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Be and Mg do not give colour to flame wh...

`Be` and `Mg` do not give colour to flame whereas other alkaline earth metals do so. Why?

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UNITED BOOK HOUSE-MODEL QUESTION PAPER 2-EXERCISE
  1. What do you mean by ‘Non-stoichiometric hydrides'? Do you expect .this...

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  2. Which out of MgCO3, SrCO3 and BaCO3 possesses highest thermal stabilit...

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  3. Be and Mg do not give colour to flame whereas other alkaline earth met...

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  4. why are alkali metals stored in kerosene ?

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  5. What happens when calcium nitrate is heated.

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  6. CH3Cl is unreactive towards. SN^1 reaction.Why?

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  7. Dipole moment of nitrobenzene is greater than that of nitroethane.Why?

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  8. Give example of a non-nucleophilic anion.

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  9. Explain the orders of acidity of carboxylic acids. Cl3CCOOH > Cl2 CHCO...

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  10. State Le Chatelier's principle. Discuss the effect of pressure, concen...

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  11. Two moles of HI were heated in a scaled tube at 440^@Cuntil the equili...

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  12. Find out Kp//Kc for: CO(g)+frac 1/2 O2 (g) overset (rarr)(larr) CO2 (g...

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  13. What will be pH of the solution obtained by mixing 50 ml 0.1 (N) CH3CO...

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  14. What will happen when a solution of potassium chloride is added to a s...

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  15. Explain : Boric acid is a weak acid.

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  16. Explain :Tin (II) is reducing agent but Pb (II) is not.

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  17. Complete the following reaction : BF3+LiH rarr

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  18. Carry out of.the following transformation : HC-= CH rarr Oxalic acid

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  19. Carry out of.the following transformation :HC -= CH rarr CH3C -=C-CH3

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  20. : Identify 'X'.

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