10 JEE Main 2020 Hydrogen previous-year questions with verified answers and step-by-step solutions.
These are the JEE Main 2020 previous-year questions from the Hydrogen chapter of Chemistry. Each links to a full solution with a verified answer key. To see the whole chapter across all years, visit the Hydrogen chapter hub.
Consider the following equations : 2 Fe 2 + + H 2 O 2 → xA + yB (in basic medium) 2 MnO 4 - + 6 H + + 5 H 2 O 2 &…
In comparison to the zeolite process for the removal of permanent hardness, the synthetic resin method is
Among the reactions a - d , the reaction(s) that does/do not occur in the blast furnace during the extraction of iron i…
The equation that represents the water-gas shift reaction is :
Among statements a - d , the correct ones are: a Decomposition of hydrogen peroxide gives di-oxygen. b Like hydrogen pe…
The one that is NOT suitable for the removal of permanent hardness of water is :
Hydrogen peroxide, in the pure state, is :
The hardness of a water sample containing 10 - 3  M  M g S O 4 expressed as C a C O 3 equivalents (in p p m )…
Dihydrogen of high purity > 99 . 95   % is obtained through :
5 g of zinc is treated separately with an excess of ( a ) dilute hydrochloric acid and ( b ) aqueous sodium hydroxide.…