NEET Questions Solved


In the preparation of hydrogenated oil the chemical reaction involving hydrogen is called:

(a) hydrogenation

(b) reduction

(c) dehydration

(d) oxidation

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The most abundant isotope of hydrogen is:

(a) tritium

(b) deuterium

(c) protium

(d) para-hydrogen

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Hydrogen is evolved by the action of cold dilute HNO3 on:

(a) Fe

(b) Mg or Mn

(c) Cu

(d) Al

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Hydrogen is not obtained when zinc reacts with:

(a) cold water

(b) dil. H2SO4

(c) dil HCl

(d) hot 20% NaOH

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Very pure hydrogen (99.9%) can be made by which of the following processes ?

(a) Mixing natural hydrocarbons of high molecular weight

(b) Electrolysis of water

(c) Reaction of salt like hydrides with water

(d) Reaction of methane with steam

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Which of the following pairs will not produce dihydrogen gas ?

(a) Cu + HCl (dil.)

(b) Fe + H2SO4

(c) Mg + steam

(d) Na + alcohol

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The metal that does not displace hydrogen from an acid is:

(a) Hg

(b) Zn

(c) Al

(d) Ca

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The catalyst used in Bosch process of manufacture of H2 is:

(a) finely divided Ni

(b) V2O5

(c) Pd

(d) Fe2O3 + Cr2O3

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In which reaction hydrogen is not formed ?

(1) Copper and hydrochloric acid

(2) Iron and sulphuric acid

(3) Magnesium and steam

(4) Sodium and alcohol

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Hydrogen will not reduce-

(A) heated cupric oxide                                 

(B) heated ferric oxide

(C) heated stannic oxide                               

(D) heated aluminium oxide

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