Ncert Exercises & Solutions

Correlate the items listed in Column I with those listed in Column II.

Column I	Column II
A. Synthesis gas	1. Na₂[Na₄(PO₃)₆ ]
B. Heavy water	2. Mixture of CO and H₂
C. Calgon	3. Prolonged electrolysis of water
D. Salt like hydrides	4. Stoichiometric compounds of s-block elements

Codes

Hint: Calgon is ${Na}_{2} [{Na}_{4} {({PO}_{3})}_{6}]$

A. Synthesis gas -Mixture of Co and H₂

B. Heavy water-Prolonged electrolysis of water

C. Calgon-

{Na}_{2} [{Na}_{4} {({PO}_{3})}_{6}]

D. Salt like hydrides-Stoichiometric compounds of s-block elements.