Atomic hydrogen produces formaldehyde when it reacts with:
(1)
(2) CO
(3)
(4)
The percentage of a para-hydrogen in ordinary hydrogen increases when:
1. temperature is lowered
2. temperature is increased
3. pressure is increased and temperature decreased
4. none of these
Para- hydrogen at room temp is:
1. less stable than ortho- hydrogen
2. more stable than ortho- hydrogen
3. as stable as ortho- hydrogen
4. none of these
The hydrogen at the moment of it's formation is called:
1. Atomic
2. Ortho
3. Para
4. Nascent
Which one is used as propellants for rockets?
1.
2.
3.
4.
Reaction among the following where acts as a reducing agent is-
a.
b.
c.
d.
1. a, b
2. c, d
3. a, c
4. b, d
Hydrogen peroxide in its reaction with respectively is acting as a
1. reducing agent, oxidising agent
2. reducing agent, reducing agent
3. oxidising agent, oxidising agent
4. oxidising agent, reducing agent
The acidified solution of is reduced by passing:
(1) ordinary
(2)
(3) nascent H
(4)
Nascent hydrogen consists of :
(1) hydrogen atoms with excess energy
(2) hydrogen molecules with excess energy
(3) hydrogen ions in an excited state
(4) solvated protons
The conversion of atomic hydrogen into ordinary hydrogen is:
1. exothermic change
2. endothermic change
3. nuclear change
4. photochemical change