This Exercise requires GRAPH PAPER!
Click the QR code for MC Questions. Written questions, use your jotter, date & heading: ExN5 S3_3AA Recap, in your jotter. |
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| 1. | |
| Matthew wanted to find out which type of marble would produce 20ml of gas the fastest when added to sulphuric acid | |
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| The time taken to produce the quantity of gas is shown in the table below. | |
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| a) | Which type of marble would be the slowest to produce the 20ml of gas? |
| b) | Suggest the time that the flaked and lump chips would take to produce 20ml of gas |
| c) | If 4g of powdered marble was used instead of 2g, how long would the gas have taken to produce? |
| 2. | |
| A pupil adds a lump of chalk to a beaker of acid, which reacts giving off a gas. What difference would she have expected to see if they had used powdered chalk instead of a lump? | |
| 3. | |
| What happens in all chemical reactions? | |
| 4. | |
| An enquiring scientist found three gas jars with sealed lids. He remembered they contained three different gases, but the labels had fallen off. | |
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| The gas in jar A relit a glowing splint. The gas in jar B put out a burning taper with a pop. The gas in jar C turned limewater milky. |
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| Identify the three gases, A, B and C. | |
| 5. | |
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