question_answer 1)

    Correlate the items listed in Column I with those listed in Column II. Find out as many correlations as you can.  

Column I	Column II
(i) Synthesis gas	(a) \[N{{a}_{2}}\left[ N{{a}_{4}}{{(P{{O}_{4}})}_{6}} \right]\]
(ii) Dihydrogen	(b) Oxidising agent
(iii) Heavy water	(c) Softening of water
(iv) Calgon	(d) Reducing agent
(v) Hydrogen peroxide	(e) Stoichiometric compounds of s-block elements
(vi) Salt like hydrides	(f) Prolonged electrolysis of water
	(g) \[Zn+NaOH\]
	(h) \[Zn\text{ }+\text{ }dil.\text{ }{{H}_{2}}S{{O}_{4}}\]
	(i) Synthesis of \[C{{H}_{3}}OH\]
	(j) Mixture of CO and \[{{H}_{2}}\]

 

Answer:

  Synthesis gas is a mixture of CO and \[{{H}_{2}}\]and used for manufacture of methanol (i-i - j) Dihydrogen is a reducing agent. It forms stoichiometric compounds with s-block elements. It is prepared by action of Zn and\[NaOH,Zn+Dil.{{H}_{2}}S{{O}_{4}},\]etc. It is used in the synthesis of methanol. (ii-d, e, g, h, i) Heavy water is prepared by prolonged electrolysis of water. (iii ?f) Calgon is \[N{{a}_{2}}[N{{a}_{4}}{{(P{{O}_{4}})}_{6}}]\] and is used for softening of water (iv-a, c) Hydrogen peroxide acts as an oxidising agent as well as a reducing agent. (v-b, d) Salt like hydrides are stoichiometric compounds of s-block elements. (vi-e)