Particulate nature of matter
Which gas has the smallest rate of diffusion?
- Amethane
- Bammonia
- Ccarbon dioxide
- Dhydrogen chloride
Drops of bromine liquid were placed at the bottom of a glass jar as shown in the diagram. After several hours the vapour spread to fill both jars uniformly as shown in the second diagram.
Which action will speed up the process
Ammonia gas recats with dilute hydrochloric acid as shown in the equation:
NH3(g) + HCl(aq) -> NH4Cl(aq).
What mass of ammonium chloride is formed if 8.5 g of ammonia gas is used?
The pH values of four solutions, W, X, Y and Z, are shown in the table.
| solution | pH |
|---|---|
| W | 3 |
| X | 5 |
| Y | 7 |
| Z | 11 |
Which solution can be used to neutralize an acidic soil?
The diagram shows the positions of four elements in the periodic table represented by the letters W, X, Y and Z.
Which element, W, X, Y or Z forms an acidic oxide?
A hydrocarbon, X, can crack as shown
X --heat--> C2H4 + C8H18
What could be X?
An organic compound Q reacted with one mole of hydrogen in the presence of a catalyst.
What could be Q?
The graph was drawn from data obtained by heating water from -15 degrees C to 100 degrees C.
In which section of the graph is a mixture of ice and liquid water found?
The apparatus shown was used to investigate the rate of diffusion of ammonia gas and hydrogen chloride. A white ring was observed after a few minutes.
At which point was the white ring observed?
The diagram shows an electrochemical cell, with a zinc electrode and a copper electrode dipping into sodium chloride solution and joined through a voltmeter and a switch.
What is observed when the switch is closed?
The diagram shows energy changes for a chemical reaction, with the reactants at a higher energy level than the products.
Which statement is not correct about the reaction?
A mass of 13.80 g of a mineral ore of copper was analysed. The results are shown in the table.
| element | copper | iron | sulphur |
|---|---|---|---|
| mass/g | 4.80 | 4.20 | 4.80 |
The empirical formula of the ore is
The diagram shows a pot chlorinator for treatment of drinking water in a tank. The pot holds a layer of small stones at the top, bleaching powder and sand below it, and gravel and small stones at the bottom, with holes at the bottom of the pot.
How is the water treated in the pot chlorinator?
The diagram shows the interconversion of water to its three different states, with the changes numbered 1 to 6: 1 is water to ice, 2 is water to steam, 3 is steam to ice, 4 is ice to water, 5 is steam to water and 6 is ice to steam.
In which conversions will the water molecules lose speed?
The diagram shows a chromatogram of different inks.
Which statement about the chromatogram is not true?
One molecule of a compound, ZY3, is shown in a dot-and-cross diagram.
The elements represented by Z and Y could be
The equation shows the formation of sulphur trioxide in the contact process.
2SO2(g) + O2(g) <=> 2SO3(g)
Which statement is true about this equation?
Graph X shows the result obtained from the reaction of 10 cm3 of 1 mol/dm3 hydrochloric acid and 10 g of powdered zinc.
Curve Y was obtained when one of the reaction conditions was changed.
Which change produced curve Y?
A solution of silver nitrate was placed in four different test tubes and subjected to different tests as shown in the diagram. Damp red litmus paper is held over each tube and each tube is heated. Tube A holds the solution with NaOH, tube B the solution with NaOH and aluminium foil, tube C the solution only, and tube D the solution with aluminium foil.
In which test tube will the red litmus paper change to blue?
Sit the paper here to see which ones you got right. Danho explains every question, keeps your score, and works without a connection.