| 1. | Which one of the following metals do not react with cold as well as hot water ? | |
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Fe
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Mg
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Na
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Ca
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Report Question| 2. | Which of the following metals are obtained by electrolysis of their chlorides in molten state (i) Na (ii) Ca (iii) Fe (iv) Cu ? | |
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(i) and (iii)
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(i) and (ii)
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(i) and (iv)
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(iii) and (iv)
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| 3. | Which among the following alloys contain mercury as one of its constituents ? | |
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Zinc amalgam
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Solder
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Alnico
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Stainless steel
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| 4. | Which of the following can undergo a chemical reaction ? | |
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MgSO4 + Pb
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ZnSO4 + Fe
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CuSO4 + Fe
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MgSO4 + Fe
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| 5. | Alloys are homogeneous mixtures of a metal with a metal or non-metal. Which among the following alloys contain non-metal as one of its constituents ? | |
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Amalgam
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Bronze
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Steel
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Brass
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| 6. | Generally, metals are solid in nature. Which one of the following metals is found in liquid state at room temperature ? | |
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Hg
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Cr
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Fe
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Na
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| 7. | Which of the following oxide(s) of iron would be obtained on prolonged reaction of iron with steam ? | |
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Fe2O3 and Fe3O4
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Fe2O3
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FeO
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Fe3O4
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| 8. | An element A is soft and can be cut with a knife. This is very reactive to air and cannot be kept open in air. It reacts vigorously with water. Identity the element from the following ? | |
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Ca
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P
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Na
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Mg
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| 9. | Although metals form basic oxides, which of the following metals form an amphoteric oxide ? | |
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Ca
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Cu
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Na
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Al
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| 10. | An electrolytic cell consists of (i) positively charged cathode (ii) negatively charged anode (iii) positively charged anode (iv) negatively charged cathode ? | |
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(ii) and (iv)
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(i) and (iii)
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(iii) and (iv)
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(i) and (ii)
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