B.Sc. Third year (UG degree course) Semester Fifth, Physical chemistry paper-XIII
Chapter – Photochemistry
a) the presence of light is the primary requirement for reactions to take place
b) temperature has a very little effect on the rate of photochemical reactions
c) ΔG for photochemical spontaneous reactions may +ve or –ve
d) all of the above
2. “It is only the absorbed light radiations that are effective in producing a chemical reaction.” This is the statement of
a) Lambert law
b) Lambert-Beer law
c) Grothus-Draper law
3. “In a photochemical
reaction each molecule of the reacting substance absorbs a single photon of radiation
causing the reaction and is activated to form the products.” This is the
statement of
a) Lambert-Beer’s law
b) Grothus-Draper law
c) Stark-Einstein law
d) Lambert’s law
4. For a reaction that
obeys Einstein law,
a) φ = 1
b) φ > 1
c) φ < 1
d) φ = 0
5. In some
photochemical reactions low quantum yield is obtained. It is due to
a) deactivation of
reacting molecules
b) occurrence of reverse
primary reaction
c) recombination of
dissociated fragments
d) all of these
6. The energy
associated with a photon is given by the equation
a) ∈ = h × Î»
b) ∈ = h × v
c) ∈ = h × c
d) ∈ = h × c2
7. One einstein is the
energy associated with
a) one molecule
b) one photon
c) Avogadro number of
photons
d) Faraday number of
photons
8. A species which can
both absorb and transfer radiant energy for activation of the reactant molecule
is called
a) radioactive substance
b) an ioniser
c) a photochemical
substance
d) a photosensitizer
9. The reactions which
are caused by heat and in absence of light are called
a) photochemical
reactions
b) catalytic reactions
c) exothermic reactions
d) thermal or dark
reactions
10. “Only the fraction
of incident light that is absorbed by the substance can bring about a chemical change”.
is
a) First law of
photochemistry
b) Second law of
photochemistry
c) Third law of
photochemistry
d) none of these
Spectroscopy MCQ
Click here
Organometallic Compounds MCQ
Click here
Organic Synthesis via Enolates MCQ
Click here
Fats, oils and detergents MCQ
Click here
V Semester Physical Chemistry
Elementary quantum mechanics MCQ-3
Click here
Elementary quantum mechanics MCQ-2
Click here
Elementary quantum mechanics MCQ-1
Click here
Introduction to Spectroscopy MCQ-2
Click here
Introduction to Spectroscopy MCQ-1
Click here
Photochemistry MCQ-3
Click here
Photochemistry MCQ-2
Click here
Photochemistry MCQ-1
Click here
B.Sc. Third Year Chemistry Old Question papers Semester-V Paper No. XIII, XIV
Click here
Elementary quantum mechanics. Handwritten notes
Click here
Nano materials pdf Handwritten notes
Click here
Photochemistry pdf Notes download
Click here
Introduction to Spectroscopy pdf
Click here
Molecular structure and physical properties pdf Notes
