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Alkali metals form peroxides and superox...

Alkali metals form peroxides and superoxides except

A

`Na`

B

`Rb`

C

`Li`

D

`Cs`

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To solve the question regarding which alkali metal does not form peroxides and superoxides, we can follow these steps: ### Step 1: Understand the Alkali Metals Alkali metals include Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Rb), and Cesium (Cs). ### Step 2: Identify the Compounds Formed by Alkali Metals - **Lithium (Li)**: Forms oxides (Li2O) and does not form peroxides or superoxides. - **Sodium (Na)**: Forms peroxides (Na2O2) when reacting with oxygen. - **Potassium (K)**: Forms peroxides (K2O2) and superoxides (KO2). - **Rubidium (Rb)**: Forms superoxides (RbO2). - **Cesium (Cs)**: Forms peroxides (Cs2O2) and superoxides (CsO2). ### Step 3: Analyze Each Option - **Option 1: Lithium (Li)** - Does not form peroxides or superoxides. - **Option 2: Sodium (Na)** - Forms peroxides. - **Option 3: Rubidium (Rb)** - Forms superoxides. - **Option 4: Cesium (Cs)** - Forms peroxides and superoxides. ### Step 4: Conclusion From the analysis, we can conclude that **Lithium (Li)** is the only alkali metal that does not form peroxides or superoxides. ### Final Answer **Lithium (Li)** is the alkali metal that does not form peroxides and superoxides. ---
To solve the question regarding which alkali metal does not form peroxides and superoxides, we can follow these steps: ### Step 1: Understand the Alkali Metals Alkali metals include Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Rb), and Cesium (Cs). ### Step 2: Identify the Compounds Formed by Alkali Metals - **Lithium (Li)**: Forms oxides (Li2O) and does not form peroxides or superoxides. - **Sodium (Na)**: Forms peroxides (Na2O2) when reacting with oxygen. ...
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In hydroysis, the alkali metal oxdes, peroxides and superoxides act as

Lithium only forms monoxide when heated in oxygen. Sodium forms monoxide and peroxide in excess of oxygen. Other alkali metals form superoxide metals superoxide with oxygen i.e., MO_(2) . The abnormal behaviour of lithium is due to small size. The larger size of higher metals also decides the role in formation of superoxide. All the three anions abstract proton from water. The three anions are raleted to each other as follows: underset("oxide ion")(O^(2-)overset((1)/(2)O_(2))(to)underset("peroxide ion")(O_(2)^(2-))overset(O_(2))(to)underset("superoxide ion")(2O_(2)^(-)) Q. In hydrolysis, the alkali metals oxides, peroxide and superoxide act as:

Lithium only forms monoxide when heated in oxygen. Sodium forms monoxide and peroxide in excess of oxygen. Other alkali metals form superoxide metals superoxide with oxygen i.e., MO_(2) . The abnormal behaviour of lithium is due to small size. The larger size of higher metals also decides the role in formation of superoxide. All the three anions abstract proton from water. The three anions are raleted to each other as follows: underset("oxide ion")(O_(2)^(2-)overset((1)/(2)O_(2))(to)underset("peroxide ion")(O_(2)^(2-))overset(O_(2))(to)underset("superoxide ion")(2O_(2)^(-)) Q. Consider the following reaction : M+O_(2) to MO_(2) (M=alkali metal) (stable superoxide)

Lithium only forms monoxide when heated in oxygen. Sodium forms monoxide and peroxide in excess of oxygen. Other alkali metals form superoxide metals superoxide with oxygen i.e., MO_(2) . The abnormal behaviour of lithium is due to small size. The larger size of higher metals also decides the role in formation of superoxide. All the three anions abstract proton from water. The three anions are raleted to each other as follows: underset("oxide ion")(O_(2)^(2-)overset((1)/(2)O_(2))(to)underset("peroxide ion")(O_(2)^(2-))overset(O_(2))(to)underset("superoxide ion")(2O_(2)^(-)) Q. Which compounds will liberate oxygen when reacts with ice cold water?

Alkali metals burn in air to form oxides, peroxides and superoxides. Lithium burns in moist air to form normal oxide as the major product. Some lithium nitride is also formed if nitrogen is present. Sodium loses lustre and forms both normal oxide and peroxide, the peroxide being the major product. Rest of all alkali metals form peroxides. All metals can be forced to form oxides, peroxides and superoxides by dissolving in liquid ammonia and bubbling appropriate amount of O_(2) . Which of the following oxides is the strongest oxidising agent :

Alkali metals burn in air to form oxides, peroxides and superoxides. Lithium burns in moist air to form normal oxide as the major product. Some lithium nitride is also formed if nitrogen is present. Sodium loses lustre and forms both normal oxide and peroxide, the peroxide being the major product. Rest of all alkali metals form peroxides. All metals can be forced to form oxides, peroxides and superoxides by dissolving in liquid ammonia and bubbling appropriate amount of O_(2) . Which among the following oxides turn red litmus paper blue :

DISHA PUBLICATION-THE s-BLOCK ELEMENTS-Exercise - 1 : Concept Builder (Topicwise)(TOPIC 1 : Preparation and Properties of Alkali Metals and their Compounds)
  1. Which of the following is known as fusion mixture ?

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  2. The dominant cation in the blood plasma (extracellular fluid) is

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  3. Among LiI, NaI, KI the one which is more ionic and more soluble in wat...

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  4. Based on lattice energy and other considerations which one of the foll...

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  5. The correct order of radii is A)N lt Be lt B B)F^(-) lt O^(2-) lt N^...

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  6. The melting point of lithium (181^(@)C) is just double the melting poi...

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  7. Alkali metals are generally extracted by

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  8. Which of the following has the least ionization potential ?

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  9. Fires, that result from the combustion of alkali metals can be extingu...

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  10. The stability of the following alkali metal chlorides follows the orde...

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  11. The order of solubility of lithium halides in non-lolar solvents follo...

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  12. Alkali metals form peroxides and superoxides except

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  13. Which of the following is used as a source of oxygen in square capsule...

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  14. Which of the following statements is false for alkali metals ?

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  15. Which of the following statements is correct for CsBr(3)?

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  16. The solubility order for alkali metal fluoride in water is :

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  17. An alloy of which pair of metals is liquid at ordinary temperature and...

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  18. An alkaline metal oxide which is soluble in NaOH has

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  19. The alkali metals which form normal oxide, peroxides as well as super ...

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  20. Which of the following compounds are paramagnetic in nature?

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