29Ans1 : 2F2 + 2H2O → 4H+ + 4F- + O2 NCERT pg 195
Ans 2 ..H2S < H2Se < H2Te < H2O
Ans 3..yes it changes if the solvent is volatile..
Ans 4 Catalyst V2O5
Ans 5...formation of delta is due to coagulation..
1. write reaction of F2 with water.
2. write the ascending order of boiling pts of H2O,H2S,H2,H2Se,H2Te
3. Is mole fraction constant with change in temperature?if yes,why?
4. what is the promoter in contact process(was there any??)
5. explain the formation of a delta.
all ques are taken from together with CBSE sample test papers
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3 Answers
29
11. 2F2 + H2O (COLD) ----------> 4 HF + O2
3F2 + H2O (HOT)---------> 6 HF + O3
395. River water contains colloidal particles which constitute charge and seawater is a storehouse of electrolytes. Where rivers and seas meet, coagulation occurs due to addition of electrolyte to colloid. This causes silting of the estuary, which is why a delta is formed.
