hydrogen !! not so easy ..for jee advanced 2018 ..ncert is bible
HOW MANY STATEMENTS BELOW ARE CORRECT? 1)relative abundance percentage of hydrogen>deuterium>tritium. 2)enthalphy of vaporization and fusion of deuterium is greater than that of hydrogen 3)inter nuclear distance of hydrogen and deuterium is not the same 4)melting point and boiling point of hydrogen deuterium> hydrogen. 5)reaction of di hydrogen with dioxygen is an exothermic reaction. 6)dihydrogen reacts with dinitrogen to yeild ammonia in presence of Fe as catalyst 7)hydrogen oxides only those elements which are less active than iron 8)hydroformylation of olefin yield aldehydes with further on reduction yield alcohols 9)high purity dihydrogen is obtained by electrolysis of barium hydroxide solution with nickel electordes 10) ionization enthalpy of hydrogen resembles tat of alkali metals 11 ) hydrogen is more reactive than halogens 12)reaction of steam with coke does not yield dihydrogen in absence of platinum electrodes
The answer is 9.
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1 solution
1-true 2-true 3-false..inter nuclear distance of deuterium and hydrogen is the same 4-true 5-true 6-true 7-true 8-true 9-true 10-false( ionization enthalpy of hydrogen resembles more with tat of halogens 11-false(hydrogen is less reactive than halogens) 12-true(reaction off coke with steam yields dihydrogen only in presence of platinum electrodes)