hydrogen

Question 1

at ___ K hydrogen exists in atomic form

Answer 1

5000 k

Question 2

both H and ____ exist in +1 oxidation state

Answer 2

alkali metals

Question 3

nature of bonding when H forms compounds with non metal in ___, while alkali metals is ___

Answer 3

covalent

ionic

Question 4

_____ of H is very high as compared to Li

Answer 4

ionization enthalpy

Question 5

___ and hydrogen has comparable ionizaton enthapy

Answer 5

flourine

Question 6

name the 3 isotopes of h

Answer 6

protium
deuterium
tritium

Question 7

atomic mass of protium

Answer 7

1 (1 proton, 1 neutron)

Question 8

atomic mass of deuterium

Answer 8

2 (1p, 1n, 1e)

Question 9

atomic mass of tritium

Answer 9

3 (1p, 2n 1e)

Question 10

hydrogen mainly exists as __ isotope

Answer 10

protium

Question 11

percentage abundance of deutrium

Answer 11

0.015%

Question 12

which isotope of hydrogen is radioactive in nature

Answer 12

tritium

Question 13

half life of tritium

Answer 13

12.33 yearss

Question 14

% abundance of tritium

Answer 14

1 atom is 10^18 atoms of H

Question 15

for metal displacement lab prep of dihydrogen, how to make rxn. faster

Answer 15

use impure Zn electrode

Question 16

define discharge potential

Answer 16

the tendency of an ion to get converted to its neutral form

Question 17

tru or false.. high SOP= faster oxidation

Answer 17

true

Question 18

arrange in order of increasing SOP-> no3, so4, cl-, oh-

Answer 18

so4oh->cl-

note:in place of cl-, there can be any halide anion

Question 19

____ with more sop will get neutral faster

Answer 19

anion
(cause in order for anion to get neutral, it has to lose electrons. oxidation means lose of electrons, so high sop means more oxidation, so anion with more sop will get neutral faster,)

Question 20

___ turns neutral after reduction

Answer 20

cation

Question 21

reduction occurs at anode or cathode

Answer 21

cathode (cause cathode is negative terminal, so electrons will be there, so anion can gain electron, thus reduction)

Question 22

reaction at cathode in electrolysis of water

Answer 22

(2H+) + (2e-) → H2

Question 23

reaction at anode in electrolysis of water

Answer 23

(2OH-) → (H2O)+ (0.5 O2)+ (2e-)