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Which is covalent in CaH(2), NaH BeH(2)?...

Which is covalent in `CaH_(2)`, NaH `BeH_(2)`?

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The correct Answer is:
`BeH_(2)`
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State whether the following are ionic or covalent (a) CaH_(2) (b) MgO (c ) Na_(2)CO_(3) (d) NH_(4)CI (e) HCI (f) CaCI_(2) (g) Na_(2)S (h) SnCI_(2) (i) Diamond (j) CaC_(2) (k) NaH (i) C_(2)H_(2) .

SiO_2 is a covalent compound .

Arrange the following (i) CaH_(2), BeH_(2) and TiH_(2) in order of increasing electrical conductance. (ii) LiH, NaH and CsH in order of increasing ionic character. (iii) H–H, D–D and F–F in order of increasing bond dissociation enthalpy. (iv) NaH, MgH_(2) and H_(2)O in order of increasing reducing property.

Arrange the following in the order of their decreasirg acidic strength CH_(4) , LiH , BeH_(2) , H_(2)O , HF , NH_(3)

Which hydrolysis reaction is not correct? (A) CaH_(2)+2H_(2)O rarr Ca(OH)_(2)+2H_(2) (B) CaC_(2)+2H_(2)O rarr Ca(OH)_(2)+C_(2)H_(4) (C) AlN+3H_(2)O rarr Al(OH)_(3)+NH_(3) (D) Ca_(3)P_(2)+6H_(2)O rarr Ca(OH)_(2)+2PH_(3)

Which of the following order are correct ? {:((a)TiH_(2) lt BeH_(2) lt CaH_(2)-"Electrical conductance ",(b)LiH lt NaH lt CaH-"Ionic character",,,),((c)F-F- lt H-H lt D-D-"Bond dissociation enthalpy",(d)H_(2)O lt MgH_(2)lt NaH-"Reducing character",,,):}

Describe the difference in structure between CaH_2 and BeH_2

DINESH PUBLICATION-S-BLOCK ELEMENTS (ALKALI AND ALKALINE EARTH METALS )-Problems For Practice
  1. Which alkali metal hydride is used for filling meterological ballons?

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  2. Water glass is:

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  3. (a) Name the most abundant metal in the earth's crust. (b). Name the...

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  4. Which alkali metal chloride is soluble in alcohol?

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  5. In Down's process for the manufacture of sodium , CaCl(2), is added to...

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  6. Among LiF and LiI, which has more covalent character and why ?

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  7. The alkaline earth metals, which do not impart any colour to Bunsen fl...

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  8. Lithium resembles magnesium in some respects though placed in a differ...

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  9. Epson salt's chemical formula is

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  10. Which are more electropositive - alkali metals or alkaline earth metal...

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  11. Which is quick lime ?

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  12. Magnesite is an ore of .

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  13. The correct order of relative basic character of NaOH, Mg(OH)(2) and A...

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  14. Which alkaline earth metal constitute Grignard reagent?

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  15. ArrangeCaSO(4), MgSO(4), BaSO(4) in increasing solubility in water.

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  16. Name the compound of Mg, O, Cl and H used as cement for joining cracke...

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  17. Which is covalent in CaH(2), NaH BeH(2)?

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  18. Name a compound of calcium and hydrogen used as a portable source of h...

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  19. Name the salt which is generally given to the patient before taking st...

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  20. Arrange BeCl(2), MgCl(2), CaCl(2), SrCl(2) and BaCl(2) in increasing o...

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