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What is the formula of the oxide formed ...

What is the formula of the oxide formed on burning potassium in oxygen?

A

`K_2O`

B

`K_2O_2`

C

`KO_2`

D

`K_4O_2`

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UNITED BOOK HOUSE-HIGHER SECONDARY EXAMINATION 2017-EXERCISE
  1. The quantity of electricity required to electrolyse separately 1 M aqu...

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  2. What is the formula of the oxide formed on burning potassium in oxygen...

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  3. When tetraminechloridonitritio cobalt (III) nitrate is dissolved in wa...

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  4. Which of the following compounds is formed when phenol is heated with ...

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  5. Which of the following is a biodegradable polymer?

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  6. A compound X is used as an antiseptic in 0.2% solution and as a disinf...

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  7. Which of the following exists as covalent crystals in the solid state-

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  8. The process by which alum purifies turbid water is

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  9. Which one of the following atomic numbers is that of a lanthanoid elem...

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  10. Which of the following compounds most readily undergoes solvolysis by ...

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  11. In the solid state which of the following is the structure of alanine?

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  12. Which of the following is not a food preservative?

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  13. Mark the hydrophobic and hydrophilic parts of the following syn-thetic...

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  14. Atoms of which two elements among the following are of same size ? Zr,...

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  15. What would be the value of paramagnetic spin moment of K3[Fe(CN)6]? (A...

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  16. For which phenomenon colloidal particles do not settle down?

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  17. It 193000 coulomb of electricity is passed through a metallic wire, ho...

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  18. Write the appropriate Nernst equation for the following half-cell reac...

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  19. Write down the van't Hoff equation for osmotic pressure of a solution....

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  20. When urea is added to water the freezing point decreases. Explain why.

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