Which of the following ions can be replaced by H+ ions when H2 gas is bubbled through the solutions containing these ions ?
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Solution
Among the given ions, only Cu2+ lies below H2+ in electrochemical series.
The adsorption of hydrogen by metals is called
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Solution
Occlusion is the phenomenon of adsorption of hydrogen by metal.
In Bosch’s process which gas is utilised for the production of hydrogen gas ?
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Solution
\(\underbrace{CO+H_{2}}+H_{2}O\overset{catalyst}{\rightarrow}CO_{2}+2H_{2}\)
Hydrogen accepts an electron to form inert gas configuration. In this it resembles
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Solution
H + e-(1s1)→H-(1s2or [He])
F + e-([He]2s22p5)→ F- ([He] 2s2 2p6 or [Ne])
The property of hydrogen which distinguishes it from alkali metals is
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Solution
Hydrogen is a non-metal while all other members of group 1 (alkali metals) are metals.
Which cannot be oxidised by H2O2 :
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Solution
H2O2 cannot oxidise O3.
O3 oxidises H2O2
H2O2+ O3 → H2O + 2O2
Option (d) is correct.
Hydrogen can be have as a metal
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Solution
Hydrogen behaves as a metal at very high pressure.
On industrial scale, H2O2 is now generally prepared by
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Solution
By electrolysis of 50% ice cold H2SO4.
2H2SO4→2H++2HSO4-
At anode: 2HSO4-→H2S2O8+2e-
H2S2O8+H2O→H2SO5+H2SO4
H2SO5+H2O→H2SO4H2O2
Hydrogen is evolved by the action of cold dil. HNO3 on
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Solution
Mn + 2HNO3(dil.)→Mn(NO3)2+ H2
Hydrogen will not reduce
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Solution
H2 will not reduce heated Al2O3. As Al is more electro-positive than hydrogen. therefore, its oxide will not bereduced by hydrogen.