Chlorine atoms contribute to the destruction of the Earth’s ozone layer by the following sequence of reactions: Cl + O 3 → ClO + O 2 ClO + O → Cl + O 2 where the O atoms in the second step come from the decomposition of ozone by sunlight: O 3 (g) → O(g) + O 2 (g) What is the net equation on summing these three equations? Why does this lead to ozone loss in the stratosphere? What is the role played by Cl in this sequence of reactions? What name is given to species such as ClO?
Chlorine atoms contribute to the destruction of the Earth’s ozone layer by the following sequence of reactions: Cl + O 3 → ClO + O 2 ClO + O → Cl + O 2 where the O atoms in the second step come from the decomposition of ozone by sunlight: O 3 (g) → O(g) + O 2 (g) What is the net equation on summing these three equations? Why does this lead to ozone loss in the stratosphere? What is the role played by Cl in this sequence of reactions? What name is given to species such as ClO?
Chlorine atoms contribute to the destruction of the Earth’s ozone layer by the following sequence of reactions:
Cl + O3 → ClO + O2
ClO + O → Cl + O2
where the O atoms in the second step come from the decomposition of ozone by sunlight:
O3(g) → O(g) + O2(g)
What is the net equation on summing these three equations? Why does this lead to ozone loss in the stratosphere? What is the role played by Cl in this sequence of reactions? What name is given to species such as ClO?
When natural light falls perpendicularly on a material A, it has a reflectivity of 0.813%. Indicate the value of the refractive index.
In piezoelectricity and piezoelectric ceramics, one of the following options is false:(A). Piezoelectricity allows an electrical signal to be transformed into a mechanical one.(B). PbZrO3 is a well-known piezoelectric ceramic.(C). Piezoelectricity and ferroelectricity in general have no relationship.(D). One of the applications of piezoelectricity is sonar.
(30 MARKS) Give the major product(s
) formed including relevant
stereochemistry or the complete
reaction conditions for the following
reactions. More than one step may be
required for each reaction arrow, in
which case the steps must be
numbered 1), 2) etc. (2 marks each
box) h)
i)
h)
OH
i)
HO
H3PO4, heat
2
Br
Physics for Scientists and Engineers: A Strategic Approach, Vol. 1 (Chs 1-21) (4th Edition)
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Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell