Multiple Choice Questions

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Which azide is explosive?

  • Ba(N3)2

  • NaN3

  • KN3

  • Mg3N2


A.

Ba(N3)2

Ionic azides are usually much more stable e.g. KN3, NaN3 and Mg3N2 than the covalent azides. Covalent azides are used as detonators and explosives e.g. Ba(N3)2.


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Enzymes that utilize ATP in phosphate transfer require an alkaline earth metal (M) as the cofactor. M is :

  • Mg

  • Ca

  • Sr

  • Be


Which of the following is soluble in water?

  • Br

  • Sr

  • Mg

  • Ba


Match List I with List II and choose correct answerfrom the codes given below

List I List II
A. NaNO3 (i) Baking soda
B. Na(NH4)HPO4 (ii) Chile salt
C. NaHCO3 (iii)Microcosmic salt
D. Na2CO3 . 10H2O (iv)Washing soda

  • A     B     C     D

    (i)  (ii)  (iii)   (iv)

  • A     B     C     D

    (ii)  (iii)   (i)   (iv)

  • A     B     C    D

    (iii)  (i)  (ii)  (iv)

  • A      B    C    D

    (iv)  (i)  (ii)  (iii)


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