211) c
2) d
1. Which of the following statements is false ?
(a) Saline hydrides are stoichiometric compounds.
(b) Ionic hydrides are crystalline,non-metallic and non-conducting in solid state.
(c) The melts of ionic hydride are non-conducting.
(d) Electrolysis of saline hydrides yields H2 gas at anode.
2. All the following substances react with water.The pair that gives the same gaseous product is
(a) K and CO2
(b) Na and Na2O2
(c) Ca and CaH2
(d) Ba and BaO2
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6 Answers
1@Saket :
Most of the s-block metals form ionic hydrides. These are non-volatile, non-conducting crystalline solids
29Ans2
2K + 2H2O → 2KOH + H2
CO2 + H2O → H2CO3
2Na + 2H2O → 2NaOH + H2
Na2O2 + 2H2O → 2NaOH + H2O2
Ca + 2H2O → Ca(OH)2 + H2
CaH2 + 2H2O → Ca(OH)2 + H2
Ba + 2H2O → Ba(OH)2 + H2
BaO2 + 2H2O → Ba(OH)2 + H2O2
So C is correct
29@ E = MC2
we are asked abt the false statement and option c is false...because the hydrides are conducting in molten form..so Saket's answer for question 1 is correct
