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CHEMISTRY UNIT TEST , 2021-22, SUBJECT - CLASS -IX MM : 20, , Q.1 From the knowledge of activity series, name a metal which shows the following, properties: [5], , 1. It reacts readily with cold water, , 2. It displaces hydrogen from hot water, , 3. It displaces hydrogen from dilute HCI, , 4. It forms a base which is insoluble in water., , 5. It does not displace hydrogen from dilute acids., , Q.2 Hydrogen is prepared by "Bosch Process" . [3], 1. Give it's equation with conditions, 2. How can you obtain hydrogen from a mixture of hydrogen and carbon monoxide., , Q.3 Name the following: [2], 1. Aggas that is oxidising as well as reducing agent, 2. An oxidising agent that does not contain oxygen, , Q.4 Give reasons: [5], 1. Hydrogen is collected by downward displacement of water and not of air, even though it, is lighter than air, 2. Oxidation and reduction must occur side by side in a chemical reaction., 3. Hot concentrated sulphuric acid not used not used in the preparation of hydrogen, 4. Purified and dried hydrogen is collected over mercury, 5. The end of thistle funnel should be dipped under acid., , Q.5) For the given equation: (5), Zn + Cu + Zn + Cu, , Write the oxidation and reduction half reactions for this reaction, Name the oxidising agent, , Name the substance oxidised, , Reducing agent, , ee