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
Which one is used as propellants for rockets?
1.
2.
3.
4.
The hydrogen at the moment of it's formation is called:
1. Atomic
2. Ortho
3. Para
4. Nascent
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 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
Atomic hydrogen produces formaldehyde when it reacts with:
(1)
(2) CO
(3)
(4)
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