GCSE revision Year 11

Poslední aktualizace 2 months ago

25 Dotazy

The student does two experiments.

He uses different sized pieces of calcium carbonate for each experiment.

The rate of reaction is greater in the first experiment.

These statements explain how scientists think our modern-day atmosphere was formed.

A student reacts some metals with different salt solutions and records her results.

She places a tick (✓) in her results table if she sees a chemical change and a cross (✗) if there is no reaction. Some of the boxes are blanked out.

A condensation polymer is made from two monomers.

One monomer has two –$OH$ groups in its molecule.
The other monomer has two –$COOH$ groups in its molecule.

The bar chart shows the amount of some fractions made from 100 tonnes of crude oil by fractional distillation. It also shows the amount of each fraction needed for everyday uses.

$Bar chart showing the amount made versus needed for crude oil fractions: gases, petrol, naphtha, paraffin, gas oil, and fuel oil.$

A student investigates the reaction between calcium carbonate and hydrochloric acid.

He measures the total volume of gas made every minute.

Look at the graph. It shows his results for the experiment.

Graph showing the volume of gas produced over time in minutes. The volume increases and levels off at around 50 cm³ after 4 minutes.

A student reacts some metals with different salt solutions and records her results.

She places a tick (✓) in her results table if she sees a chemical change and a cross (✗) if there is no reaction.

Chemical structures labeled X and Y. Structure X shows an ethanol molecule (CH3CH2OH), and structure Y shows an acetic acid molecule (CH3COOH).

GCSE revision Year 11

Poslední aktualizace 2 months ago

25 Dotazy

What is the rate of reaction between 0 and 2 minutes, in $cm^3$/minute?

7.5

A student investigates the reaction between $1.0 \, \text{g}$ of calcium carbonate and $20 \, \text{cm}^3$ of $1.0 \, \text{mol/dm}^3$ hydrochloric acid at $25 ^\circ \text{C}$.

The student does two experiments.

He uses different sized pieces of calcium carbonate for each experiment.

The rate of reaction is greater in the first experiment.

Which is the best explanation for this result?

Large pieces of calcium carbonate have a larger surface area resulting in less frequent collisions.

Large pieces of calcium carbonate have a smaller surface area resulting in more frequent collisions.

Small pieces of calcium carbonate have a larger surface area resulting in less frequent collisions.

Small pieces of calcium carbonate have a larger surface area resulting in more frequent collisions.

These statements explain how scientists think our modern-day atmosphere was formed.

What is the correct order that these events happened?

1, 4, 2, 5, 3

2, 4, 5, 3, 1

4, 1, 5, 2, 3

4, 2, 5, 1, 3

A student bubbles ethene gas into bromine water.
Which displayed formula shows the product of this reaction?

Chemical structure of an alkene with each carbon atom bonded to a bromine and a hydrogen atom.

Chemical structure of an alkane with each carbon atom bonded to a bromine and two hydrogen atoms.

Chemical structure of an alkene with one carbon atom bonded to two hydrogens and the other bonded to a bromine and hydrogen.

Chemical structure of an alkane with one carbon atom bonded to two bromines and the other bonded to two hydrogens.

Which procedure is the most suitable for preparing a 0.10 mol/dm³ solution of sodium carbonate?
The relative formula mass, $M_r$, of sodium carbonate is 106.

Dissolving 10.6 g of sodium carbonate in water to make 1.0 dm³ of solution.

Dissolving 10.6 g of sodium carbonate in 0.10 dm³ of water.

Dissolving 10.6 g of sodium carbonate in 1.0 dm³ of water.

Dissolving 106 g of sodium carbonate in water to make 1.0 dm³ of solution.

A student reacts some metals with different salt solutions and records her results.

She places a tick (✓) in her results table if she sees a chemical change and a cross (✗) if there is no reaction. Some of the boxes are blanked out.

