G9 Lesson 1
Quiz by Dina Ali
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25 questions
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- Q1When copper hydroxide is heated, we obtain ..........copper and hydrogen.copper oxide and water.copper oxide and hydrogen.copper carbonate and water.30s
- Q2On heating copper carbonate, the colour changes from ..........blue to black.green to black.green to blue.black to green.30s
- Q3Most metal sulphates decompose when they are heated to metal oxide and .......... gas.SO₃SO₂CO₂O₂30s
- Q4Some metal nitrates are decomposed by heat into ..........metal nitrate and water.nitrogen oxide and oxygen gas.metal nitrate and oxygen gas.metal nitrite and oxygen gas.30s
- Q5The oxygen (O₂) evolves by heating .......... compound.Cu(OH)₂NaNO₃CuCO₃CuSO₄30s
- Q6Carbon dioxide evolves during thermal decomposition of .......... compound.Cu(OH)₂HgOCuSO₄CuCO₃30s
- Q7All of the following compounds give black precipitate on heating except ..........CuSO₄Cu(OH)₂HgOCuCO₃30s
- Q8From the compounds which decompose by heat into metal and oxygen is ..........Cu(OH)₂HgOCuSO₄CuCO₃30s
- Q9When there is a sudden decrease in the car speed, the sodium azide is decomposed into .......... gas.N₂O₂CO₂H₂30s
- Q10Substitution reactions take place on replacing ..........less active element with more active one.more active element with less active one.more active compound with less active element.less active compound with more active element.30s
- Q11Active metals react with water as they substitute hydrogen of water forming .......... and hydrogen gas evolves.metal nitritemetal oxidemetal nitratemetal hydroxide30s
- Q12All of the following metals replace hydrogen of the acid except ..........AuAlSnZn30s
- Q13Aluminium practically lates in its reaction with hydrochloric acid due to the presence of .......... layer.aluminium sulphatealuminium oxidealuminium chloridealuminium hydroxide30s
- Q142Na + 2H₂O → 2NaOH + ......H₂Cl₂O₂N₂30s
- Q15Zinc reacts with diluted hydrochloric acid and ...... salt is formed.zinc chloridezinc sulphatezinc oxidezinc nitrate30s