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    				| 1. | 
                                    When a student added zinc granules to dilute HCI, a colourless and odourless gas was evolved, which was then tested with a burning match stick, what would be observed? | 
                            
| Answer» SOLUTION : When the colourless gas was TESTED with a burning matchstick, the matchstick extinguished and the gas burnt with a POP sound. This is because when zinc granules are added to silute HCI, HYDROGEN gas is EVOLVED. | |