AQA C3 Chemistry

Question 1

True or False? "Each transition elements can only form one type of ion."

Accepted Answer

False

Question 2

A white precipitate formed when dilute HCl, then BaCl2 is added to a solution means...

Accepted Answer

...the solution contains sulphate ions.

Question 3

Carboxylic acids form ................ when dissolved in water.

Accepted Answer

very weak acids

Question 4

To break a chemical bond...

Accepted Answer

...energy must be supplied.

Question 5

Which of these can be used to measure the ΔE when a chemical reaction takes place?

Accepted Answer

change in temperature

Question 6

Compared to the pH of sulphuric acid, a carboxylic acid of the same concentration...

Accepted Answer

...has a higher pH.

Question 7

Elements in the same group of the Periodic Table have the same number of ...

Accepted Answer

...electrons in their outermost shell.

Question 8

Ethyl ethanoate is produced by reacting ethanol with...

Accepted Answer

...ethanoic acid.

Question 9

When doing a titration which of these could you use to determine the endpoint of the reaction?

Accepted Answer

indicator

Question 10

"Calorimetry can be used to measure the amount of energy in foods." True or False?

Accepted Answer

True

Question 11

When carbonates react with dilute acid they always produce...

Accepted Answer

...carbon dioxide.

Question 12

True or False? "Copper(II) ions form a white precipitate in a reaction with NaOH solution."

Accepted Answer

False

Question 13

A halogen will displace another halogen from an aqueous solution of its salt if it's...

Accepted Answer

...more reactive than the other halogen.

Question 14

True or False? "Esters are volatile compounds."

Accepted Answer

True

Question 15

In a flame test, which metal compounds burn to give a lilac flame?

Accepted Answer

K+

Question 16

Which of the following Group 1 elements is most reactive?

Accepted Answer

Cs+

Question 17

What is the functional group of a carboxylic acid?

Accepted Answer

-COOH

Question 18

True or False? "Transition metals and their compounds can't be used as catalysts."

Accepted Answer

False

Question 19

Which metal compounds form a green precipitate in a reaction with NaOH solution?

Accepted Answer

Fe2+

Question 20

Which of these scientists was the first to suggest ordering elements by their atomic mass?

Accepted Answer

Newlands

Question 21

In a flame test, which metal compounds burn to give a yellow flame?

Accepted Answer

calcium compounds

Question 22

What can be added to remove permanent water hardness?

Accepted Answer

sodium chloride crystals, brine solution

Question 23

True or False? "Fluoride is added to drinking water because it helps improve dental health."

Accepted Answer

True

Question 24

The concentration of a solution is always measured in ...

Accepted Answer

mol / dm3

Question 25

Grams per dm3 is a measure of...

Accepted Answer

concentration

Question 26

What solutions are needed to test for sulphate ions?

Accepted Answer

dilute HCl and barium chloride

Question 27

True or False? "The elements in Group 1 are all metals with high density."

Accepted Answer

False

Question 28

The further.................. Group 7 you go, the ............... reactive the elements get.

Accepted Answer

....up....less, ...down....more

Question 29

What type of molecule is this?

Accepted Answer

alcohol

Question 30

True or False? "Esters don't have a smell."

Accepted Answer

False

Question 31

What type of reaction does this show?

Accepted Answer

exothermic reaction

Question 32

Which of these ions forms a white precipitate in a reaction with NaOH solution?

Accepted Answer

calcium ions

Question 33

Which of these will not remove temporary hardness in water?

Accepted Answer

adding calcium chloride

Question 34

Which of the following metal ions does not form a white precipitate in a reaction with NaOH?

Accepted Answer

iron (II) ions

Question 35

In an exothermic reaction, the products are...

Accepted Answer

at a lower energy than the reactants

Question 36

In an endothermic reaction, the energy released when bonds formed is...

Accepted Answer

...less than the energy used in breaking bonds.

Question 37

In a gaseous reversible reaction, increasing the pressure will promote the reaction that...

Accepted Answer

...produces fewer molecules of gas.

Question 38

Carboxylic acids react with carbonates to produce...

Accepted Answer

...carbon dioxide.

Question 39

Which equation shows the reaction of hydrogen in a combustion engine?

Accepted Answer

hydrogen + oxygen → water, 2H2 + O2 → 2H2O

Question 40

When the Periodic Table was first developed scientists...

Accepted Answer

...completely changed how they approached chemistry.

Question 41

Chlorine is added to drinking water to...

Accepted Answer

...remove solid matter., ...kill microbes.

Question 42

Which of the following is an ester?

Accepted Answer

methyl propanoate

Question 43

Titration is an analytical technique that allows you to find out...

Accepted Answer

...how much alkali is needed to neutralise a volume of acid., ...how much acid is needed to neutralise a volume of alkali.

Question 44

After electrons, protons and neutrons were discovered, elements on the Periodic Table were...

Accepted Answer

...arranged in order of atomic number.

Question 45

Why were the early versions of the Periodic Table incomplete?

Accepted Answer

Some elements had not been discovered yet.

Question 46

What colour is silver iodide?

Accepted Answer

yellow

Question 47

To test for halide ions, first add dilute HNO3, followed by...

Accepted Answer

...silver nitrate solution.

Question 48

When ethanol is oxidised, it produces...

Accepted Answer

...ethanoic acid.

Question 49

Which of the of the following is a unit for energy?

Accepted Answer

Joules

Question 50

Calorimetry can be used to measure the energy given off when a substance burns.

Accepted Answer

True

Question 51

What can be done to reduce the activation energy (Ea) of a reaction?

Accepted Answer

add a catalyst

Question 52

When hard water is heated, it can create...

Accepted Answer

...scale.

Question 53

In a flame test, which metal compounds burn to give a green flame?

Accepted Answer

barium

Question 54

When alkali metals react with non-metals...

Accepted Answer

...ionic bonds form.

Question 55

..................... can be burned in a fuel cell.

Accepted Answer

H2

Question 56

Increasing the temp of a reversible rxn will increase the yield of the exothermic reaction.

Accepted Answer

False

Question 57

Limewater is used to test for...

Accepted Answer

...carbon dioxide.

Question 58

How is ammonia removed during the Haber process?

Accepted Answer

By cooling to liquefy it.

Question 59

Which of these isn't a raw material used in the Haber process?

Accepted Answer

oxygen, Fe

Question 60

When propanol reacts with sodium, ................ is given off.

Accepted Answer

hydrogen

Question 61

Temporary hardness in water is caused by...

Accepted Answer

...hydrogencarbonate ions.

Question 62

Energy is needed in a chemical reaction to...

Accepted Answer

...break bonds.

Question 63

Transition metals are...

Accepted Answer

...much less reactive than Group 1 metals.

Question 64

Methanol dissolves in water to form a...

Accepted Answer

...neutral solution.

AQA C3 Chemistry

Questions 71

AQA C3 Chemistry

Questions 71