illegal drugs, for example nicotine has a higher increasing dependency than class A drug ecstasy

Question 9

Suggest one other piece of information about legal drugs that would need to be considered before the classification of these drugs was changed.

Answer 9

It’s effect on health

Question 10

Hydrogen + oxygen —> ?

Answer 10

Water vapour

Question 11

What is the electronic structure of a carbon atom?

Answer 11

2,4

Question 12

What impact does coal have on the environment?

Answer 12

Carbon dioxide (global warming) and soot (global dimming)

Question 13

Limestone contains calcium carbonate (CaCO3). Name the type of reaction that takes place when calcium carbonate is heated strongly. Name the products formed.

Answer 13

Thermal decomposition produces calcium oxide and carbon dioxide

Question 14

What is the mean loss of table 3?

Answer 14

1. 8+1.7+1.9=5.4

5. 4/3=1.8g

Question 15

Suggest and explain two reasons why the mean mass lost in the experiments to heat limestone is less than 2.2 g.

Answer 15

The limestone contained impurities so less carbon dioxide was produced or the temperature was not high enough so the limestone didn’t fully decompose

Question 16

Name the two types of hydrocarbon

Answer 16

Alkene and alkane

Question 17

Describe the conditions in the reactor

Answer 17

High temperature and cataylsts

Question 18

why air must not enter the reactor?

Answer 18

The oxygen might react with the hydrocarbons

Question 19

Suggest a method that can be used to separate butene from the other hydrocarbons.

Answer 19

Fractional distillation

Question 20

Describe how molecules of butene form poly(butene).

Answer 20

Many butane molecules form chains

Question 21

Draw the structure of butene

Answer 21

H   H H H
 |    |   |    |
C=C-C-C-H
|         |   |
H      H  H

Question 22

How do animals and plants survive in hot climates?

Answer 22

Camels have large surface area to increase heat loss by radiation, hump with fat stores fat in hump can be converted to water via respiration, long eyelashes to keep windblown dust out of eyes, large flat feet to stop sinking, thick fur on top to protect from sun and thin fur elsewhere to allow easy heat loss and can tolerate body temperatures of up to 42 degrees.

Cacti decrease in surface area such as leaves are spikes thick wax reduced area reduces water loss protect from predators, extensive roots to absorb more water and fleshy / thick stem to store water