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Alkali metals can be obtained by chemica...

Alkali metals can be obtained by chemical reduction of their compounds.

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To determine whether the statement "Alkali metals can be obtained by chemical reduction of their compounds" is true or false, we can analyze the properties of alkali metals and their behavior in chemical reactions. ### Step-by-Step Solution: 1. **Understanding Alkali Metals**: Alkali metals are found in Group 1 of the periodic table and include lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr). They are known for their high reactivity, especially with water and halogens. 2. **Chemical Properties**: Alkali metals are strong reducing agents. This means they can easily lose their outermost electron to form positive ions (cations). Their strong reducing nature implies that they can reduce other substances, but they are not easily reduced themselves. 3. **Chemical Reduction**: Chemical reduction involves the gain of electrons or the decrease in oxidation state. In the case of alkali metals, they are already in a low oxidation state (+1 for their cations) and cannot be reduced further. 4. **Compounds of Alkali Metals**: Alkali metals form various compounds, such as oxides, halides, and hydroxides. However, since they are strong reducing agents, no other reducing agent can effectively reduce their compounds to obtain the pure metal. 5. **Conclusion**: Since alkali metals cannot be reduced from their compounds by any other reducing agent, the statement "Alkali metals can be obtained by chemical reduction of their compounds" is false. ### Final Answer: The statement is false because alkali metals are strong reducing agents themselves, and no other reducing agent can reduce their compounds to yield the pure metal. ---

To determine whether the statement "Alkali metals can be obtained by chemical reduction of their compounds" is true or false, we can analyze the properties of alkali metals and their behavior in chemical reactions. ### Step-by-Step Solution: 1. **Understanding Alkali Metals**: Alkali metals are found in Group 1 of the periodic table and include lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr). They are known for their high reactivity, especially with water and halogens. 2. **Chemical Properties**: Alkali metals are strong reducing agents. This means they can easily lose their outermost electron to form positive ions (cations). Their strong reducing nature implies that they can reduce other substances, but they are not easily reduced themselves. ...
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CENGAGE CHEMISTRY ENGLISH-GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF ELEMENTS-Exercise (True/False)
  1. Levigation is generally employed for concentration of sulphide ores.

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  2. Every mineral is an ore, but every ore is not a mineral.

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  3. Slag is a product formed during smelting by combination of flux and im...

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  4. Alkali metals can be obtained by chemical reduction of their compounds...

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  5. Sylvine is an ore of potassium.

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  6. Oxide ore are purified by levigation process.

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  7. During electrorefining of a metal, impure metal is made anode.

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  8. Highly pure metal can be obtained by zone refining

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  9. Aluminium is the most abundant metal in the earth's crust.

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  10. Reactive metals occur in native state.

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  11. The process of calcination and roasting is carried out in reverberator...

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  12. In calcination, ore is heated strongly in the absence of air

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  13. Copper is found both in free as well as in combined state in nature.

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  14. Below 1623 K, Al can reduce MgO to Mg, but above 1623 K, reverse is tr...

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  15. Mond's process is used for purification of titanium.

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  16. KCN forms soluble complex with silver glance.

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  17. Zinc blende on roasting often gives Zn metal.

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  18. Silver is extracted by hydrometallurgy.

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  19. The lining of blast furnace is made up of fire clay bricks.

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  20. Gypsum is an ore of magnesium.

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