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What type of hydrides do not possess def...

What type of hydrides do not possess definite composition

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ICSE-HYDROGEN-VERY SHORT ANSWER TYPE QUESTIONS
  1. Name the groups whose elements prefer to form molecular hydrides.

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  2. What type of hydrides are formed by transition elements ?

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  3. What type of hydrides do not possess definite composition

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  4. What type of hydrides are formed by Be and Mg?

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  5. What is the shape of a water molecule ?

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  6. How many hydrogen bonds can be formed by a water molecule?

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  7. What type of forces are responsible for the aggregation of water molec...

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  8. What is the action of water on litmus ?

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  9. Define hard water.

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  10. What are the causes for Temporary hardness

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  11. What are the causes for Permanent hardness

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  12. Can temporary hardness be removed simply by boiling the hard water?

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  13. Which chemical is used in softening of hard water by Clark's method?

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  14. Write the chemical formula of sodium zeolite.

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  15. What is the chemical composition of calgon ?

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  16. What type of functional groups are present in cation exchange resins?

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  17. How is the exhausted anion exchange resin regenerated ?

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  18. How many electrons are required for one fluorine atom to attain the oc...

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  19. Which gas is evolved when heavy water is made to react with calcium ca...

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  20. Name the product formed on dissolving SO(3) In heavy water.

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