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

Which azide is explosive?

• Ba(N₃)₂

• NaN₃

• KN₃

• Mg₃N₂

264.

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)