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Name the alkali metals which form supero...

Name the alkali metals which form superoxides when heated in excess of air.

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K, Rb and Cs are the alkali metals which form superoxides when heated in excess of air.
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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?

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 anion is stable towards water:

When heated in air, the alkali metals form various oxides. Mention the oxides formed by Li,Na and K.

ICSE-SAMPLE QUESTION PAPER 4-Questions
  1. Which quantum number does not depend upon the value of n?

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  2. For a given value of l, how many values of m are permissible?

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  3. Name the alkali metals which form superoxides when heated in excess of...

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  4. Name the metal which floats on water without any apparent reaction wit...

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  5. Identify primary, secondary, tertiary and quaternary carbon atoms in t...

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  6. What type of isomerism is exhibited by the following equilibrium ? ...

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  7. 0.1092 g of a dibasic acid is exactly neutralized by 21cm^(3) of 0.1N ...

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  8. 0.500 g of the silver salt of an organic dibasic acid on ignition give...

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  9. What is oxidation number? Mention the working rules used to calculate ...

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  10. Find the oxidation number of: Cr in K(2)Cr(2)O(7)

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  11. 7.00 g of a gas occupies a volume of 4.1 L at 300 K and 1 atm pressure...

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  12. Write the structural formula of the compounds having the following IUP...

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  13. Write the structural formula of the compounds having the following IUP...

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  14. Why are potassium and caesium rather than lithium used in photoelectri...

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  15. How will you convert methane to ethane

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  16. How will you convert ethane to methane?

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  17. A hydrocarbon decolourised bromine water. On ozonolysis it gives 3-met...

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  18. Discuss the structure of aluminium chloride.

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  19. Why does chromium have configuration of type 3d^(5) 4s^(1) instead of ...

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  20. How many electrons possess anticlockwise spin in an atom of oxygen?

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