	Magnesium chloride	Silver nitrate	Copper(II) sulfate	Iron(II) sulfate
Magnesium	✓	✓	✓
Silver	✗		✗	✗
Copper	✗	✓		✗
Iron	✗	✓	✓

Which metal has the least tendency to form a positive ion?

copper

iron

magnesium

silver

A student heats compound X with acidified potassium manganate(VII) solution. The product of the reaction is compound Y. Chemical structures labeled X and Y. Structure X shows a molecule with two carbon atoms bonded to hydrogen atoms and a single oxygen atom (an alcohol group). Structure Y shows a molecule with a carbon atom double bonded to an oxygen atom and single bonded to another oxygen atom with a hydrogen (a carboxylic acid group).

What is the colour change seen during this reaction?

colourless to orange

colourless to purple

orange to colourless

purple to colourless

A condensation polymer is made from two monomers.

One monomer has two –$OH$ groups in its molecule.
The other monomer has two –$COOH$ groups in its molecule.

Which term describes the polymer?

DNA

polyamide

poly(chloroethene)

polyester

Which statement is correct for a Group 1 element?

It dissolves in water to form a bleach.

It is an inert gas.

It is a non-metal.

It reacts with water to form hydrogen.

The bar chart shows the amount of some fractions made from 100 tonnes of crude oil by fractional distillation. It also shows the amount of each fraction needed for everyday uses.

$Bar chart showing the amount made versus needed for crude oil fractions: gases, petrol, naphtha, paraffin, gas oil, and fuel oil.$

Cracking converts large molecules into smaller more useful molecules to make the supply match the demand. Which fractions are most likely to be cracked to make the supply match the demand?

gas oil and fuel oil

gas oil and petrol

naphtha, paraffin and fuel oil

petrol and gases

Urea, $(\text{NH}_2)_2\text{CO}$, is a fertiliser.
A student makes 1 mole of urea from 2 moles of ammonia.
What is the mass of urea that the student makes?

43.0 g

44.0 g

58.0 g

60.0 g

A student is testing sodium carbonate solution.
She adds barium chloride solution followed by excess dilute hydrochloric acid.
Which of these observations would not be seen?

colourless solution at the end

gas bubbles when the dilute acid is added

white precipitate formed when the barium chloride solution is added

white precipitate formed when the dilute acid is added

A student is making a fertiliser called potassium nitrate, $KNO_3$. Look at the equation for the reaction she uses. $KOH + HNO_3 \rightarrow KNO_3 + H_2O$ The relative formula masses, $M_r$, of each compound are shown in the table.

Compound	Formula	Relative formula mass
potassium hydroxide	$KOH$	56.1
nitric acid	$HNO_3$	63.0
potassium nitrate	$KNO_3$	101.1
water	$H_2O$	18.0

What is the atom economy for the reaction to make potassium nitrate? Assume that water is a waste product.

15.1%

47.1%

52.9%

84.9%

Which displayed formula includes the functional group of an alcohol?

Chemical structure of an alcohol with a hydrocarbon chain.

Chemical structure of a hydrocarbon chain with a double bond.

Chemical structure of an alcohol with a hydrocarbon chain.

Chemical structure of a carboxylic acid with a hydrocarbon chain.

Zinc nitrate thermally decomposes to give two gases.
$2Zn(NO_3)_2(s) \rightarrow 2ZnO(s) + 4NO_2(g) + O_2(g)$
A student heats 1.89 g of zinc nitrate until there is no further reaction.
What is the total volume of gas measured at room temperature and pressure, made in this reaction?
Assume that one mole of gas occupies a volume of 24 $dm^3$ at room temperature and pressure.
The molar mass of zinc nitrate is 189 g/mol.

0.12 $dm^3$

0.48 $dm^3$

0.60 $dm^3$

1.20 $dm^3$

A student investigates the reaction between calcium carbonate and hydrochloric acid.

He measures the total volume of gas made every minute.

Look at the graph. It shows his results for the experiment.

Graph showing the volume of gas produced over time in minutes. The volume increases and levels off at around 50 cm³ after 4 minutes.

What is the rate of reaction between 0 and 2 minutes, in $cm^3/\text{minute}$?

7.5

A student investigates the reaction between 1.0 g of calcium carbonate and 20 cm³ of 1.0 mol/dm³ hydrochloric acid at 25 °C. The student does two experiments.
He uses different sized pieces of calcium carbonate for each experiment.
The rate of reaction is greater in the first experiment.
Which is the best explanation for this result?

Large pieces of calcium carbonate have a larger surface area resulting in less frequent collisions.

