Properties of H2

Question 1

physical properties of H2

Answer 1

Colorless,odorless,tasteless gas
highly inflammable and burns with a pop sound
non polar,but sparingly soluble in water
lighter than air

Question 2

compare reactivity of F2,Cl2,Br,I2
with H2

Answer 2

F2>Cl2>Br2>I2

Question 3

compare energy released in formation of :
i)H2O,H2S,H2Se,H2Te
ii)NH3,PH3,AsH3,SbH3

Answer 3

i)H2O(exo)>H2S(exo)>H2Se(endo)>H2Te
ii)NH3(exo)>PH3(endo)>AsH3>SbH3

Question 4

M + H2–>Metal Hydride
Ca + H2–>A–H2O–>B+C

Answer 4

Ca + H2–>CaH2
CaH2 + H2O–>Ca(OH)2 + H2

Question 5

H2 + MxOy–>
H2 + Pd+2(aq)–>

Answer 5

H2 + MxOy–>M(s) + H2O
H2 + Pd+2(aq)–>Pd + H+(aq)

Question 6

Alkene/Alkyne + H2,Ni–>
H2 + CO + RHC=CH2–>
H2 + RCH2 + CH2-CHO–>

Answer 6

Alkene/Alkyne + H2,Ni–>Alkane
H2 + CO + RHC=CH2–>RCH2-CH2-CHO
H2 + RCH2 + CH3-CHO–>RCH2-CH2-CH2OH