Q. No.In the preparation of hydrogenated oil the chemical reaction involving hydrogen is called:
1. hydrogenation
2. reduction
3. dehydration
4. oxidation
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The most abundant isotope of hydrogen is:
1. tritium
2. deuterium
3. protium
4. para-hydrogen
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Hydrogen is evolved by the action of cold dilute HNO3 on:
1. Fe
2. Mg or Mn
3. Cu
. Al
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A molten ionic hydride on electrolysis gives:
1. H+ ion moving towards the cathode
2. H+ ion moving towards the anode
3. H2 is liberated at anode
4. H2 is liberated at cathode
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In solid hydrogen, the intermolecular bonding is:
1. ionic
2. van der Waals'
3. metallic
4. covalent
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The lightest gas is :
1. nitrogen
2. helium
3. oxygen
4. hydrogen
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Benzene is oxidized by H2O2 in presence of FeSO4 to:
1. phenol
2. cyclohexane
3. benzaldehyde
4. benzoic acid
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The oxidizing property of H2O2 is best explained by assuming that two oxygen atoms in its molecule are:
1. bonded differently
2. bonded similarly
3. bonded covalently
4. bonded by hydrogen bonds
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10 volumes of H2O2 has a strength of approximately:
1. 3%
2. 30%
3. 10%
4. 5%
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H2O2 turns an acidified solution of ........ to orange red.
1. BaO2
2. PbO2
3. Na2O2
4. TiO2
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