Large pieces of calcium carbonate have a smaller surface area resulting in more frequent collisions.

Small pieces of calcium carbonate have a larger surface area resulting in less frequent collisions.

Small pieces of calcium carbonate have a larger surface area resulting in more frequent collisions.

These statements explain how scientists think our modern-day atmosphere was formed.
Plants evolved and used carbon dioxide during photosynthesis to make oxygen.
As the Earth cooled down, water fell as rain resulting in the formation of the oceans.
The atmosphere today consists of nitrogen, oxygen and a small amount of carbon dioxide.
Volcanoes gave out ammonia and carbon dioxide as well as methane and water vapour.
Ammonia was changed by bacteria in the soil into nitrogen gas.
What is the correct order that these events happened?

1, 4, 2, 5, 3

2, 4, 5, 3, 1

4, 1, 5, 2, 3

4, 2, 5, 1, 3

A student bubbles ethene gas into bromine water. Which displayed formula shows the product of this reaction?

Chemical structure with double bonded carbons and bromine atoms on both carbons.

Chemical structure with single bonded carbons and bromine atoms on both carbons.

Chemical structure with double bonded carbons and bromine atom on one carbon.

Chemical structure with single bonded carbons and two bromine atoms on one carbon.

Which procedure is the most suitable for preparing a $0.10 \, \text{mol/dm}^3$ solution of sodium carbonate?
The relative formula mass, $M_r$, of sodium carbonate is 106.

Dissolving 10.6 g of sodium carbonate in water to make $1.0 \, \text{dm}^3$ of solution.

Dissolving 10.6 g of sodium carbonate in $0.10 \, \text{dm}^3$ of water.

Dissolving 10.6 g of sodium carbonate in $1.0 \, \text{dm}^3$ of water.

Dissolving 106 g of sodium carbonate in water to make $1.0 \, \text{dm}^3$ of solution.

A student reacts some metals with different salt solutions and records her results.

She places a tick (✓) in her results table if she sees a chemical change and a cross (✗) if there is no reaction.

The results table is as follows:

	Magnesium chloride	Silver nitrate	Copper(II) sulfate	Iron(II) sulfate
Magnesium		✓	✓	✓
Silver	✗		✗	✗
Copper	✗	✓		✗
Iron	✗	✓	✓

Which metal has the least tendency to form a positive ion?

copper

iron

magnesium

silver

Your answer:

A student heats compound X with acidified potassium manganate($VII$) solution. The product of the reaction is compound Y. What is the colour change seen during this reaction?

colourless to orange

colourless to purple

orange to colourless

purple to colourless

Chemical structures labeled X and Y. Structure X shows an ethanol molecule (CH3CH2OH), and structure Y shows an acetic acid molecule (CH3COOH).

A condensation polymer is made from two monomers. One monomer has two $-OH$ groups in its molecule. The other monomer has two $-COOH$ groups in its molecule. Which term describes the polymer?

DNA

polyamide

poly(chloroethene)

polyester

GCSE revision Year 11

GCSE revision Year 11

What is the rate of reaction between 0 and 2 minutes, in $cm^3$/minute?

Which is the best explanation for this result?

What is the correct order that these events happened?

A student bubbles ethene gas into bromine water.Which displayed formula shows the product of this reaction?

Which procedure is the most suitable for preparing a 0.10 mol/dm3 solution of sodium carbonate?The relative formula mass, $M_r$, of sodium carbonate is 106.

Which metal has the least tendency to form a positive ion?

What is the colour change seen during this reaction?

Which term describes the polymer?

Which statement is correct for a Group 1 element?

Cracking converts large molecules into smaller more useful molecules to make the supply match the demand. Which fractions are most likely to be cracked to make the supply match the demand?

Urea, $(\text{NH}_2)_2\text{CO}$, is a fertiliser.A student makes 1 mole of urea from 2 moles of ammonia.What is the mass of urea that the student makes?

A student is testing sodium carbonate solution.She adds barium chloride solution followed by excess dilute hydrochloric acid.Which of these observations would not be seen?

What is the atom economy for the reaction to make potassium nitrate? Assume that water is a waste product.

Which displayed formula includes the functional group of an alcohol?

What is the rate of reaction between 0 and 2 minutes, in $cm^3/\text{minute}$?

A student bubbles ethene gas into bromine water. Which displayed formula shows the product of this reaction?

Which procedure is the most suitable for preparing a $0.10 \, \text{mol/dm}^3$ solution of sodium carbonate?The relative formula mass, $M_r$, of sodium carbonate is 106.

Which metal has the least tendency to form a positive ion?

Your answer:

A student heats compound X with acidified potassium manganate($VII$) solution. The product of the reaction is compound Y. What is the colour change seen during this reaction?

A condensation polymer is made from two monomers. One monomer has two $-OH$ groups in its molecule. The other monomer has two $-COOH$ groups in its molecule. Which term describes the polymer?

What is the rate of reaction between 0 and 2 minutes, in $cm^3$/minute?

Which is the best explanation for this result?

What is the correct order that these events happened?

A student bubbles ethene gas into bromine water.Which displayed formula shows the product of this reaction?

Which procedure is the most suitable for preparing a 0.10 mol/dm3 solution of sodium carbonate?The relative formula mass, $M_r$, of sodium carbonate is 106.

Which metal has the least tendency to form a positive ion?

What is the colour change seen during this reaction?

Which term describes the polymer?

Which statement is correct for a Group 1 element?

Cracking converts large molecules into smaller more useful molecules to make the supply match the demand. Which fractions are most likely to be cracked to make the supply match the demand?

Urea, $(\text{NH}_2)_2\text{CO}$, is a fertiliser.A student makes 1 mole of urea from 2 moles of ammonia.What is the mass of urea that the student makes?

A student is testing sodium carbonate solution.She adds barium chloride solution followed by excess dilute hydrochloric acid.Which of these observations would not be seen?

What is the atom economy for the reaction to make potassium nitrate? Assume that water is a waste product.

Which displayed formula includes the functional group of an alcohol?

What is the rate of reaction between 0 and 2 minutes, in $cm^3/\text{minute}$?

A student bubbles ethene gas into bromine water. Which displayed formula shows the product of this reaction?

Which procedure is the most suitable for preparing a $0.10 \, \text{mol/dm}^3$ solution of sodium carbonate?The relative formula mass, $M_r$, of sodium carbonate is 106.

Which metal has the least tendency to form a positive ion?

Your answer:

A student heats compound X with acidified potassium manganate($VII$) solution. The product of the reaction is compound Y. What is the colour change seen during this reaction?

A condensation polymer is made from two monomers. One monomer has two $-OH$ groups in its molecule. The other monomer has two $-COOH$ groups in its molecule. Which term describes the polymer?

A student bubbles ethene gas into bromine water.
Which displayed formula shows the product of this reaction?

Which procedure is the most suitable for preparing a 0.10 mol/dm³ solution of sodium carbonate?
The relative formula mass, $M_r$, of sodium carbonate is 106.

Urea, $(\text{NH}_2)_2\text{CO}$, is a fertiliser.
A student makes 1 mole of urea from 2 moles of ammonia.
What is the mass of urea that the student makes?

A student is testing sodium carbonate solution.
She adds barium chloride solution followed by excess dilute hydrochloric acid.
Which of these observations would not be seen?

Which procedure is the most suitable for preparing a $0.10 \, \text{mol/dm}^3$ solution of sodium carbonate?
The relative formula mass, $M_r$, of sodium carbonate is 106.

A student bubbles ethene gas into bromine water.
Which displayed formula shows the product of this reaction?

Which procedure is the most suitable for preparing a 0.10 mol/dm³ solution of sodium carbonate?
The relative formula mass, $M_r$, of sodium carbonate is 106.

Urea, $(\text{NH}_2)_2\text{CO}$, is a fertiliser.
A student makes 1 mole of urea from 2 moles of ammonia.
What is the mass of urea that the student makes?

A student is testing sodium carbonate solution.
She adds barium chloride solution followed by excess dilute hydrochloric acid.
Which of these observations would not be seen?

Which procedure is the most suitable for preparing a $0.10 \, \text{mol/dm}^3$ solution of sodium carbonate?
The relative formula mass, $M_r$, of sodium carbonate is 106.